I had put this together awhile ago, but don't think it made it to this board.. so here ya go
Protein Breakdowns:
There are several sources of protein powders on the market that it gets hard to choose.. I personally use whey as i have weighed the pros and cons, but imo, milk casein protein tastes better... anyway, below are protein options and explanations to help make decisions and clear up ambiguity amongst proteins....
(taken from Muscular Development by Richard B Kreider PhD)
1) SOY PROTEIN: Soy is recoginzed as the highest quality source of vegetable protein. It contains a high concentration of essential amino acids, is low in fat and contains phytoestrogen isoflavones believed to have a number of health benefits. Soy isoflavones also possess estrogenic effects that theoretically serve to negate anabolic responses to training.
2) MILK PROTEIN: Comprised of casein (about 80%) and whey (about 20%). Casein and whey differ in the composition of amino acids, digestibility rate, and availability of various protein subtypes.
3) WHEY PROTEIN: Generally has greater concentration of essential amino acids in comparison to various caseinates and is therefore considered a higher quality protein than casein. Research has suggested that whey protein may increase protein synthesis, enhance immunity and possess greater anticarcinogenic properties in comparison to other forms of protein. For this reason, whey is considered by many as the best source of protein for dietary supplements.
as i read the article it further went to discuss that soy may actually have potential negative health effects on long-term consumption of diets high in soy protein.
whereas whey protein may improve cognitive function in STRESS vulnerable subjects and may also possess a number of potential health benefits.
this was the best part i found out about whey... "It is also possible that consuming whey protein prior to going to sleep may help athletes relax and experience a more restful sleep"
so i do hope some of this info helps you decide on the correct protein source for your needs.
luv super