My little brother is 19 years old and he knows that I have done cycles before and he wants to get on. I told him that he is way to young, but what is the right age to start a cycle. He has 3 years of training under his belt and has done damn well for his age he has the knowledge of training and diet but no matter what i tell him he will proably find it and start on a cycle what could the repructions be.