Dietary Supplement. For Maximum Testosterone Performance. Boosts Free Testosterone*. Helps Regain Sex Drive & Interest*. Promotes Positive Mood & Vitality*. Increases Energy & Stamina*. Help Fight Low-T* The multi-dimensional Iso-Test™ formula features LJ100®, a powerful patented extract derived from tongkat ali , the legendary male herb enhancement herb from the jungles of southeast Asia. LJ100 ®increases body levels of adenosine triphosphate , thereby providing stimulant-free energy without anxiety, jitters, or sleeplessness.*.