Nutrex Research takes muscle-building supplementation to the extreme with Muscle Infusion Black. This ultra-potent formula features seven multi-faceted and highly-intense protein components, each providing a unique absorption rate and release of anabolic amino acids for optimum performance and efficacy. What differentiates Muscle Infusion Black from other muscle-building formulations is its speed and duration. The protein complex found in Muscle Fusion Black helps speed up anabolic activity, while continuously supplying your body with essential amino acids that will ultimately lead you one step closer to your muscle-building goals.

Nutrex Muscle Infusion Black is packed with Branched-Chain Amino Acids (BCAAs) and Glutamine. It also incorporates special enzymes to help speed up protein absorption for increased muscle growth and development. Muscle Infusion Black provides a comprehensive array of important vitamins and minerals to ensure maximum protein synthesis and utilization. This formula is guaranteed to optimize protein consumption in order to achieve leaner, bigger, and firmer muscles in no time.

Nutrex Muscle Infusion Black does not include any carbohydrate, fat, or other unnecessary ingredients, such as maltodextrin, fructose, oil etc., which do not contribute significantly to your muscle-building program. Underground is determined to provide you only high-quality protein sources, which are essentially the crucial building blocks of muscle tissues. Muscle Infusion Black does exactly that. This is the only formula that provides unbridled protein supplement that gives you the best results you can get. Muscle growth and definition is what Muscle Fusion Black is all about. This is the ultimate protein matrix you've always been looking for!