DOUGLAS LABS - Corvalen M - 347 Gram(s) - NPN: 80039411 -- Corvalen M® offers D-ribose, a natural pentose sugar, plus magnesium to help utilize energy and maintain proper muscle function. This formula also contains malic acid, sometimes knows as the apple acid.D-Ribose is the backbone of the molecular structure of ATP, the main carrier of metabolic energy in the body. D-ribose in ATP is naturally present in every living cell in our bodies. Corvalen M® D-ribose is non-GMO, highly soluble in both hot and cold solutions, and tastes slightly sweet and tart. D-ribose is rapidly and readily (~95%) absorbed with peak blood levels found within 30-45 minutes. Ribose not taken up by the cell is excreted unchanged in the urine. Although D-ribose is a five-carbon monosaccharide, it does not raise blood sugar.Magnesium is critical in facilitating hundreds of biochemical reactions including those involved in energy production. Interconnected with ATP, magnesium is essential for all biosynthetic processes, glycolysis, formation of c-AMP, energy-dependent membrane transport, and muscle function.