100% Pure Concentrated Formula Dietary Supplement Since 1994 100% Vegetarian Non GMOParadise Muscle Energy formula is a True Full Spectrum potent concentration. It is naturally extracted without isolating, fractionizing or using toxic solvents, harsh chemicals or gases to ensure all active and synergistic constituents are present in the balanced ratio nature intended.Our Muscle Energy formula is synergistically formulated using three of the world"s most effective herbs for muscle development and libido enhancement. It includes a 20% protodioscin compound, the main active ingredient in tribulus terrestris that is thought responsible for naturally raising testosterone levels.