MusclePharm Corporation is an American nutritional supplement company founded in 2010 and headquartered in Denver, Colorado. MusclePharm is sold in over 120 countries and available in over 35,000 global retail outlets, including GNC, Walmart, Sam's Club,Vitamin Shoppe, Walgreens, Costco, and Dick's Sporting Goods. Online retailers such as BodyBuilding.com, Amazon.com, Groupon.com, and others also sell MusclePharm products.