NAD (Nicotinamide Adenine Dinucleotide) is an essential coenzyme involved in cellular energy metabolism and redox reactions, widely used in biochemistry and life-science research. It is supplied as a high-purity lyophilized powder at >=99% HPLC purity in sealed vials. NAD is studied in research on cellular metabolism, mitochondrial function, enzymatic assays and aging-related pathways, and is commonly applied in cell-culture and biochemical experiments. The lyophilized form provides high stability and easy reconstitution for consistent experimental dosing.. We maintain strict quality control across batches and provide COA for specific batches on request. The unopened product should be stored sealed at 2-8 degree C, protected from light and moisture; for long-term storage keep at -20 degree C and avoid repeated thawing. Small and large orders are accepted, and OEM, private-label and discreet neutral-packaging services are available with worldwide delivery. Laboratory research use only, not for human or veterinary purposes.