was ist nmn supplement — which blood markers matter?

NMN (nicotinamide mononucleotide) is a precursor to NAD+, studied for potential anti-aging effects. Currently, there are no established blood markers specific to NMN supplementation. Relevant markers may include NAD+ levels (if measured), homocysteine (as a methylation status indicator), and markers of inflammation or liver function. Evidence is mostly mechanistic and from animal studies; long-term human data are lacking. NMN is not an approved drug, and individual responses vary. Caution is advised with concurrent supplements or medications. Genetic variants in NAD+ metabolism genes (e.g., NAMPT, NMNAT) could theoretically be relevant but are not clinically validated. Blood testing for NMN itself is not standard; any assessment should be done under medical supervision.