Subjects Built 8.8 lbs of MuscleBoost Performance1 Capsule Per DayClinically-Backed Strength Enhancer400 mg Peak ATP® Per ServingDietary Supplement Clinically Backed Musclebuilding Formula Looking for powerful results when they matter most? Muscle Builder will get you there. The potent formula features a science-backed key ingredient in a fully disclosed, clinically-dosed amount. In a 12-week human scientific study, hard-training subjects gained 8.8 lbs of lean muscle vs. the placebo group, which gained 4.6 lbs. That's 90% more lean muscle. In another part of the same study, test subjects increased muscle thickness by 96% more than the increase for the placebo group. These same subjects experienced an increase in strength that was 147% more than the strength increase achieved by the placebo group. Increase Strength & Performance Engineered for those focused on taking their training to the next level, every serving of Muscle Builder features a 400 mg scientific dose of PEAK ATP® (adenosine 5'-triphosphate disodium) to enhance strength and performance when used in combination with a resistance training regimen and balanced diet. Shirt-Splitting Pumps The key ingredient in Muscle Builder has been shown to support vasodilation and blood flow for amazing muscle pumps. What's more, research suggests it can also increase anabolic signaling by activating the mTOR pathway.