Nicotinamide Adenine Dinucleotide (NAD⁺) is a coenzyme found in all living cells that plays a central role in redox reactions and energy-transfer pathways. NAD+ is a vital coenzyme found in every cell of the body. It fuels multiple biological processes, including energy production, DNA repair, immune function, and healthy aging. In laboratory environments, NAD⁺ is frequently used as a reagent in studies of cellular metabolism, mitochondrial function, and biochemical oxidation–reduction processes.

However, NAD+ levels decline naturally with age, contributing to fatigue, cognitive decline, and chronic disease.

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