Kcal vs. protein (was: [Re: Which calories?])

[Guest guest]

Hi Willie:

This part is interesting:

" ......... but the calorie restriction did not produce as much life

extension when the diets had a high fat or high protein content as it

did when the diet had a very high proportion of carbohydrates "

because it seems to be consistent with the fruit fly study where

restriction of carbohydrates didn't make much difference.

But is it the fat or the protein that matters?

Rodney.

> Hi all,

>

> Here you have a reference that points just in another direction

> regarding the issue of calories from carbs or protein. Of course,

> one have to have in mind this strain of mice had a renal disease,

> but it's worth reading it

>

> http://www.pnas.org/cgi/reprint/83/15/5659

>

> Take a look at this extract:

>

> " It was also of interest that the diet that promoted the very

> longest life and the greatest increase in maximum life span in

> these relatively short-lived mice was the diet of very high

> carbohydrate, low fat, normal protein composition. However,

> this diet exhibited the greatly beneficial effect only when

> fed as a calorie-restricted diet. The diets higher in fat and

> higher in protein permitted the increasing of longevity and life

> span when fed in restricted amounts, but the calorie restriction

> did not produce as much life extension when the diets

> had a high fat or high protein content as it did when the diet

> had a very high proportion of carbohydrates. "

>

> Cheers.

> Willie.