Paleo Lifestyle Change?
Replies
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I'm not sure about toxins and liver damage, I've not heard of that, but there may be concerns. Also being in ketosis doesn't mean no carbs.....some trained athletes can consume 100g of carbs and still be in ketosis, most people could probably consume 50+ and still be in ketosis. Maybe look at populations that might live this way and look at their health, the Inuit for example, they seemed to thrive pretty well for the majority of the year considering they've been around 30-40,000 yrs. Anyway gluconeogenesis happens 24 hours a day regardless, so I would imagine the body doesn't see this as minor phenomena that could cause damage. But I really don't know, just a guess.
The Inuit are a good example.Because the climate of the Arctic is ill-suited for agriculture and lacks forageable plant matter for much of the year, the traditional Inuit diet is unusually low in carbohydrates and high in fat and animal protein. In the absence of carbohydrates, protein is broken down in the liver through gluconeogenesis and utilized as an energy source. Inuit studied in the 1970s were found to have abnormally large livers, presumably to assist in this process. Their urine volumes were also high, a result of the excess urea produced by gluconeogenesis.
http://en.wikipedia.org/wiki/Inuit_diet#Nutrition
It looks like they've physically adapted to a low-carb life. That's kind of fascinating.
My comments on the Inuit since i live in their backyard and actually do work in their villages. They stock pile meat and fish underground typically (like a natural meat locker). They also use smoke houses and smoke a lot of their meat and fish to preserve during the winter. They also collect a crap load of berries and freeze them as well. They have used these underground storage for many many years. I have been inside one that was used for 30 years or so.
Coastal villages eat a lot more whale and seal then fish unless they live on the mouth of a river. They preserve the seal oil from the seal meat and use it like ketchup. They also eat food that ferments as well, Stinky-head is an example. Fish heads are cut up and buries (typically in sand) and let to ferment for a period of time and then dug up and used to make soup.
Th inuits are very crafty and have learned how to make food last over winters well before power ever made it out to them. They hunt during the winters for polar bears, moose and caribou. Hunter regulations have harmed them significantly for winter sources of food.
Just wanted to throw out some information.0 -
The thread is long gone... might as well discuss...
I'm all out of .gifs.
0 -
Some misinformation there. The initial stages of low carb is the transition to ketones and the fogginess is normal, which disappears after a few weeks.http://www.medicalnewstoday.com/articles/180858.php
Ketosis is a condition in which levels of ketones (ketone bodies) in the blood are elevated. Ketones are formed when glycogen stores in the liver have run out.
The ketones - acetoacetate and β-hydroxybutyrate - are used for energy. Ketones are small carbon fragments that are the fuel created by the breakdown of fat stores. Ketosis is potentially a serious condition if keytone levels go too high.
However, when the body is in ketosis the individual tends to feel less hungry, and will probably eat less than he/she might otherwise do. The body switches from being a carbohydrate-burning organism into a fat-burning one. The fat stores become a primary energy source, and the person loses weight. That is why low-carb diets have become popular, and effective, especially among obese people.
The modern human body in most societies usually metabolizes glucose from carbohydrates for energy purposes, rather than energy from fat. If there is not enough glucose (from carbohydrates) in the bloodstream the body draws on fat stores for fuel, causing the appearance of ketones in the blood. Ketones are produced by the liver from fatty acids.
We need proteins and fats for building and repairing tissue and cells - proteins and fats can also be sources of energy. If necessary, the body can get all its energy from fats and proteins.
Our brain can use glucose or ketones for energy; it cannot generally burn fat for energy. A study carried out at the Psychology Department of Tufts University in Medford, Massachusetts found that women on low- or zero-carb diets performed worse in memory or thinking tests than women whose diets were not low in carbs.
When there are plenty of carbohydrates in the body, it breaks them down into glucose, which is then converted into energy and transported into the cells of our body.
If glucose cannot be broken down, as may be the case if the insulin levels are too low, or if there is a lack of glucose, then the body has to break down stored fat and convert it into energy. Metabolizing fat raises blood ketone levels, leading to ketosis. Ketosis can occur with Type 1 diabetes (not enough insulin), alcoholism, starvation, and with a low-carb, high fat/protein diet.
Ketones consist of acetone, acetoacetate or beta-hydroxybutyrate. Very high ketone levels can be toxic, making the blood more acid, and may damage such organs as the kidneys and liver.
The human body tries to lower acetone (a ketone) levels by breathing it out, causing a sweet and fruity breath. We also reduce keytone levels by expelling them through our urine.
Here's the result of that study.Low Carb Diet Is Bad For Thinking And Memory
Thursday 11 December 2008 - 11am PST
Nutrition / Diet
Neurology / Neuroscience
Psychology / Psychiatry
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Current ratings for:
Low Carb Diet Is Bad For Thinking And Memory
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25 ratings
Health Professionals:
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11 ratings
A new study from scientists in the US found that when women went on low or zero-carb diets they performed worse on thinking and memory tests compared to reducing calories without reducing carbohydrates. When they put carbs back into their diet, their thinking and memory skills went back to normal.
The study was the work of researchers from the psychology department of Tufts University in Medford, Massachusetts. It is published in the February 2009 journal Appetite and is already available to view online.
Dr Holly Taylor, professor of psychology at Tufts and corresponding author of the study, said the findings showed that:
"The food you eat can have an immediate impact on cognitive behavior."
"The popular low-carb, no-carb diets have the strongest potential for negative impact on thinking and cognition," she added.
Taylor's co-authors and research colleagues were Professor Robin Kanarek, former undergraduate Kara Watts and research associate Kristen D'Anci.
Our brain cells need glucose to work, but they have no way of storing it so they rely on a continuous supply via the bloodstream. The researchers had a hunch that reducing carbohydrate intake would reduce the body's ability to keep the brain supplied with glucose and therefore affect cognition, since glucose comes from breaking down carbohydrates.
For the study, Taylor and colleagues recruited 19 women aged 22 to 55 and let them each choose to go on either a low carb or low calorie diet as recommended by the American Dietetic Association. Nine of them chose the low carb diet and the other 10 chose the low calorie diet.
Altogether the participants attended five assessment sessions. Session 1 was just before they started on their chosen diet, sessions 2 and 3 were during the first week of dieting (when the low-carb dieters eliminated carbohydrates), and sessions 4 and 5 were in weeks 2 and 3, after the low-carb dieters started eating carbohydrates again.
During the assessment sessions the dieters performed a range of tests that measured attention, short and long term memory, visual attention and spatial memory. They also answered questions about how hungry they felt and their mood.
The results showed that:
Low carb dieters showed a gradual decrease on memory tasks compared with low-calorie dieters.
Reaction time for the low-carb dieters was slower, and their visual-spatial memory was not as good as that of the low-calorie dieters.
But low-carb dieters responded better than low-calorie dieters in the attention-vigilance tasks.
This last result is consistent with previous studies that found people on high protein or high fat diets showed short term improvements in attention.
Basically in low carb their memory was impared, but did better in doing tasks that required more attention and concentration. Also they said very high level of ketones can be toxic, well that's not correct. It's ketoacidosis that can be toxic and that happens in the absence of insulin.........our pH levels drop and it becomes a medical emergency. Alcoholics and type 1 diabetics could be in harms way, but the average person, pretty much negligible. A bit of a propoganda piece or maybe just repeating another article without editing.0 -
The thread is long gone... might as well discuss...
I'm all out of .gifs.
0 -
Some misinformation there. The initial stages of low carb is the transition to ketones and the fogginess is normal, which disappears after a few weeks.http://www.medicalnewstoday.com/articles/180858.php
Ketosis is a condition in which levels of ketones (ketone bodies) in the blood are elevated. Ketones are formed when glycogen stores in the liver have run out.
The ketones - acetoacetate and β-hydroxybutyrate - are used for energy. Ketones are small carbon fragments that are the fuel created by the breakdown of fat stores. Ketosis is potentially a serious condition if keytone levels go too high.
However, when the body is in ketosis the individual tends to feel less hungry, and will probably eat less than he/she might otherwise do. The body switches from being a carbohydrate-burning organism into a fat-burning one. The fat stores become a primary energy source, and the person loses weight. That is why low-carb diets have become popular, and effective, especially among obese people.
The modern human body in most societies usually metabolizes glucose from carbohydrates for energy purposes, rather than energy from fat. If there is not enough glucose (from carbohydrates) in the bloodstream the body draws on fat stores for fuel, causing the appearance of ketones in the blood. Ketones are produced by the liver from fatty acids.
We need proteins and fats for building and repairing tissue and cells - proteins and fats can also be sources of energy. If necessary, the body can get all its energy from fats and proteins.
Our brain can use glucose or ketones for energy; it cannot generally burn fat for energy. A study carried out at the Psychology Department of Tufts University in Medford, Massachusetts found that women on low- or zero-carb diets performed worse in memory or thinking tests than women whose diets were not low in carbs.
When there are plenty of carbohydrates in the body, it breaks them down into glucose, which is then converted into energy and transported into the cells of our body.
If glucose cannot be broken down, as may be the case if the insulin levels are too low, or if there is a lack of glucose, then the body has to break down stored fat and convert it into energy. Metabolizing fat raises blood ketone levels, leading to ketosis. Ketosis can occur with Type 1 diabetes (not enough insulin), alcoholism, starvation, and with a low-carb, high fat/protein diet.
Ketones consist of acetone, acetoacetate or beta-hydroxybutyrate. Very high ketone levels can be toxic, making the blood more acid, and may damage such organs as the kidneys and liver.
The human body tries to lower acetone (a ketone) levels by breathing it out, causing a sweet and fruity breath. We also reduce keytone levels by expelling them through our urine.
Here's the result of that study.Low Carb Diet Is Bad For Thinking And Memory
Thursday 11 December 2008 - 11am PST
Nutrition / Diet
Neurology / Neuroscience
Psychology / Psychiatry
add your opinion
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MNT Featured
Add your rating
Current ratings for:
Low Carb Diet Is Bad For Thinking And Memory
Public / Patient:
1 2 3 4 5
25 ratings
Health Professionals:
1 2 3 4 5
11 ratings
A new study from scientists in the US found that when women went on low or zero-carb diets they performed worse on thinking and memory tests compared to reducing calories without reducing carbohydrates. When they put carbs back into their diet, their thinking and memory skills went back to normal.
The study was the work of researchers from the psychology department of Tufts University in Medford, Massachusetts. It is published in the February 2009 journal Appetite and is already available to view online.
Dr Holly Taylor, professor of psychology at Tufts and corresponding author of the study, said the findings showed that:
"The food you eat can have an immediate impact on cognitive behavior."
"The popular low-carb, no-carb diets have the strongest potential for negative impact on thinking and cognition," she added.
Taylor's co-authors and research colleagues were Professor Robin Kanarek, former undergraduate Kara Watts and research associate Kristen D'Anci.
Our brain cells need glucose to work, but they have no way of storing it so they rely on a continuous supply via the bloodstream. The researchers had a hunch that reducing carbohydrate intake would reduce the body's ability to keep the brain supplied with glucose and therefore affect cognition, since glucose comes from breaking down carbohydrates.
For the study, Taylor and colleagues recruited 19 women aged 22 to 55 and let them each choose to go on either a low carb or low calorie diet as recommended by the American Dietetic Association. Nine of them chose the low carb diet and the other 10 chose the low calorie diet.
Altogether the participants attended five assessment sessions. Session 1 was just before they started on their chosen diet, sessions 2 and 3 were during the first week of dieting (when the low-carb dieters eliminated carbohydrates), and sessions 4 and 5 were in weeks 2 and 3, after the low-carb dieters started eating carbohydrates again.
During the assessment sessions the dieters performed a range of tests that measured attention, short and long term memory, visual attention and spatial memory. They also answered questions about how hungry they felt and their mood.
The results showed that:
Low carb dieters showed a gradual decrease on memory tasks compared with low-calorie dieters.
Reaction time for the low-carb dieters was slower, and their visual-spatial memory was not as good as that of the low-calorie dieters.
But low-carb dieters responded better than low-calorie dieters in the attention-vigilance tasks.
This last result is consistent with previous studies that found people on high protein or high fat diets showed short term improvements in attention.
Basically in low carb their memory was impared, but did better in doing tasks that required more attention and concentration. Also they said very high level of ketones can be toxic, well that's not correct. It's ketoacidosis that can be toxic and that happens in the absence of insulin.........our pH levels drop and it becomes a medical emergency. Alcoholics and type 1 diabetics could be in harms way, but the average person, pretty much negligible. A bit of a propoganda piece or maybe just repeating another article without editing.
But everything I read about ketosis states that as a risk:
http://www.webmd.com/diet/high-protein-low-carbohydrate-diets
What Are the Risks Linked to High Protein, Low-Carb Diets?
High protein, low-carb diets can cause a number of health problems, including:
- Kidney failure. Consuming too much protein puts a strain on the kidneys, which can make a person susceptible to kidney disease.
- High cholesterol . It is well known that high-protein diets (consisting of red meat, whole dairy products, and other high fat foods) are linked to high cholesterol. Studies have linked high cholesterol levels to an increased risk of developing heart disease, stroke, and cancer.
- Osteoporosis and kidney stones. High-protein diets have also been shown to cause people to excrete a large amount of calcium in their urine. Over a prolonged period of time, this can increase a person's risk of osteoporosis and kidney stones. A diet that increases protein at the expense of a very restrictive intake of plant carbohydrates may be bad for bones, but not necessarily a high-protein intake alone.
- Cancer. One of the reasons high-protein diets increase the risks of certain health problems is because of the avoidance of carbohydrate-containing foods and the vitamins, minerals, fiber, and antioxidants they contain. It is therefore important to obtain your protein from a diet rich in whole grains, fruits, and vegetables. Not only are your needs for protein being met, but you are also helping to reduce your risk of developing cancer.
- Unhealthy metabolic state (ketosis). Low-carb diets can cause your body to go into a dangerous metabolic state called ketosis since your body burns fat instead of glucose for energy. During ketosis, the body forms substances known as ketones, which can cause organs to fail and result in gout, kidney stones, or kidney failure. Ketones can also dull a person's appetite, cause nausea and bad breath. Ketosis can be prevented by eating at least 100 grams of carbohydrates a day.0 -
why the **** did this thread turn into a ketosis debate?
come the **** on people. jesus.0 -
Some misinformation there. The initial stages of low carb is the transition to ketones and the fogginess is normal, which disappears after a few weeks.http://www.medicalnewstoday.com/articles/180858.php
Ketosis is a condition in which levels of ketones (ketone bodies) in the blood are elevated. Ketones are formed when glycogen stores in the liver have run out.
The ketones - acetoacetate and β-hydroxybutyrate - are used for energy. Ketones are small carbon fragments that are the fuel created by the breakdown of fat stores. Ketosis is potentially a serious condition if keytone levels go too high.
However, when the body is in ketosis the individual tends to feel less hungry, and will probably eat less than he/she might otherwise do. The body switches from being a carbohydrate-burning organism into a fat-burning one. The fat stores become a primary energy source, and the person loses weight. That is why low-carb diets have become popular, and effective, especially among obese people.
The modern human body in most societies usually metabolizes glucose from carbohydrates for energy purposes, rather than energy from fat. If there is not enough glucose (from carbohydrates) in the bloodstream the body draws on fat stores for fuel, causing the appearance of ketones in the blood. Ketones are produced by the liver from fatty acids.
We need proteins and fats for building and repairing tissue and cells - proteins and fats can also be sources of energy. If necessary, the body can get all its energy from fats and proteins.
Our brain can use glucose or ketones for energy; it cannot generally burn fat for energy. A study carried out at the Psychology Department of Tufts University in Medford, Massachusetts found that women on low- or zero-carb diets performed worse in memory or thinking tests than women whose diets were not low in carbs.
When there are plenty of carbohydrates in the body, it breaks them down into glucose, which is then converted into energy and transported into the cells of our body.
If glucose cannot be broken down, as may be the case if the insulin levels are too low, or if there is a lack of glucose, then the body has to break down stored fat and convert it into energy. Metabolizing fat raises blood ketone levels, leading to ketosis. Ketosis can occur with Type 1 diabetes (not enough insulin), alcoholism, starvation, and with a low-carb, high fat/protein diet.
Ketones consist of acetone, acetoacetate or beta-hydroxybutyrate. Very high ketone levels can be toxic, making the blood more acid, and may damage such organs as the kidneys and liver.
The human body tries to lower acetone (a ketone) levels by breathing it out, causing a sweet and fruity breath. We also reduce keytone levels by expelling them through our urine.
Here's the result of that study.Low Carb Diet Is Bad For Thinking And Memory
Thursday 11 December 2008 - 11am PST
Nutrition / Diet
Neurology / Neuroscience
Psychology / Psychiatry
add your opinion
email
MNT Featured
Add your rating
Current ratings for:
Low Carb Diet Is Bad For Thinking And Memory
Public / Patient:
1 2 3 4 5
25 ratings
Health Professionals:
1 2 3 4 5
11 ratings
A new study from scientists in the US found that when women went on low or zero-carb diets they performed worse on thinking and memory tests compared to reducing calories without reducing carbohydrates. When they put carbs back into their diet, their thinking and memory skills went back to normal.
The study was the work of researchers from the psychology department of Tufts University in Medford, Massachusetts. It is published in the February 2009 journal Appetite and is already available to view online.
Dr Holly Taylor, professor of psychology at Tufts and corresponding author of the study, said the findings showed that:
"The food you eat can have an immediate impact on cognitive behavior."
"The popular low-carb, no-carb diets have the strongest potential for negative impact on thinking and cognition," she added.
Taylor's co-authors and research colleagues were Professor Robin Kanarek, former undergraduate Kara Watts and research associate Kristen D'Anci.
Our brain cells need glucose to work, but they have no way of storing it so they rely on a continuous supply via the bloodstream. The researchers had a hunch that reducing carbohydrate intake would reduce the body's ability to keep the brain supplied with glucose and therefore affect cognition, since glucose comes from breaking down carbohydrates.
For the study, Taylor and colleagues recruited 19 women aged 22 to 55 and let them each choose to go on either a low carb or low calorie diet as recommended by the American Dietetic Association. Nine of them chose the low carb diet and the other 10 chose the low calorie diet.
Altogether the participants attended five assessment sessions. Session 1 was just before they started on their chosen diet, sessions 2 and 3 were during the first week of dieting (when the low-carb dieters eliminated carbohydrates), and sessions 4 and 5 were in weeks 2 and 3, after the low-carb dieters started eating carbohydrates again.
During the assessment sessions the dieters performed a range of tests that measured attention, short and long term memory, visual attention and spatial memory. They also answered questions about how hungry they felt and their mood.
The results showed that:
Low carb dieters showed a gradual decrease on memory tasks compared with low-calorie dieters.
Reaction time for the low-carb dieters was slower, and their visual-spatial memory was not as good as that of the low-calorie dieters.
But low-carb dieters responded better than low-calorie dieters in the attention-vigilance tasks.
This last result is consistent with previous studies that found people on high protein or high fat diets showed short term improvements in attention.
Basically in low carb their memory was impared, but did better in doing tasks that required more attention and concentration. Also they said very high level of ketones can be toxic, well that's not correct. It's ketoacidosis that can be toxic and that happens in the absence of insulin.........our pH levels drop and it becomes a medical emergency. Alcoholics and type 1 diabetics could be in harms way, but the average person, pretty much negligible. A bit of a propoganda piece or maybe just repeating another article without editing.
But everything I read about ketosis states that as a risk:
http://www.webmd.com/diet/high-protein-low-carbohydrate-diets
What Are the Risks Linked to High Protein, Low-Carb Diets?
High protein, low-carb diets can cause a number of health problems, including:
- Kidney failure. Consuming too much protein puts a strain on the kidneys, which can make a person susceptible to kidney disease.
- High cholesterol . It is well known that high-protein diets (consisting of red meat, whole dairy products, and other high fat foods) are linked to high cholesterol. Studies have linked high cholesterol levels to an increased risk of developing heart disease, stroke, and cancer.
- Osteoporosis and kidney stones. High-protein diets have also been shown to cause people to excrete a large amount of calcium in their urine. Over a prolonged period of time, this can increase a person's risk of osteoporosis and kidney stones. A diet that increases protein at the expense of a very restrictive intake of plant carbohydrates may be bad for bones, but not necessarily a high-protein intake alone.
- Cancer. One of the reasons high-protein diets increase the risks of certain health problems is because of the avoidance of carbohydrate-containing foods and the vitamins, minerals, fiber, and antioxidants they contain. It is therefore important to obtain your protein from a diet rich in whole grains, fruits, and vegetables. Not only are your needs for protein being met, but you are also helping to reduce your risk of developing cancer.
- Unhealthy metabolic state (ketosis). Low-carb diets can cause your body to go into a dangerous metabolic state called ketosis since your body burns fat instead of glucose for energy. During ketosis, the body forms substances known as ketones, which can cause organs to fail and result in gout, kidney stones, or kidney failure. Ketones can also dull a person's appetite, cause nausea and bad breath. Ketosis can be prevented by eating at least 100 grams of carbohydrates a day.
Because you are using WebMD as a credible reference. They are nothing but paid by Corporate sponsorships.0 -
Some misinformation there. The initial stages of low carb is the transition to ketones and the fogginess is normal, which disappears after a few weeks.http://www.medicalnewstoday.com/articles/180858.php
Ketosis is a condition in which levels of ketones (ketone bodies) in the blood are elevated. Ketones are formed when glycogen stores in the liver have run out.
The ketones - acetoacetate and β-hydroxybutyrate - are used for energy. Ketones are small carbon fragments that are the fuel created by the breakdown of fat stores. Ketosis is potentially a serious condition if keytone levels go too high.
However, when the body is in ketosis the individual tends to feel less hungry, and will probably eat less than he/she might otherwise do. The body switches from being a carbohydrate-burning organism into a fat-burning one. The fat stores become a primary energy source, and the person loses weight. That is why low-carb diets have become popular, and effective, especially among obese people.
The modern human body in most societies usually metabolizes glucose from carbohydrates for energy purposes, rather than energy from fat. If there is not enough glucose (from carbohydrates) in the bloodstream the body draws on fat stores for fuel, causing the appearance of ketones in the blood. Ketones are produced by the liver from fatty acids.
We need proteins and fats for building and repairing tissue and cells - proteins and fats can also be sources of energy. If necessary, the body can get all its energy from fats and proteins.
Our brain can use glucose or ketones for energy; it cannot generally burn fat for energy. A study carried out at the Psychology Department of Tufts University in Medford, Massachusetts found that women on low- or zero-carb diets performed worse in memory or thinking tests than women whose diets were not low in carbs.
When there are plenty of carbohydrates in the body, it breaks them down into glucose, which is then converted into energy and transported into the cells of our body.
If glucose cannot be broken down, as may be the case if the insulin levels are too low, or if there is a lack of glucose, then the body has to break down stored fat and convert it into energy. Metabolizing fat raises blood ketone levels, leading to ketosis. Ketosis can occur with Type 1 diabetes (not enough insulin), alcoholism, starvation, and with a low-carb, high fat/protein diet.
Ketones consist of acetone, acetoacetate or beta-hydroxybutyrate. Very high ketone levels can be toxic, making the blood more acid, and may damage such organs as the kidneys and liver.
The human body tries to lower acetone (a ketone) levels by breathing it out, causing a sweet and fruity breath. We also reduce keytone levels by expelling them through our urine.
Here's the result of that study.Low Carb Diet Is Bad For Thinking And Memory
Thursday 11 December 2008 - 11am PST
Nutrition / Diet
Neurology / Neuroscience
Psychology / Psychiatry
add your opinion
email
MNT Featured
Add your rating
Current ratings for:
Low Carb Diet Is Bad For Thinking And Memory
Public / Patient:
1 2 3 4 5
25 ratings
Health Professionals:
1 2 3 4 5
11 ratings
A new study from scientists in the US found that when women went on low or zero-carb diets they performed worse on thinking and memory tests compared to reducing calories without reducing carbohydrates. When they put carbs back into their diet, their thinking and memory skills went back to normal.
The study was the work of researchers from the psychology department of Tufts University in Medford, Massachusetts. It is published in the February 2009 journal Appetite and is already available to view online.
Dr Holly Taylor, professor of psychology at Tufts and corresponding author of the study, said the findings showed that:
"The food you eat can have an immediate impact on cognitive behavior."
"The popular low-carb, no-carb diets have the strongest potential for negative impact on thinking and cognition," she added.
Taylor's co-authors and research colleagues were Professor Robin Kanarek, former undergraduate Kara Watts and research associate Kristen D'Anci.
Our brain cells need glucose to work, but they have no way of storing it so they rely on a continuous supply via the bloodstream. The researchers had a hunch that reducing carbohydrate intake would reduce the body's ability to keep the brain supplied with glucose and therefore affect cognition, since glucose comes from breaking down carbohydrates.
For the study, Taylor and colleagues recruited 19 women aged 22 to 55 and let them each choose to go on either a low carb or low calorie diet as recommended by the American Dietetic Association. Nine of them chose the low carb diet and the other 10 chose the low calorie diet.
Altogether the participants attended five assessment sessions. Session 1 was just before they started on their chosen diet, sessions 2 and 3 were during the first week of dieting (when the low-carb dieters eliminated carbohydrates), and sessions 4 and 5 were in weeks 2 and 3, after the low-carb dieters started eating carbohydrates again.
During the assessment sessions the dieters performed a range of tests that measured attention, short and long term memory, visual attention and spatial memory. They also answered questions about how hungry they felt and their mood.
The results showed that:
Low carb dieters showed a gradual decrease on memory tasks compared with low-calorie dieters.
Reaction time for the low-carb dieters was slower, and their visual-spatial memory was not as good as that of the low-calorie dieters.
But low-carb dieters responded better than low-calorie dieters in the attention-vigilance tasks.
This last result is consistent with previous studies that found people on high protein or high fat diets showed short term improvements in attention.
Basically in low carb their memory was impared, but did better in doing tasks that required more attention and concentration. Also they said very high level of ketones can be toxic, well that's not correct. It's ketoacidosis that can be toxic and that happens in the absence of insulin.........our pH levels drop and it becomes a medical emergency. Alcoholics and type 1 diabetics could be in harms way, but the average person, pretty much negligible. A bit of a propoganda piece or maybe just repeating another article without editing.
When I first read that, I was a little surprised that they didn't take into account (or didn't appear to) the shift from moderate/high carb to low/zero carb diets. That shift is usually pretty rough on a lot of people -- some even call it the "low-carb flu" -- until the body shifts in to more efficient ketosis to supply energy needs. But, then I saw she was a professor of PSYCHOLOGY and thought, "well, that's less surprising..." I'm sure her colleagues in the biology and biochemistry departments had a good chuckle at that.0 -
Yup, just more misinformation basically. WebMD is pretty sketchy even though they have a name that sounds like it shouldn't be.
Some misinformation there. The initial stages of low carb is the transition to ketones and the fogginess is normal, which disappears after a few weeks.http://www.medicalnewstoday.com/articles/180858.php
Ketosis is a condition in which levels of ketones (ketone bodies) in the blood are elevated. Ketones are formed when glycogen stores in the liver have run out.
The ketones - acetoacetate and β-hydroxybutyrate - are used for energy. Ketones are small carbon fragments that are the fuel created by the breakdown of fat stores. Ketosis is potentially a serious condition if keytone levels go too high.
However, when the body is in ketosis the individual tends to feel less hungry, and will probably eat less than he/she might otherwise do. The body switches from being a carbohydrate-burning organism into a fat-burning one. The fat stores become a primary energy source, and the person loses weight. That is why low-carb diets have become popular, and effective, especially among obese people.
The modern human body in most societies usually metabolizes glucose from carbohydrates for energy purposes, rather than energy from fat. If there is not enough glucose (from carbohydrates) in the bloodstream the body draws on fat stores for fuel, causing the appearance of ketones in the blood. Ketones are produced by the liver from fatty acids.
We need proteins and fats for building and repairing tissue and cells - proteins and fats can also be sources of energy. If necessary, the body can get all its energy from fats and proteins.
Our brain can use glucose or ketones for energy; it cannot generally burn fat for energy. A study carried out at the Psychology Department of Tufts University in Medford, Massachusetts found that women on low- or zero-carb diets performed worse in memory or thinking tests than women whose diets were not low in carbs.
When there are plenty of carbohydrates in the body, it breaks them down into glucose, which is then converted into energy and transported into the cells of our body.
If glucose cannot be broken down, as may be the case if the insulin levels are too low, or if there is a lack of glucose, then the body has to break down stored fat and convert it into energy. Metabolizing fat raises blood ketone levels, leading to ketosis. Ketosis can occur with Type 1 diabetes (not enough insulin), alcoholism, starvation, and with a low-carb, high fat/protein diet.
Ketones consist of acetone, acetoacetate or beta-hydroxybutyrate. Very high ketone levels can be toxic, making the blood more acid, and may damage such organs as the kidneys and liver.
The human body tries to lower acetone (a ketone) levels by breathing it out, causing a sweet and fruity breath. We also reduce keytone levels by expelling them through our urine.
Here's the result of that study.Low Carb Diet Is Bad For Thinking And Memory
Thursday 11 December 2008 - 11am PST
Nutrition / Diet
Neurology / Neuroscience
Psychology / Psychiatry
add your opinion
email
MNT Featured
Add your rating
Current ratings for:
Low Carb Diet Is Bad For Thinking And Memory
Public / Patient:
1 2 3 4 5
25 ratings
Health Professionals:
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A new study from scientists in the US found that when women went on low or zero-carb diets they performed worse on thinking and memory tests compared to reducing calories without reducing carbohydrates. When they put carbs back into their diet, their thinking and memory skills went back to normal.
The study was the work of researchers from the psychology department of Tufts University in Medford, Massachusetts. It is published in the February 2009 journal Appetite and is already available to view online.
Dr Holly Taylor, professor of psychology at Tufts and corresponding author of the study, said the findings showed that:
"The food you eat can have an immediate impact on cognitive behavior."
"The popular low-carb, no-carb diets have the strongest potential for negative impact on thinking and cognition," she added.
Taylor's co-authors and research colleagues were Professor Robin Kanarek, former undergraduate Kara Watts and research associate Kristen D'Anci.
Our brain cells need glucose to work, but they have no way of storing it so they rely on a continuous supply via the bloodstream. The researchers had a hunch that reducing carbohydrate intake would reduce the body's ability to keep the brain supplied with glucose and therefore affect cognition, since glucose comes from breaking down carbohydrates.
For the study, Taylor and colleagues recruited 19 women aged 22 to 55 and let them each choose to go on either a low carb or low calorie diet as recommended by the American Dietetic Association. Nine of them chose the low carb diet and the other 10 chose the low calorie diet.
Altogether the participants attended five assessment sessions. Session 1 was just before they started on their chosen diet, sessions 2 and 3 were during the first week of dieting (when the low-carb dieters eliminated carbohydrates), and sessions 4 and 5 were in weeks 2 and 3, after the low-carb dieters started eating carbohydrates again.
During the assessment sessions the dieters performed a range of tests that measured attention, short and long term memory, visual attention and spatial memory. They also answered questions about how hungry they felt and their mood.
The results showed that:
Low carb dieters showed a gradual decrease on memory tasks compared with low-calorie dieters.
Reaction time for the low-carb dieters was slower, and their visual-spatial memory was not as good as that of the low-calorie dieters.
But low-carb dieters responded better than low-calorie dieters in the attention-vigilance tasks.
This last result is consistent with previous studies that found people on high protein or high fat diets showed short term improvements in attention.
Basically in low carb their memory was impared, but did better in doing tasks that required more attention and concentration. Also they said very high level of ketones can be toxic, well that's not correct. It's ketoacidosis that can be toxic and that happens in the absence of insulin.........our pH levels drop and it becomes a medical emergency. Alcoholics and type 1 diabetics could be in harms way, but the average person, pretty much negligible. A bit of a propoganda piece or maybe just repeating another article without editing.
But everything I read about ketosis states that as a risk:
http://www.webmd.com/diet/high-protein-low-carbohydrate-diets
What Are the Risks Linked to High Protein, Low-Carb Diets?
High protein, low-carb diets can cause a number of health problems, including:
- Kidney failure. Consuming too much protein puts a strain on the kidneys, which can make a person susceptible to kidney disease.
- High cholesterol . It is well known that high-protein diets (consisting of red meat, whole dairy products, and other high fat foods) are linked to high cholesterol. Studies have linked high cholesterol levels to an increased risk of developing heart disease, stroke, and cancer.
- Osteoporosis and kidney stones. High-protein diets have also been shown to cause people to excrete a large amount of calcium in their urine. Over a prolonged period of time, this can increase a person's risk of osteoporosis and kidney stones. A diet that increases protein at the expense of a very restrictive intake of plant carbohydrates may be bad for bones, but not necessarily a high-protein intake alone.
- Cancer. One of the reasons high-protein diets increase the risks of certain health problems is because of the avoidance of carbohydrate-containing foods and the vitamins, minerals, fiber, and antioxidants they contain. It is therefore important to obtain your protein from a diet rich in whole grains, fruits, and vegetables. Not only are your needs for protein being met, but you are also helping to reduce your risk of developing cancer.
- Unhealthy metabolic state (ketosis). Low-carb diets can cause your body to go into a dangerous metabolic state called ketosis since your body burns fat instead of glucose for energy. During ketosis, the body forms substances known as ketones, which can cause organs to fail and result in gout, kidney stones, or kidney failure. Ketones can also dull a person's appetite, cause nausea and bad breath. Ketosis can be prevented by eating at least 100 grams of carbohydrates a day.0 -
http://www.webmd.com/diet/high-protein-low-carbohydrate-diets
What Are the Risks Linked to High Protein, Low-Carb Diets?
High protein, low-carb diets can cause a number of health problems, including:
- Kidney failure. Consuming too much protein puts a strain on the kidneys, which can make a person susceptible to kidney disease.
- High cholesterol . It is well known that high-protein diets (consisting of red meat, whole dairy products, and other high fat foods) are linked to high cholesterol. Studies have linked high cholesterol levels to an increased risk of developing heart disease, stroke, and cancer.
- Osteoporosis and kidney stones. High-protein diets have also been shown to cause people to excrete a large amount of calcium in their urine. Over a prolonged period of time, this can increase a person's risk of osteoporosis and kidney stones. A diet that increases protein at the expense of a very restrictive intake of plant carbohydrates may be bad for bones, but not necessarily a high-protein intake alone.
- Cancer. One of the reasons high-protein diets increase the risks of certain health problems is because of the avoidance of carbohydrate-containing foods and the vitamins, minerals, fiber, and antioxidants they contain. It is therefore important to obtain your protein from a diet rich in whole grains, fruits, and vegetables. Not only are your needs for protein being met, but you are also helping to reduce your risk of developing cancer.
- Unhealthy metabolic state (ketosis). Low-carb diets can cause your body to go into a dangerous metabolic state called ketosis since your body burns fat instead of glucose for energy. During ketosis, the body forms substances known as ketones, which can cause organs to fail and result in gout, kidney stones, or kidney failure. Ketones can also dull a person's appetite, cause nausea and bad breath. Ketosis can be prevented by eating at least 100 grams of carbohydrates a day.
Some of that's true. The kidneys and liver in particular have to work harder so for people with issues in either of those organs, they're usually not encouraged to do a low-carb diet (same reason drinking can be more troublesome because it puts more pressure on the liver) unless closely monitored. I think the osteoporosis is sketchy at best and the cancer thing is pretty much true of any diet where you're not getting you're necessary vitamins, minerals, etc. And they know so little about so many types of cancers and their cause, that I doubt that's very helpful. I think the unhealthy metabolic state is total bunk.0 -
I know hard to phathom a thread not meeting your standards. Ketosis is very much a part of the paleo/primal lifestyle......why the **** did this thread turn into a ketosis debate?
come the **** on people. jesus.0 -
Because you are using WebMD as a credible reference. They are nothing but paid by Corporate sponsorships.
I'm not using them as a credible resource, just as an example of the prevalence of the information.0 -
oh i can fathom it, believe me, but I don't recall the OP asking about ketosis. color me crazy
I know hard to phathom a thread not meeting your standards. Ketosis is very much a part of the paleo/primal lifestyle......why the **** did this thread turn into a ketosis debate?
come the **** on people. jesus.0 -
I know hard to phathom a thread not meeting your standards. Ketosis is very much a part of the paleo/primal lifestyle......why the **** did this thread turn into a ketosis debate?
come the **** on people. jesus.
Not necessarily. It can be, but it doesn't have to be. Many opt for it that are looking to lose fat, weight or improve body comp, but it's certainly not necessary. Some eat plenty of carbs to not be in ketosis or close to it, but are still very much Paleo/Primal.
There oftentimes is a lot of overlap in those Venn Diagram circles, but they are completely separate circles nonetheless.0 -
Yes I know. Most guru's push the low end of the carb range, with insidious weight gain as a description of what can happen if we eat too many carbs....scary stuff.
I know hard to phathom a thread not meeting your standards. Ketosis is very much a part of the paleo/primal lifestyle......why the **** did this thread turn into a ketosis debate?
come the **** on people. jesus.
Not necessarily. It can be, but it doesn't have to be. Many opt for it that are looking to lose fat, weight or improve body comp, but it's certainly not necessary. Some eat plenty of carbs to not be in ketosis or close to it, but are still very much Paleo/Primal.
There oftentimes is a lot of overlap in those Venn Diagram circles, but they are completely separate circles nonetheless.0 -
Are you thinking of doing it just because of the GERD issue, or do you ave any other reasons? GERD is acid reflux issues, right? I really do not see how paleo would help with acid reflux….
^^ Yeah this.
Lifestyle choices that can contribute to GERD include:
Obesity
Smoking (active or passive)
High intake of table salt
Low dietary fibre
Low physical exercise
Medications, including drugs for asthma, calcium-channel blockers, antihistamines, painkillers, sedatives, and antidepressants.
None of that means "go paleo." :huh:
I am not obese, I do not smoke, i eat at least 30 grams of fiber daily & i exercise 5-6x week. The only medication I am on is birth control. However, i still get acid reflux. I wanted to try this paleo lifestyle for the health benefits of what others have said - getting rid of gerd, clearer skin, overall increased energy, better sleep (I wake frequently throughout the night), getting rid of migraines (which i frequently have) etc. i just wanted to know what other people have experienced who have actually followed this lifestyle, even if it was only for a month. back in college, for a long time my friend & i both thought i had Celiac Disease before it was even really big in the news & thought maybe I should cut out gluten or cut back on wheat, etc. i just thought paleo would help & wanted to get more feedback.0 -
Hunh.
This puts a few things together:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2716748/
Does anybody know the level of the journal (like, is the the go-to journal in the field? Or does it take experiments that don't have main effects, etc.?)0 -
lol.........you basically failed at your job then, is that what your saying. just kidding. Cheers.
oh i can fathom it, believe me, but I don't recall the OP asking about ketosis. color me crazy
I know hard to phathom a thread not meeting your standards. Ketosis is very much a part of the paleo/primal lifestyle......why the **** did this thread turn into a ketosis debate?
come the **** on people. jesus.0 -
Are you thinking of doing it just because of the GERD issue, or do you ave any other reasons? GERD is acid reflux issues, right? I really do not see how paleo would help with acid reflux….
^^ Yeah this.
Lifestyle choices that can contribute to GERD include:
Obesity
Smoking (active or passive)
High intake of table salt
Low dietary fibre
Low physical exercise
Medications, including drugs for asthma, calcium-channel blockers, antihistamines, painkillers, sedatives, and antidepressants.
None of that means "go paleo." :huh:
I am not obese, I do not smoke, i eat at least 30 grams of fiber daily & i exercise 5-6x week. The only medication I am on is birth control. However, i still get acid reflux. I wanted to try this paleo lifestyle for the health benefits of what others have said - getting rid of gerd, clearer skin, overall increased energy, better sleep (I wake frequently throughout the night), getting rid of migraines (which i frequently have) etc. i just wanted to know what other people have experienced who have actually followed this lifestyle, even if it was only for a month. back in college, for a long time my friend & i both thought i had Celiac Disease before it was even really big in the news & thought maybe I should cut out gluten or cut back on wheat, etc. i just thought paleo would help & wanted to get more feedback.
scary to come back to topic and see what happened to it?0 -
I am not obese, I do not smoke, i eat at least 30 grams of fiber daily & i exercise 5-6x week. The only medication I am on is birth control. However, i still get acid reflux. I wanted to try this paleo lifestyle for the health benefits of what others have said - getting rid of gerd, clearer skin, overall increased energy, better sleep (I wake frequently throughout the night), getting rid of migraines (which i frequently have) etc. i just wanted to know what other people have experienced who have actually followed this lifestyle, even if it was only for a month. back in college, for a long time my friend & i both thought i had Celiac Disease before it was even really big in the news & thought maybe I should cut out gluten or cut back on wheat, etc. i just thought paleo would help & wanted to get more feedback.
This was me too... well... not the birth control part
Great shape, young, otherwise 100% healthy but I had crazy bouts of GERD and LPR.
I think it really may behoove you to at least see what happens if you cut out grains for a month. That didn't work for me, so it was clearly issues with my stomach function, but if it works for you at least then you'll know. Sadly because of the lack of knowledge MDs have in the field, we're sort of left to our own devices when it comes to treating this thing.
Good luck
0 -
Not really, it's takes 1.6g's of protein to be converted to 1g of glucose and if no food whatsoever is consumed then lean mass is required for function. the egg protein did it's job in this scenario. i would have to look at trained people, but I would suspect that the only extra afford would be a higher consumption of protein to help stay in nitrogen balance, but I'm not sure.When enough protein is consumed, gluconeogenesis can supply all the glucose the body requires while still maintaining lean body mass.
http://www.ncbi.nlm.nih.gov/pubmed/7351177
The subjects were both sedentary and obese.
People in that condition can eat not only zero carb, but zero protein and zero fat and still be fine.
I believe protein turnover in an active (or starving) person can be up to 150 g per day. ~30 g is a standard minimum needed for maintaining protein due to the bodies normal turnover.0 -
gluconeogenesis. We don't need carbs to survive. The body can create glucose from protein and fat. And as far as I know the inuits survived on a diet that was practically zero carbP.S - There is NO physiological NEED for carbs in the human diet. We don't need them to survive.
I would not be so sure of that...
I am positively, 1000000% sure. We do not need carbs in the human diet. The body can convert everything we need to function just fine and survive on proteins and fats alone.
Carbs are merely a quicker energy source than fat is. But, there is no need for us to eat them at all.0 -
Are you thinking of doing it just because of the GERD issue, or do you ave any other reasons? GERD is acid reflux issues, right? I really do not see how paleo would help with acid reflux….
^^ Yeah this.
Lifestyle choices that can contribute to GERD include:
Obesity
Smoking (active or passive)
High intake of table salt
Low dietary fibre
Low physical exercise
Medications, including drugs for asthma, calcium-channel blockers, antihistamines, painkillers, sedatives, and antidepressants.
None of that means "go paleo." :huh:
I am not obese, I do not smoke, i eat at least 30 grams of fiber daily & i exercise 5-6x week. The only medication I am on is birth control. However, i still get acid reflux. I wanted to try this paleo lifestyle for the health benefits of what others have said - getting rid of gerd, clearer skin, overall increased energy, better sleep (I wake frequently throughout the night), getting rid of migraines (which i frequently have) etc. i just wanted to know what other people have experienced who have actually followed this lifestyle, even if it was only for a month. back in college, for a long time my friend & i both thought i had Celiac Disease before it was even really big in the news & thought maybe I should cut out gluten or cut back on wheat, etc. i just thought paleo would help & wanted to get more feedback.
Give it a try and see how you feel. You sound very much like my fiance (except he's now given up smoking). He didn't have major digestive issues, but he had some and just feels much better on Primal. He also has always had bad skin (now in his mid-30s) and it looks like it may have been milk the whole time. He's still experimenting with what is exactly causing the reaction, but when he was strictly paleo, it cleared considerably. Not 100%, but probably 90-95%. He was shocked, especially after years of trying also sorts of skin stuff. So, something in his previous diet was doing it.0 -
gluconeogenesis. We don't need carbs to survive. The body can create glucose from protein and fat. And as far as I know the inuits survived on a diet that was practically zero carbP.S - There is NO physiological NEED for carbs in the human diet. We don't need them to survive.
I would not be so sure of that...
I am positively, 1000000% sure. We do not need carbs in the human diet. The body can convert everything we need to function just fine and survive on proteins and fats alone.
Carbs are merely a quicker energy source than fat is. But, there is no need for us to eat them at all.
Not quite - they get carbs through the summer and have dried berries/roots/etc through the winter. And they physically adapted to processing protein with larger livers. I'm not sure that I'd recommend cutting out a macro-nutrient if there is no health reasons behind it, but I'm learning 0 -
I agree, carbs are tasty and if someone isn't worried medically about carbs then I see no reason to not eat them. I'm making home made fish and chips tonight....
gluconeogenesis. We don't need carbs to survive. The body can create glucose from protein and fat. And as far as I know the inuits survived on a diet that was practically zero carbP.S - There is NO physiological NEED for carbs in the human diet. We don't need them to survive.
I would not be so sure of that...
I am positively, 1000000% sure. We do not need carbs in the human diet. The body can convert everything we need to function just fine and survive on proteins and fats alone.
Carbs are merely a quicker energy source than fat is. But, there is no need for us to eat them at all.
Not quite - they get carbs through the summer and have dried berries/roots/etc through the winter. And they physically adapted to processing protein with larger livers. I'm not sure that I'd recommend cutting out a macro-nutrient if there is no health reasons behind it, but I'm learning0 -
Are you thinking of doing it just because of the GERD issue, or do you ave any other reasons? GERD is acid reflux issues, right? I really do not see how paleo would help with acid reflux….
^^ Yeah this.
Lifestyle choices that can contribute to GERD include:
Obesity
Smoking (active or passive)
High intake of table salt
Low dietary fibre
Low physical exercise
Medications, including drugs for asthma, calcium-channel blockers, antihistamines, painkillers, sedatives, and antidepressants.
None of that means "go paleo." :huh:
I am not obese, I do not smoke, i eat at least 30 grams of fiber daily & i exercise 5-6x week. The only medication I am on is birth control. However, i still get acid reflux. I wanted to try this paleo lifestyle for the health benefits of what others have said - getting rid of gerd, clearer skin, overall increased energy, better sleep (I wake frequently throughout the night), getting rid of migraines (which i frequently have) etc. i just wanted to know what other people have experienced who have actually followed this lifestyle, even if it was only for a month. back in college, for a long time my friend & i both thought i had Celiac Disease before it was even really big in the news & thought maybe I should cut out gluten or cut back on wheat, etc. i just thought paleo would help & wanted to get more feedback.
If you cut back on gluten, that's wheat, barley, rye and triticale. There are a lot of resources for gluten-free and paleo diets now.
I'd say you have to try it to see if it works for you. There's been many people on this thread that report glowing things about eliminating gluten/going paleo and then there's people it doesn't work for.
Even a diagnosis like GERD might result from different physical issues, so one person with it might benefit from a gluten-free diet and another might not.0 -
I will pop in to say, I had chronic headaches for years that just kept getting worse. Even with medications. I tried whole30 and then Paleo afterwards and my headaches are virtually gone. Also I have more energy and feel so much better eating this way. I truly didn't have huge problems giving up wheat/grains. And I ate them a lot. I enjoyed the choices I could have !0
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geez, I leave for a few hours and this thread has been totally derailed…how the hell did we go from…
- OP asking about Paloe and Gerd
- to grand standing and misinterpretation of posts...
- then to game of thrones
- then to low carb
- then to ketosis
- then OP came back …
would someone like to catch me up as to where the hell this thread is now..?0 -
geez, I leave for a few hours and this thread has been totally derailed…how the hell did we go from…
- OP asking about Paloe and Gerd
- to grand standing and misinterpretation of posts...
- then to game of thrones
- then to low carb
- then to ketosis
- then OP cam back …
would someone like to catch me up as to where the hell this thread is now..?
The OP came back, so we're answering her questions.0 -
Cutting back on grains won't give you the results of a Paleo lifestyle. Please don't be another person who thinks they can still eat everything usually excluded and then say "Paleo doesn't work". If your goal is to only lose weight and you still want to eat everything that you are currently eating, just eat at a calorie deficit. Eating whole foods, and minimizing processed foods, is a great idea though.
A keto Paleo lifestyle has worked wonders for my health. It's a permanent lifestyle for me. If it wasn't, it would be a FAIL.
Whatever suits you best and is sustainable for your entire life is the only lifestyle that will work for you.
Did you even read my original post? Nowhere did I mention that I want to do it for weight loss. Have you seen my profile picture? I do not need to lose weight. However, I have been reading about all of the health benefits of the paleo lifestyle & just wanted some more personal feedback from people who have actually tried the lifestyle & what their experience was.0
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