ATP Cofactors is a specially formulated high potency vitamins B-2/B-3 combination, containing Riboflavin and Niacin (as inositol hexanicotinate). ATP Cofactors is intended to be used as part of a complete nutritional program, emphasizing magnesium instead of calcium.Serving Size: 1 TabletServings Per Container: 90Amount Per Serving Riboflavin 100 mgNiacin (as Inositol Hexinicatinate) 500 mgOther Ingredients: Micosolle (silica-based excipient microcrystalline cellulose), stearic acid, silicon dioxide, croscarmellose sodium, magnesium stearate, pharmaceutical glazeSuggested Use: As a dietary supplement take one to three tablets per day or as directed by a healthcare practitioner.Keep in a cool dry place tightly capped.