I mainly take it for hypertrophy from the pumps, but mucsle gain is usually descent, mainly from increased appetite more so than anything else b/c one 4-6 week cycle of IGF1 is'nt going to do all that much in the big picture. I am usually on test and tren when I use it, so I honestly am gaining anyay. As far as fat loss, never cut on it, I will tell you this though, my gf found out the hard way that if you don't keep your diet in check you're going to gain a good deal of fat considering it's similarity to insulin, hell, honestly I just find IGF1 as a good sub for slin b/c you don't have to be as worried about extra carbs, and of course other anabolic benefits as well as proliferation etc....