How NAD+ Works

NAD+ is a critical coenzyme found in every cell of the body, acting as a structural cornerstone for cellular metabolism. It oscillates between two states: its oxidized form (NAD+) and its reduced form (NADH). This cycle serves as the core engine driving the transfer of electrons during chemical reactions that generate energy:

• Powers ATP Generation: NAD+ plays an essential role in glycolysis, the Krebs cycle, and the electron transport chain inside the mitochondria. It acts as the primary electron carrier, picking up electrons from nutrients and converting them directly into adenosine triphosphate (ATP)—the universal energy currency of cells.

• Activates Sirtuins (The Longevity Proteins): Sirtuins ($SIRT1–SIRT7$) are a family of signaling proteins that regulate cellular health, control systemic inflammation, and protect cells from metabolic stress. Sirtuins are strictly NAD-dependent; without high levels of NAD+, these protective pathways remain inactive.

• Drives Poly(ADP-ribose) Polymerase (PARP) DNA Repair: NAD+ serves as an indispensable fuel source for PARP enzymes. When DNA strands suffer damage from oxidative stress or UV exposure, PARP uses NAD+ to repair the genetic blueprint and maintain cellular stability.

• Regulates Cellular Senescence: As organismal models age, tissue NAD+ levels naturally drop, leading to mitochondrial decay and cellular senescence (where cells stop dividing but refuse to die). Supplementing NAD+ in research environments helps reverse this decline, restoring youthful mitochondrial function and cellular health.

Chemical Properties