I took the stuff I was told it helps out in the gym with overall pumps, and I guess there is some truth in that, the ingredients are niacin, tribulus, horney goat weed, argenine, zinc, yohimbe. I know niacin helps blood flow as well as argenine. And tribulus is good for PCT
I actually threw it in PCT and I feel it helped jump start me and keep the pumps up. It dosent increase size it is made to create better blood flow or (pumps)