low carb diet has been debunked

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Replies

  • Posts: 9,532 Member
    edited August 2015
    lemurcat12 wrote: »

    Yep, in another thread MrKnight just claimed that under 200 was low carb for him.

    What Mr Knight claimed was that under 200g/day was low carb for any active, non-short male. And I'm not alone in that claim - when dieticians/"journalists" claim the Lakers basketball team has gone "low carb", they're talking about 200-300g of carbs per day.

    My average exercise burn is ~700 cal/day, in 60 minutes. And those are real calories, not MFP or HRM magical unicorn fart calories (so 1000+ per day, using MFP-like numbers). Impossible to support that level of output every day without eating bunches of carbs.

    If I went slower and stretched it out to 3-4 hours - yes, it would be possible because the power output drops down to what is supportable by fat mobilization.
  • Posts: 1,030 Member
    I agree with Stephen Guyenet's assessment. Low carb diet wasn't what was debunked.

    "This study was designed to investigate a mechanism, namely that insulin levels are the dominant controller of fat mass. It was sufficiently long to reject that hypothesis. The carb-insulin hypothesis doesn't say anything about insulin not being relevant to adiposity for the first 6 days, then kicking in after that. At least, not any version of it I've encountered. This study was not about which diet leads to better results under real-world conditions. There are many other studies that have addressed that question."
    http://wholehealthsource.blogspot.ca/2015/08/a-new-human-trial-seriously-undermines.html

    Thanks for posting this more complete commentary on the studies findings.
  • Posts: 75 Member
    How many grams a day is considered low carb though?
  • Posts: 9,532 Member
    edited August 2015
    anneeett wrote: »
    How many grams a day is considered low carb though?

    It depends on what you're trying to achieve. Going for ketosis is a lot different than "minimal intake without physiological maladaptions". And it depends on context, especially activity level/type.
  • Posts: 5,864 Member
    Subscribing to read when I get in later, I just know from the first few posts this will be good lol!
  • Posts: 12,019 Member
    anneeett wrote: »
    How many grams a day is considered low carb though?

    Most low carb people consider under 100g of carbs per day as low carb. Many say 150g is low carb, especially if active. I've not yet talked with a low carber who says above 150g is low carb. Could be though.

    A ketogenic diet is usually under 50g of carbs, although many of us aim for 5% of our macros from carbs. For me, that is 20 something.
  • Posts: 261 Member
    I avoid excessive carbs for only one reason: the foods they are in are usually high in calories. I still eat bread and pasta and all that, but making them fit into my daily total is just not worth it a lot of times. A serving of tortellini, for example, is usually one cup, and I know that I'm not going to be able to stop at one cup.
  • Posts: 30,886 Member
    Mr_Knight wrote: »

    What Mr Knight claimed was that under 200g/day was low carb for any active, non-short male.

    Yes, I understood that. I didn't think you were claiming to have some special low carb number just for you.

    I don't personally think it makes sense to define "low carb" by "less than the SAD." I am undecided as to whether I think it ought to relate to some total number or to percentage of calories -- for once, I don't really care that much -- but I guess the percentage of calories method makes the most sense to me.

    So what percentage? Lower than is normally recommended, so under 45%? Calling the common 40-30-30 macro "low carb" seems absurd to me, but I'm open to argument. Under 30%, under 20%? I don't care, although to me the there is a serious difference between "lower carb" and "puts one consistently in ketosis."
    And I'm not alone in that claim - when dieticians/"journalists" claim the Lakers basketball team has gone "low carb", they're talking about 200-300g of carbs per day.

    Good point.
    My average exercise burn is ~700 cal/day, in 60 minutes. And those are real calories, not MFP or HRM magical unicorn fart calories (so 1000+ per day, using MFP-like numbers). Impossible to support that level of output every day without eating bunches of carbs.

    I'm not being critical of your carb consumption. I tend to agree with you.
  • Posts: 75 Member
    Mr_Knight wrote: »

    It depends on what you're trying to achieve. Going for ketosis is a lot different than "minimal intake without physiological maladaptions". And it depends on context, especially activity level/type.
    nvmomketo wrote: »

    Most low carb people consider under 100g of carbs per day as low carb. Many say 150g is low carb, especially if active. I've not yet talked with a low carber who says above 150g is low carb. Could be though.

    A ketogenic diet is usually under 50g of carbs, although many of us aim for 5% of our macros from carbs. For me, that is 20 something.

    Ah, thanks for the info! Jeez, under 50g of carbs.. I could never! LOL
  • Posts: 9,532 Member
    edited August 2015
    For a typical, lightly-active person, physiological changes (which may or may not be medically appropriate long term) start when carb intake is dropped to the 100-150g area, depending on size/genetics/etc.

    My definition of low carb is any level flirting with that threshold, once activity burns are accounted for.
  • Posts: 30,886 Member
    Mr_Knight wrote: »
    For a typical, lightly-active person, physiological changes (which may or may not be medically appropriate long term) start when carb intake is dropped to the 100-150g area, depending on size/genetics/etc.

    My definition of low carb is any level flirting with that threshold, once activity burns are accounted for.

    What physiological changes?

    I'm very active and eat around 150-200 (depending on whether I'm going for a deficit and how much I eat calories back, and I vary from day to day -- I pretty much allow myself to eat whatever amount of carbs/fat I feel like, although I tend to eat a higher carb (meaning balanced, including a starch) meal when it's the last meal I will have before a workout. Just curious if this is something I should be concerned about. I occasionally drop below 150 when cutting calories/not eating back exercise and am wondering if stuff I've been attributing to lower calories might be more carb-level-related.
  • Posts: 38,442 MFP Moderator
    Tagging go read later.
  • What I have learned from this thread is that I have been eating low carb and didn't know it. *shrug*
  • Posts: 733 Member
    edited August 2015
    It was clearly a *kitten* study; anybody can see that. It's great how y'all treat these issues like politics or religion and argue about them so vehemently. I love that!
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  • Posts: 38,442 MFP Moderator
    It was clearly a *kitten* study; anybody can see that. It's great how y'all treat these issues like politics or religion and argue about them so vehemently. I love that!
    You clearly did read the study or understandthe context of what they were doing a study on.
  • Posts: 12,019 Member
    lemurcat12 wrote: »

    Yes, I understood that. I didn't think you were claiming to have some special low carb number just for you.

    I don't personally think it makes sense to define "low carb" by "less than the SAD." I am undecided as to whether I think it ought to relate to some total number or to percentage of calories -- for once, I don't really care that much -- but I guess the percentage of calories method makes the most sense to me.

    So what percentage? Lower than is normally recommended, so under 45%? Calling the common 40-30-30 macro "low carb" seems absurd to me, but I'm open to argument. Under 30%, under 20%? I don't care, although to me the there is a serious difference between "lower carb" and "puts one consistently in ketosis."

    I think 40C / 30P / 30F is the Zone diet... I think.

    Most low carbers seem to call those in ketosis as very LCHF (vLCHF).
  • Posts: 38,442 MFP Moderator
    nvmomketo wrote: »

    I think 40C / 30P / 30F is the Zone diet... I think.

    Most low carbers seem to call those in ketosis as very LCHF (vLCHF).

    You are correct, that is a zone diet.
  • Posts: 9,532 Member
    The Zone Diet is typically classified as low-carb.
  • Posts: 12,019 Member
    Mr_Knight wrote: »
    The Zone Diet is typically classified as low-carb.

    Really? Huh. I did not know that... 40% is considered low carb?
  • Posts: 4,301 Member
    nvmomketo wrote: »

    Really? Huh. I did not know that... 40% is considered low carb?

    The Zone Diet is 40% and a review is provided with this link

    http://health.usnews.com/best-diet/zone-diet/reviews

    It didn't score very high, maybe in the bottom third of the 30 plus diets reviewed. It scored higher then the Paleo diet though. I think the Paleo was listed in the bottom 3.
  • Unknown
    edited August 2015
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  • Posts: 30,886 Member
    nvmomketo wrote: »

    I think 40C / 30P / 30F is the Zone diet... I think.

    The Zone diet isn't just 40-30-30, but the idea that you should make every meal in those ratios.

    40-30-30 is a really common ratio beyond Zone. (It's what I currently like also, not that that matters.) ;-)
  • Posts: 12,942 Member
    kkenseth wrote: »

    So, back to the 1970s. Got it.

    I remember the Susan Powter era in the 80's when she said fat made you fat, not food. I remember always being hungry when I ate low fat, and I also gained lots of weight. Now that I eat a balance of macros, I'm not starving.
  • Posts: 733 Member
    edited August 2015
    shell1005 wrote: »

    There are hundreds and hundreds of other threads out there on the forums if the intense debate and discussion bothers you so deeply. Self care.

    lol, go get em, tiger! Preach it, sistah.

  • Posts: 12,019 Member
    SLLRunner wrote: »

    I remember the Susan Powter era in the 80's when she said fat made you fat, not food. I remember always being hungry when I ate low fat, and I also gained lots of weight. Now that I eat a balance of macros, I'm not starving.

    I completely bought into that. I remember discussing with someone how a solid fat like butter or marbling in meat would end up solid in your arteries. Sheesh. Oh, and I remember skipping butter on toast and just going with jam, where as no I think the butter is probably the most nutritious part. LOL
  • Posts: 843 Member
    edited August 2015
    minties82 wrote: »

    I sure as hell hope not, I've lost 80lbs so far this year.

    I don't low-carb....well, not intentionally...but can i recall the 80 you lost and 50 i lost and then give it to a girl i hate? (here's the pettiness coming out, lol)
  • Posts: 4,301 Member

    Can i reca
    I don't low-carb....well, not intentionally...but can i recall the 80 you lost and 50 i lost and then give it to a girl i hate? (here's the pettiness coming out, lol)

    Not sure this is relevant but you have kitten legs growing from your forearm. If this is a result of your diet?!?<> maybe cease eating tuna?!? IDK.

  • Posts: 843 Member
    _Terrapin_ wrote: »

    Not sure this is relevant but you have kitten legs growing from your forearm. If this is a result of your diet?!?<> maybe cease eating tuna?!? IDK.

    I HATE tuna.

    The whole picture has most of a cat....there's a whole cat somewhere..but you know, i could use some extra legs on my arms.
  • Posts: 843 Member
    Honestly, I'm only here right now because I'm waiting for a friend to get here so we can go to the club, and uhhhh, I've been drinking for 2 hours. Hmm.
This discussion has been closed.