BioTechUSA Black Test CapsulesIndication: Pay attention to your testosterone levels: Among the active ingredients of the Black Test, zinc contributes to maintaining normal testosterone levels of blood. Regulate your hormonal activity: Vitamin B6 contributes to regulating hormonal activity. Manage your energy levels: Niacin contributes to normal energy yielding metabolic processes. How to use: On training days, take 3 capsules before workout. On rest days, take 3 capsules in the