NMN 500 mg | Nicotinamide mononucléotide | Précurseur du NAD+ | Énergie cellulaire et longévité

NMN (nicotinamide mononucleotide) is a naturally occurring nucleotide and the immediate biosynthetic precursor to NAD+ (nicotinamide adenine dinucleotide) a coenzyme found in every living cell that is essential for cellular energy production, DNA repair, and the regulation of hundreds of metabolic processes. NMN supplementation supports NAD+ biosynthesis, helping to maintain the NAD+ levels needed for healthy cellular function. Consult a healthcare practitioner before use if you are pregnant, breastfeeding, or have a history of cancer or are undergoing cancer treatment.

NAD+ is a coenzyme that participates in over 500 enzymatic reactions in the human body, including cellular energy production, DNA repair, and sirtuin mediated gene regulation. Despite its fundamental importance, NAD+ levels decline by approximately 50% between young adulthood and middle age. This decline is driven by increased NAD+ consumption by PARP enzymes responding to accumulated DNA damage, by CD38 (an NAD+ consuming enzyme that increases with age), and by reduced biosynthesis capacity. Age related NAD+ depletion is now recognized as a central mechanism in the biology of aging.

NMN is converted directly to NAD+ by the enzyme NMNAT (nicotinamide mononucleotide adenylyltransferase) in the Preiss Handler biosynthesis pathway. Because NMN is one biosynthetic step from NAD+, it is one of the most direct and efficient routes to raising cellular NAD+ levels. Human clinical studies have shown significant increases in blood NAD+ levels within hours of oral NMN supplementation. NMN is more direct than other NAD+ precursors such as niacin or nicotinamide, which require additional biosynthetic steps before conversion to NAD+.

NAD+ is the primary electron carrier in oxidative phosphorylation the mitochondrial process that produces ATP (the cell's energy currency). NAD+ accepts electrons from metabolic substrates and transfers them to the mitochondrial electron transport chain, driving ATP synthesis. Without adequate NAD+, mitochondrial energy production is impaired, reducing the cell's capacity to generate ATP and perform energy dependent functions. NMN supports NAD+ biosynthesis, helping to maintain mitochondrial function and energy production capacity across high demand tissues including muscle, brain, liver, and heart.

PARP (poly ADP ribose polymerase) enzymes are the primary DNA repair enzymes in human cells. They consume NAD+ to synthesize poly ADP ribose chains that coordinate the DNA strand break repair response. As DNA damage accumulates with age, PARP activity increases, consuming more NAD+ and accelerating NAD+ depletion. Maintaining NAD+ substrate availability through NMN supplementation supports healthy PARP mediated DNA repair activity and genomic integrity.

Consult a healthcare practitioner before use if you are pregnant or breastfeeding, have a history of cancer or are undergoing cancer treatment (NAD+ supports cellular proliferation pathways and implications for cancer biology are an active area of research), or are taking medications that affect NAD+ metabolism. Keep out of reach of children.