Response of natural testosterone to supplemental testosterone

[kelkel]

Thanks - this is basically the way I thought it would work. Although you are saying basically any amount of testosterone in the patch will completely shut down his natural test production, even if what's in the patch isn't enough to entirely replace his natural test to the level it would be without it

Correct.

As a secondary question, do people use patches for bodybuilding purposes? Is there enough test in them for that? How strong are these patches?

​Virtually never.