Nicotinamide adenine dinucleotide (NAD) is a vital coenzyme found in every cell, essential for metabolism, DNA repair, and energy production (ATP). It exists in two forms—NAD+ (oxidized) and NADH (reduced)—and is crucial for longevity and cellular health. Produced naturally via diet (vitamin B3), levels decline with age, prompting interest in supplementation to potentially combat aging and chronic conditions.Core Roles and Functions of NADEnergy Production: NAD+ accepts electrons and protons (hydrogen) to become NADH, transporting them to the mitochondria to drive ATP synthesis, the cell's energy currency.

Metabolism & Aging: It acts as a cofactor for enzymes that regulate metabolic pathways and sirtuins, which are proteins involved in repairing DNA and regulating cellular aging.Immune Response: NAD is required by immune cells (macrophages) during acute responses and contributes to regulating inflammation.Forms of NAD and ProductionNAD+ (Oxidized): The active form that accepts electrons.NADH (Reduced): The form that carries electrons to the mitochondria.Production: The body creates NAD+ through the de novo pathway or the salvage pathway, utilizing vitamin B3 precursors like niacin, nicotinamide, and nicotinamide riboside found in foods like meat, fish, and legumes.Health Benefits and Therapeutic ResearchPotential Benefits: