Jarrow Formulas Ribose Muscle Edge™ is made in the USA by a process of microbial fermentation of natural vegetarian sources, and is protected by U.S. patents 6,159,942, 6,534,480, 6,218,366, and 6,339,716.Ingredients:100% D-Ribose. 2,000 mg. Contains NO other substances.Suggested Use:Take 1 to 3 scoops before or after exercise, or as directed by your qualified health consultant. Each scoop provides approximately 2.2 grams D-Ribose.