Thats a good question - you kinda answered it yourself - as progesterone is naturally foreign to males nobody is prone or predisposed - but on the other hand nobody is invincible to it either - it IS the way your body handles it - so that answers the next one too about the danger zone - a dose for me may do nothing - and that same dose may give you gyno in a couple weeks - really is an issue with internal hormonal make up of the user - I would say as a benchmark though that deca is MOST LIKELY not going to cause gyno in a cycle at 500mg for 10wks or anything lighter than that - I have never met anyone that got gyno in the traditional 400/wk 8wk cycle - you always kill deca earlier than your test anyway. But nothing here is concrete - I cannot stress enough that prog being foreign to us there is no telling how one person will react to the next.

Does that answer anything or make it more confusing?