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Read more Scientifically Formulated Mass Gainer Combine with your exercise program to help maximize your results with nutrition designed to help you increase size and overall strength. Nutrient-Dense Calories Each serving provides 1340 nutrient-dense calories in a great-tasting blend. Protein High-quality protein helps support size and overall body strength plus glutamine a key amino acid that helps support immune response and overall muscle health. Recovery and Growth Support Branched chain amino acids for muscle recovery and growth plus creatine to fuel energy production. Read more Read more Our promise to every body. Living mighty. Living long. Living fit. Whether youre just getting started or you need to keep going GNC is committed to sparking your motivation and supporting your desire to live well.