A dose of 100 mgs ( very high!) after 6 weeks affected natural test by 40%. At a normal 30-40 mgs per day I doubt it would "completely shut down your test production and give you a limp dick". That being said, I agree that it is best to run with test. I think dianabol is a very versitile drug with many applications, many of which are discouraged because it is not the absolute perfect possible way to go about it, which I suppose is not inherently a bad thing. I just wish questions would be answered completely here sometimes.