Test Boosters are really big right now, I've tried a lot of them but the thing I keep coming back to is just straight Tongkat Ali. Its one of the few test boosters or test boosting ingredients that has actaully been shown to boost test and most of these test booster products are just a blend of tongkat ali, fenegreek, etc. One of the best things you can do to boost test is eat clean, get plenty of sleep and do heavy leg days