NAD+ (Nicotinamide Adenine Dinucleotide)(NAD+ (Nicotinamide Adenine Dinucleotide)) is a research-grade reference compound supplied for in-vitro laboratory study. NAD+ (Nicotinamide Adenine Dinucleotide) is an essential coenzyme involved in cellular redox reactions and sirtuin activity, and is widely referenced in cellular metabolism, mitochondrial function, and longevity research. For research use only. Not for human or veterinary consumption.