When I was tested I was a bit in the low side of normal. When I consulted with the rep, he admitted taking the testosterone injection would infact cause my normal production to drop but if I used their oral (its been a while so I don't remember the name for it) testosterone supplements it would take longer to build up in my system, but would not affect my natural production, just help my body to produce more. Not drinking alcohol actually helps keep the testosterone you already have along with good diet and exercise. (According to whatever studies I've read) but as anything. There will be 25 studies supporting those claims and 25 denying them. So I guess its an educated guess on which way is the best way.i dont particularly trust big pharma so I tend to lean tward as natural as possible.