D-Ribose is a sugar molecule that occurs naturally in the body and is used by cells to produce energy. As a supplement, D-ribose is marketed to improve athletic performance and boost energy levels. Some studies have shown that D-ribose may improve exercise endurance and recovery time, especially in individuals with heart conditions or chronic fatigue syndrome. However, more research is needed to confirm these benefits.
D-Ribose is generally considered safe for most people when taken in recommended doses. However, it may cause gastrointestinal discomfort, diarrhea, or headache in some individuals. People with diabetes should use caution when taking D-ribose, as it may affect blood sugar levels.