best protein?

[babettegriffin 0]

For weight loss and muscle building, which is best, soy or whey?

Thanks

[minimeme 1]

I have been told whey isolate. Bodybuilding articles/sites seem to argue the two a lot, most side with whey and still others claim soy. If you google, you will find lots of discussion on it.

[BetsyB 9]

Whey, by far. First, it's more bioavailable. Secondly, it doesn't affect thyroid function (soy can be a problem for many), and finally, it does not present the same high risk of allergy issues.

[minimeme 1]

Two of the areas that soy beats whey Protein in building muscle is glutamine and arginine. Otherwise, whey wins all other categories.

-Glutamine is a non-essential amino acid. Your body uses glutamine to transport nitrogen to your tissues.

Glutamine also increases muscle cell volume through cellular hydration. Glutamine supplementation also increases growth hormone levels, which leads to the muscle using fatty acids for fuel rather than blood sugar.

Those looking to build muscle should consume 3 to 5 grams of glutamine, 3 times per day.

-Arginine is a non-essential amino acid that helps ward off both mental and physical fatigue.

Arginine also helps to facilitate muscle growth through promoting the release of both growth hormone and insulin in the body during intense exercise such as bodybuilding.

Arginine has become popular recently due to its ability to produce nitric oxide, which increases blood flow, and thus delivers more nutrients to the muscles and promoting growth.

An additional benefit of arginine is that it may lower LDL cholesterol levels in the bloodstream and increases lipid (fat) metabolism.

http://www.build-muscle-and-burn-fat.com/soy-versus-whey-protein.html

Edited February 23, 2010 by minimeme
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