A double blinded placebo controlled clinical study in healthy trained subjects demonstrated efficacy and tolerability of XTest -Increases Testosterone production -Improves Nitric Oxide Production -Significantly improves muscle strength and endurance -Improves cardio-pulmonary endurance -Promotes muscle growth -Improves lean body mass -Improves serum testosterone -Significantly increased Swimming speed -Significantly increased Swimming distance -Significantly increased Muscle strength -May reduce muscle wasting as indicated through suppressed Ubiquitin Proteasome activity in vitro -Activates cellular protein synthesis machinery through activation of mTOR signaling, helping increased protein synthesis in skeletal muscle cells -Improves skeletal muscle development through up-regulation of transcription factors involved in myogenesis -Protection from Oxidative stress induced mitochondrial dysfunction -Activates AMPK in skeletal muscle cells, indicating increase in glucose uptake, fatty acid oxidation, and mitochondrial biogenesis. View Clinical Study View Performance Metrics Ingredient listing: Cinnamomum Tama leaf extract 46-47%Garcinia Mangostana Fruit rind e 22-24%Microcrystalline cellulose powder 27-29%Silicon dioxide 1-3%