Ribose Chewable 1000mg ( D-Ribose ) 60 wafers from Source NaturalsRibose Chewables Tablets Fruit Flavor Enhance ATP Energy Levels During strenuous exercise, large amounts of ATP, the body's primary energy carrying molecule, can be depleted in heart and skeletal muscle cells. Ribose is a simple sugar used by the body to synthesize nucleotides, ATP, nucleic acids, and glycogen. Supplement Facts Serving Size: 3 chewable tablets Amount %DV Ribose 3 g Other Ingredients: stearic acid, magnesium stearate, fructose, natural