was ist nmn supplement — what does this mean exactly?

NMN (nicotinamide mononucleotide) is a nucleotide that the body converts into NAD+ (nicotinamide adenine dinucleotide), a key coenzyme for energy metabolism and DNA repair. NAD+ levels decline with age, which has led to NMN being marketed as an anti-aging supplement. However, human evidence remains limited. Small studies show NMN can raise blood NAD+ levels, but whether this translates into meaningful health benefits—such as improved physical performance or cognitive function—is not well established. Most data come from animal models. Additionally, long-term safety data in humans are incomplete. NMN is not approved as a novel food in the EU and is often sold as a dietary supplement, which creates regulatory gray areas. Consumers should be skeptical of exaggerated anti-aging claims. A healthy lifestyle with balanced nutrition, exercise, and adequate sleep has far stronger evidence than NMN supplements.