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Old 07-01-2011, 11:39 AM   #3
Steven Low
Senior Member
Join Date: Mar 2007
Posts: 3,045

Well, whey is primarily derived from animal milks.

Soy is from plants.

Since we evolved as meat eaters I don't think it would be a stretch to say that we absorb and translate energy and other signalling more from animal type proteins better than plant protein.

I don't know the particular amino acid compositions of whey and soy respectively, but I do know that whey contains at least a significant percentage of BCAAs which has been shown to have favorable effects during exercise and metabolism in general
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