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D-ribose is a naturally occurring sugar used by every cell in the body.* It's an essential compound in energy metabolism that serves as a building block for adenosine triphosphate (ATP)-the body's basic energy source.* D-ribose is also the backbone of genetic material, DNA and RNA.* Studies have shown that ribose supplementation can enhance cardiac energy levels and support cardiovascular metabolism. Further studies suggest that ribose plays a role in supporting energy recovery after exercise. Exercise increases free radical production in muscle tissue. Ribose may strengthen and support the body's crucial antioxidant defenses.*