D-ribose, a monosaccharide sugar found in all living cells, plays a critical role in cellular metabolic pathways that generate energy.† D-ribose supports normal heart and skeletal muscle function and is essential for normal energy production.* Administration of D-ribose has been demonstrated to significantly support heart ATP levels, especially in the setting of diminished exercise capacity.* Pure D-ribose is supplied in powder form with a natural, slightly sweet taste for the convenient supplementation of multi-gram amounts.