From my readings and research i concluded that if running test with primo the primo should be of a higher dose then the test. The primo is supposed to enhance the test levels by roughly a 1/3. This is just what I read I am by no means an advanced juice man. I can say that this is the best and most informative forum I have come accross on the internet. I am 50 and enjoying the 1st test e only cycle. All the info I have is from this site. Everything is going as the people here have explained it would. I have gained 18 lbs and Im sure there is some water weight. Sex drive is threw the roof = happy wife. I look and feel much better. I will continue to read and research here on this awesopme forum. Thanks to all that help and care that people do the correct things.