D-Ribose

D-Ribose is a five-carbon sugar that is the structural backbone of ATP — your cell’s energy currency — of particular clinical importance in conditions of mitochondrial energy depletion such as fibromyalgia, chronic fatigue syndrome, heart failure, and post-viral illness. Unlike glucose, D-Ribose is not burned for fuel but instead used directly to rebuild depleted ATP. Studies show it reduces fatigue, improves exercise tolerance, and restores cardiac energy reserves with remarkable speed. The building block your energy factory has run out of.