Re: Re: Desirable Protein Intake toxic byproducts

[Guest guest]

Hi Logan,

About toxic byproducts of amino metabolism, humans seem to handle them as long as they're healthy, but my take is I just don't NEED them. Without trying to evaluate if they will "stress" the system or "strengthen" the system, I'd just like to find the "optimum" intake which the body needs. That is not easy. Even MNDH is not consistent, but I found one table that agrees with what I eat, so I use that one (ha).

BTW, I looked again at the new edition and I see no such data as was in the 8th ed, 1994. Data from the 1994 table is from Kishi, J NUTR, 108, 1978. Protein Nutrition and requirements of the elderly. Human Nutrition: A Comprehensive Treatise, vol 6, 1989 pp153-181 and Food and Nutrition Board, NRC: Protein and Amino acids: NAP, 1989, pp 52-77. If someone has access to those, maybe the table could be expanded. The number for protein per kg is 1.02 at 40 kcals/kg.

Sherman's equation has me eating 159 gms at 22.5 kcals/kg intake. Giving him the benefit of the doubt maybe it works for youngers at 125#, not for olders at 175#? looking at Dean's website he eats 110 gms vegan Protein, at 2014 kcals. He's 123.5# July1, 04.

http://deanpomerleau.tripod.com/Dean_regime/Dean_diet/meal.htm

So perhaps the equation is diff for vegans, too.

Regards.

----- Original Message -----

From: beneathremains

Sent: Friday, July 16, 2004 11:32 PM

Subject: [ ] Re: Desirable Protein Intake

I'm not particularly impressed by the "toxic metabolism byproducts" theory of aging, otherwise antioxidants would have been found to been correlated with extending maximum lifespan rather than gene expression. Antioxidants belong to the ON in CRON, not CR.Like Rodney, I do wish there were more CR studies specifically controlling for all the possible variables, especially macronutrient ratios and macronutrient types. But I think there is enough evidence now from paleoanthropology, diabetics and sports nutrition to give more credence to Rae's formula over the RDA. The absolute amount of protein may be much more important than the percentage as it will necessarily become a smaller percentage when the amount of carbohydrates/fat is increased. But theoretically, not everyone can maintain their lean muscle mass on just 130 grams of carbohydrates a day due to varying levels of physical activity, insulin resistance, biochemistry, et al.. If protein needs to be fixed, and carbohydrates need to be at least a minimum for the brain to function (and not waste the protein being converted into glucose), then only fat is left to be tweaked... and then, like Jeff says, there's no need to specifically add fat to the diet beyond EFA's.Logan