NAD⁺ (nicotinamide adenine dinucleotide) is the oxidized form of a vital coenzyme found in all living cells. It plays a central role in energy metabolism, cellular repair, and aging-related processes.
Key Functions of NAD⁺
Electron Transport: NAD⁺ accepts electrons during metabolic reactions, becoming NADH. This redox cycling is essential for ATP production.
DNA Repair: It activates enzymes like PARPs that help fix damaged DNA.
Sirtuin Activation: NAD⁺ is required by sirtuins—enzymes that regulate aging, inflammation, and stress resistance.
Cell Signaling: It supports communication between cells, especially under metabolic or oxidative stress.