Ribose is one of the necessary building blocks for the formation of ATP; the "universal" energy molecule in the body.* Physical stress can deplete ATP stores in cardiac and skeletal muscles.* As the rate-limiting substrate in the synthesis of nucleotides; including ATP; ribose plays a vital role in replenishing ATP; thus; enhancing energy production; improving muscle recovery;and thus Muscle Edge. Jarrow FORMULAS Bioenergy Ribose is made by microbial fermentation and protected by U.S. patents 6;159;942; 6;534;480; 6;218;366; and 6;339;716. Keep out of the reach of children.