I agree with Virtuvian-Man. The idea that you have to run test 200mg higher than Deca makes no sense. Deca dick is caused by taking deca without any test, it suppresses your natural production therefore no sex drive. If your injecting synthetic testosterone (ie. test cyp, test e, etc) you will have plenty of test in your system and a sex drive. I've run deca at 400 and test at 400 with great results. In fact just started running a cycle at 500mg test cyp and 400mg deca.