TweetI have been going to a urologist and having my levels checked. He has me on .8 ml every 10 days. But between going for blood work I will tweak my dosage for optimal gains. But before my testing for a month I go back to normal and all my levels are perfect. I have put on some good size and I still use some of my own brew so I know what I have is good. But it's a good idea to have it checked if you are not seeing results or just go after it blindly. My doctor does peak and trough. His is very thorough. Which is another reason I wear big clothes when I go in for my visits, lol