I've been eating Herbalife products for years so the Herbalife protien shake was the natural choice but I did compare it to others before using it. The info I got at the time from the personal trainer at VA was took look for how much protein there is per serving. There is an actual formula / scale for it but I can't remember what it is called. Herbalife was the highest I found at the time. I think it is a 5 out of 6. It tastes pretty vile if you don't mix it with something but I used to just gulp it down and ignore the taste.