A combination of malic acid with magnesium and vitamin B2 (riboflavin). All three of these nutrients are important for energy generation. Magnesium malate is involved in the Krebs cycle, and in the activation of many enzyme systems that are important for protein and carbohydrate metabolism. Serving Size: 2 Tablet Servings Per Container: 60 Amount Per Serving % Daily Value Riboflavin (Vitamin B2) 10 mg 769%Magnesium (60% as Magnesium Citrate and 40 % as Magnesium Hydroxide) 124 mg 30%Malic Acid 500 mg Other Ingredients: Microcrystalline cellulose, stearic acid, croscarmellose sodium, gum acacia, magnesium stearate As a dietary supplement, 1 or 2 tablets two or three times daily with meals, or as directed by a healthcare practitioner.Variations in product color may occur. Keep in a cool, dry place, tightly capped.