Well... I've read at pretty much all boards that I've been that you always should use more test than deca ... at least 200 mg. to be safe... now, why is that for?? I mean, deca even at low dosis such as 300 mg./week will totally shutdown your endegenous test production, that's for sure... but if you are using test, the test is exogenous... so it doesnt really have anything to do with endogenous test... the exogenous test you are injecting should take care of any libido problem or so... so why is most people always recomending to use more test than deca??