I see that among the cheap products there are enough that contain whey protein concentrate or whey protein isolate, which have optimal amino acid profiles. The

I see that among the cheap products there are enough that contain whey protein concentrate or whey protein isolate, which have optimal amino acid profiles. The only problem is that many of the cheapest mix various useless additives with the proteins, e.g. flavors or sweeteners. I prefer to use only pure protein powders, so I can choose to add to them only what I want. If you really want to have a sweet cream or drink based on the protein powder, adding sugar and vanilla extract and/or cocoa or some other flavor takes only a few seconds, less than the time needed to mix the powder with water and with whatever other ingredients are used.