Soy can lower estrogen. This has been proven. In fact, the reason it's recommended for women is because it helps prevent cancer by it's anti-estrogenic properties.
I have one scoop a day.........soy isolate with my oats.....whey in after training and a slow-digeting (casein usually) in bed...........gotta have that mix, the body becomes accustomed way too easily.........
Both are fine. I use whey myself, its cheap, available, and high-quality. The phytoestrogens in soy stick to the receptors in your bones much better than the receptors elsewhere; meaning you shouldnt get tits from using it. I wouldn't go overboard with the soy just to be on the safe side. Soy generally causes a larger increase in IGF-1, however (I believe most plant proteins do).
it does......I do agree with SC, however, once a day is about all you need.....stick with meat sources, eggs, milk, etc for the rest of your intake.....I sometimes use it post training, as many of the ones I find have some carbs, fats, and sugars tossed into the mix as well........
Right, that is why I was referring to it in the plant category, not so much the incomplete category. I believe it to pale in comparison to the other forms mentioned.
I like an omelette with tofu a couple of day a week - great stuff. Never used soy derived pro-powders but would never worry about phytoestrogens - research is very inconclusive one the matter at this point. Besides can we gear up some studies on healthy individuals, not some pregnant and menopausal rate, or women at best.