Why chose a blend of whey protein?

Indeed, there are several very high-quality protein sources such as egg, casein and whey; however, none of them are perfect in every aspect. All of these protein sources are equal in terms of overall health and growth of lean body tissue, but each has its specific physiological strengths and weaknesses. For instance, egg protein is considered the gold standard protein source. Not only does it perfectly support lean tissue growth and maintenance, but it contains a host of growth factors and micronutrients. The downside is that it is very expensive. Whey protein, on the other hand, has been shown to be the fastest metabolized protein source and to have superior immune-stimulating abilities. Casein has been shown to be the slowest metabolized protein source which makes it superior for providing muscle tissue with amino acids over an extended period of time. Thus, even though ingesting one protein source has many benefits, ultimately the best course of action is to consume several high-quality protein sources in order to minimize the weaknesses and maximize the strengths of each source.