Please excuse me for butting into a discussion that has nothing to do with me but....Aaron..i do not know your situation..so I have to ask...promote re-growth of a penis or promote the growth of a penis (increase it's size) ????? The first I do not know anything about, the second possibility...well.. you may want to explore more natural options than steroids...which can be harmful to your health. I would also have to ask why you feel the need to increase penis size..it is a question I would ask of any man, because as a woman, I and many other women, do not care about size, just about the man attached to it. Penis size ranges from (on average) about 4 inches to 8 inches...with exceptions of course, either way. I hope you will check out the info available on wellsphere before you make any decisions on taking any medication that could have adverse side effects.