Vitalibre NAD+ contains 500 mg of nicotinamide riboside, along with trans-resveratrol, no-flush niacinamide, quercetin, L-tryptophan per serving to improve energy metabolism, healthy aging process, and mental clarity.* The Precursors of NAD 500 mg Nicotinamide Riboside 100 mg Non-Flush Niacin 100 mg L-Tryptophan A Blend of Powerful Antioxidants Trans-Resveratrol & Quercetin