With powerful LJ100 Longjack. Advanced pro-male testosterone. Support formula with physical peak-performance booster. Testosterone is a male sex hormone that plays a key role in developing and maintaining masculine characteristics. It is known to promote vitality and wellbeing and is involved in mood, sex drive, muscle mass and muscle strength. As men age, testosterone levels start to decline. Testosterone UP is an advanced pro-male testosterone support formula that includes a physical peak-performance booster that can help men of all ages.