I look at some of older the pro bodybuilders who quit AAS, and this is where my opinion comes from. I grew up with Shane DiMora (google if you don't know who he is), and he got big with AAS - period. Sure, he trained hard and ate right, but he was not a big guy when he started. I have worked out for 35 years and have good genetics, and the only time I looked like a pro was when I was on AAS 26 years ago for a competition. I have not used since, and so far do not require TRT. I have built much mass naturally, and when I do go on again, I will compete and win. Look at Lou and Dorian now - I do not see bodies that were built up to their potential naturally before using gear. Just my observations and opinion.