I know the industry and which companies are credible...I also use their protein myself. If you're new to this stuff and expect me to say that I gained 40lbs off of it, you won't. Protein in just protein. In the grand scheme of things unless it's postworkout, it matters more IF you're getting enough protein rather than what kind. What you do get from Supplement Direct is exactly what's on the label. Just buy a protein from a reputable company that you enjoy taking and can afford. By the way, if you are new, DO NOT TAKE CREATINE SERUM!!