D-Ribose and Magnesium with Acetyl-L-Carnitine is a high potency nutritional booster. With ribose and magnesium that help reduce tiredness and fatigue. 100% active ingredients formulated by expert nutritionists. Suitable for vegans. Not irradiated. Not tested on animals. Instructions for use: Stir 1 heaped teaspoon into water or juice once or twice a day.