It must be a fairly good time after you stop taking it because I had stopped taking Hi-Tech's 1- Testosterone ( 1-Andro/ 1-DHEA ) maybe a month before I was tested and my doc said my levels were high . The she gave me this crap about being honest with her about what I was taking , like it wouldn't harm me one bit telling her , but if told the truth , she would've thought I was taking steroids and THAT was the reason for my low test , and I wouldn't have gotten on TRT which I just now finally got on . This doctor was looking for any excuse to not put me on test . I told he right off that I was taking DHEA for maybe a week an half before my first test , and she jumped right out the window and claimed something for which there is absolutely no medical basis for....... and claimed my testosterone was super SUPER low because I was taking DHEA a WEEK and HALF and that had shut me off . I called her out on it , but in a kinda joking way and told her if that's the case she should notify all the medical journals because this would be the very first EVER documented case of DHEA use shutting of someone's testosterone . I researched the crap out the subject and couldn't find ONE case where that ever happened . It is only possible in theory ( and that would only be if you took something like 500 mgs a day for like 6 months straight), to my knowledge from my extensive research , it has never actually happened . I was only taking 50-100 mgs a day for maybe a week and a half , two weeks tops .