I have used every conceivable protein under the sun and there is NOTHING like ISO AGB. I haven’t grown like I do on this in many years and it’s fun shit. I have always believed the protein powders were pretty much the same and that you should get your protein from food. I can't say that anymore. This formula goes way beyond what you'll get from food for mere powder. I don't really know what reason is, if it's the BiPro or the acetylated glutamine, but with this kind of result I couldn't care less what the reason is.