I was on test cypionate as prescribed by my doctor. It only lasted for 10 weeks and then my insurance guide lines changed so i had to come off. I purchased what was to be test c through a friend of a friend. Come to find out it was test e. I need to be ordering some more on my own. I only take 0.5 ml once a week. I've done some research and mainly what i've seen the guys doing trt use test c. Is there a benefit using test c over test e? I've been on the test e for a few months now and like the progress i've made. I hate the pain in the glute after pinning though. It was test e 300 which had a higher concentration than the test c. Any advise from anyone who has used both or either one exclusively?