Nicotinamide Adenine Dinucleotide (NADH) is the active coenzyme form of niacin (vitamin B3) & has a role in the energy production cycle in the cells. Each tablet contains 5 mg of NADH. This product is suitable for vegetarians & vegans. DIRECTIONS: 1-2 tablets daily between meals, or as directed. INGREDIENTS: Each tablet typically contains: Nicotinamide Adenine Dinucleotide 5 mg Tableted with: Calcium citrate Hydroxypropyl methyl cellulose Mannitol Sodium ascorbate Sodium bicarbonate CONTRA-INDICATIONS / WARNINGS: None known if directions are followed.