I’ve used plenty of testosterone over the years. I must say that napsgear has some good test. Its pretty much the same as the stuff you would get at the pharmacy. I got the product tested and it came out pretty much the same in my bloodwork. On the same amount I came out to 1075ng/dl with the napsgear test, and I got 1083ng/dl with the pharmacy test at the same dose of 125mgs a week. So its good stuff