Six Star Pro Nutrition Testosterone Booster is engineered for all male athletes. Formulated with a key ingredient shown to amplify your body’s natural testosterone production within the normal range and to improve athletic performance. Backed by years of research and development and engineered with full doses of scientifically validated key ingredients shown to boost testosterone levels and even combat estradiol. Six Star Testosterone Booster contains 100mg of boron citrate shown to increase testosterone in 7 days. Six Star Testosterone Booster is scientifically engineered with a unique plant based blend shown in a 7-week study to help maintain peak testosterone-to-cortisol ratio after an intense training regiment. Take 2 capsules with a glass of water twice daily.