The highest biological value of protein is an egg. It is the only one that scores 100 out of 100. Whey protein is okay, but once protein has been reduced to a powder it is not acceptable to every body type. For instance, Vata people have a very difficult time with any kind of dehydrated foods. And proteins are so easily denatured, if they use the wrong process, the proteins will be interpreted by the body as being invading viruses, which are proteins too.