Ok, I started TRT back 6 months ago when my results came back below 400. Taking .5CC a week of Test Cy. Actually got good results at the gym compared to years of never using test. Not sure how long my test has been low. My levels have ranged 900-1050 since starting. Now my question, could I go up on test, maybe 1CC for a few weeks and then back down for a training? If I did do I need to come completely off and PCT? Have I already killed my natural test production by being on therapy? Do I need to come on and off of TRT therapy everyonce in a while?