I buy whey protein at the grocery store, and I'm comfortable doing so because it makes no promises other than being something I can use to get some easy calorie

I buy whey protein at the grocery store, and I'm comfortable doing so because it makes no promises other than being something I can use to get some easy calories and protein. But places like GNC have lots more than just protein and creatine under "Muscle builders", "Performance Formulas", "Cleansing & Detox" and "Appetite Control". I consider those to be the same market as a bunch of the stuff on this list.