During the nine weeks test whether healthy snacks a group of

Rob Stinnett (CC BY 2.0) Shaker filled with whey protein is the culmination of a popular weight training. Not surprisingly, it is easily accessible and effective in promoting muscle growth [1]. In contrast, soy protein is consumed mainly by vegans and treated as a product cheaper, inferior and less effective than the "whey".
Brown and colleagues designed and conducted a study [2], which would give an answer to this question. 27 young, healthy, trained men, non-vegetarians were divided into 3 groups. The first two were given 33 grams of protein (soy or whey) as three protein bars, which were eaten during the day. Persons healthy snacks qualified healthy snacks for the third group were unlucky not received bars. All participants were subjected to the forced training healthy snacks Full Body Workout type in the low range of repetitions (4-6).
During the nine weeks test whether healthy snacks a group of "soy" and "whey" stepped up participation in lean body mass (about 2%, see table), with no statistically significant difference between them. At the same time the group without bars, did not increase lean body mass.
In light of this study is the soy protein as good as when building muscle mass whey protein. An additional advantage is the presence of soy protein antioxidants (isoflavones, saponins, copper and antioxidant enzymes), which translated into a higher blood antioxidant status tested, compared to other groups. So maybe instead of "Whey" and a handful of antioxidants in tablets consider soy protein?
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