I want to preface this by saying that I don’t want to discuss soy. I know it is not the protein of choice for men. I want to discuss what makes a protein a “bad” source. For example, let’s say I want to buy protein bar X or MRP Y. Someone may say, “they use poor quality proteins”. What is the definition of a poor quality protein? Is it poor bioavailability?
I realize that proteins like whey, casein, and eggs are superior, but does that mean that a steak is a poor protein source?
I guess what I am asking is, how do you know if one company has a “better” protein source than another company. For example, I know Biotest is high quality based on reputation, etc., but I can’t request a certificate of analysis or certificate of origin or batch record on the latest lot of surge.