We, and by we I am including myself, always seem to recommend that someone who is stacking any combinations of gear use Testosterone in some form. This is very simple for me in that almost any AAS will shut down your HTPA and thus your body's natural Test production. But why is it we state that Test must be run at higher doses than the correlating compound. The human testes produce between 4 and 7 mg of test ed, natural levels could never exceed 49 mg weekly. So if one were to be taking test alongside say Tren ace to protect themselves from HTPA shutdown, and there is no way natural levels can be supressed below 0, why do we insist on using a dose of testosterone, that far exceeds natural replacement levels, greater than the Tren. Bear in mind I always advocate higher Test doses because of it's excellent muscle building propeties on it's own, but we frequently get the question from someone who says thay don't like/react well/have access to testosterone, on how to run a cycle with no or limited test? Science only please, opinions are fine but they may not be right-mine frequently aren't.