What are the different Proteins listed on supplements?
Egg (Ovalbumen) protein is from egg whites. This has long been considered the best source of protein for supplements because of its excellent amino acid profile. Whole Egg protein has many of the same attributes of egg white protein, but with extra calories and fat. Soy is the highest quality vegetable protein extracted from soybeans. It has also been shown to enhance fat loss more effectively than casein and may help reduce cholesterol levels. SOY NOTE: It has been widely reported that soy contains phytoestrogens (isoflavones) that can interfere with muscle hypertrophy. In fact, a study published in the 2007 issue of Cancer Epidemiology Biomarkers and Prevention showed a decrease in testosterone levels and an increase in estrogen for the study participants. Unfortunately the study was flawed. One of the subjects started with a testosterone level that was 200% higher than the other subjects average levels and he experienced a steady drop during the study. Those levels indicate a subjec
