Looks like there is no real natural alternative to Anabolic Steroids... I have never taken "gear" and never will. Side effects just not worth it based on my research, talking to my bother in law (who is a Doctor/Head Surgeon) and lastly my opinion. People are more than welcome to disagree with me and that is cool.
Be nice to find that truly natural alternative though that is safe and legal...
Well nothing natural that would alter hormones would be safe anyway. Altering hormones will always have side effects, whether it is some "natural" way or through injection of synthetic hormones. Either you get on gear or you accept your natural limits. That's pretty much your only choices until gene therapy becomes reliable and cheap enough for average people to use.