D-Ribose + Magnesium is a food supplement based on D-Ribose and magnesium in citrate form. Magnesium helps reduce tiredness and fatigue, contributes to electrolyte balance, protein synthesis and normal energy metabolism. It participates in the normal functioning of the nervous system, muscles and bones. How to use: 1 teaspoon per day dissolved in a glass of water or juice. It is recommended 2 teaspoons a day dissolved in 1-2 glasses of water or juice 45-90 minutes before exercising.