Theoretic question

mcbwhitney:
"Both eating purely fruit and veg or purely lard would land you in hospital if you did it for prolonged preiods of time."

Really, how silly of me - I think you just saved my life!!

Please, why post this?

If you were going to eat nothing but highly fatty foods to the value of 2000 calories, you'd be pretty damn hungry for starters, because food of that quality is usually lower in fibre and protein, and denser in calories. So you'd be eating less meals.

Secondly, if you had that much fat in your diet on a daily basis and wasn't working to burn it off or lose weight, some of it would be converted to glucose for energy, and most of it would be stored as fatty tissue, and also clog up your arteries causing cardiovascular disease in the long term (i.e heart attacks, embolisms, strokes).

Thirdly, you'd be malnourished (obviously). So you wouldn't feel healthy or energised, you'd feel sluggish from having to digest such fatty meals.

In summary, you would gain weight or at the least your body would recompose to have more fat deposites. Although you've stuck to the calories, you would have had more than your recommended daily intake of fat. Fat has higher calories per gram than carbs and protein.

If you were going to eat nothing but highly fatty foods to the value of 2000 calories, you'd be pretty damn hungry for starters, because food of that quality is usually lower in fibre and protein, and denser in calories. So you'd be eating less meals.

Secondly, if you had that much fat in your diet on a daily basis and wasn't working to burn it off or lose weight, some of it would be converted to glucose for energy, and most of it would be stored as fatty tissue, and also clog up your arteries causing cardiovascular disease in the long term (i.e heart attacks, embolisms, strokes).

Thirdly, you'd be malnourished (obviously). So you wouldn't feel healthy or energised, you'd feel sluggish from having to digest such fatty meals.

In summary, you would gain weight or at the least your body would recompose to have more fat deposites. Although you've stuck to the calories, you would have had more than your recommended daily intake of fat. Fat has higher calories per gram than carbs and protein.

Fat does not fill your glycogen stores, carbs do.

Both eating purely fruit and veg or purely lard would land you in hospital if you did it for prolonged preiods of time.

I disagree. Fruit and veg have all three macros within their matrix, lard has only 1, fat.

which vegetables have fat?

Both eating purely fruit and veg or purely lard would land you in hospital if you did it for prolonged preiods of time.

I disagree. Fruit and veg have all three macros within their matrix, lard has only 1, fat.

which vegetables have fat?

Show me one that doesn't contain fat. Small amounts count.

If we ignore the importance of macronutrients to your health, and think of calories only as a unit of energy, you would not experience any change in weight eating the same number of calories from different macronutrient ratios.

But, with an extremely low protein intake, your body will catabolize protein-rich tissues. The body stores fat but only stores protein as muscle - there is no bodily repository for excess protein. Thus, very quickly, your body would begin consuming itself.

With an extremely low (and prolonged) carbohydrate intake, links have been shown to complications such as heart arrhythmia, cardiac contractile function impairment, sudden death, osteoporosis, kidney damage, increased cancer risk, impairment of physical activity and lipid abnormalities.

So ignoring these adverse health effects, a calorie is a calorie. These health complications illustrate that normal and predictable healthy bodily functions break down when one eliminates macronutrients from the diet. So while it's possible your body will utilize fat for sustenance and store the excess, your weight may be static as the body catabolizes other tissues, consumes muscle glycogen stores, etc.