How NAD+ and precursors works
NAD+ helps cells use energy; wellness injection benefits remain unproven.
Also called: NAD+, NAD, nicotinamide adenine dinucleotide, coenzyme I, DPN, NR, nicotinamide riboside, NMN, β-NMN, nicotinamide mononucleotide.
NAD+ and precursors · NAD+ coenzyme and vitamin B3-derived precursors.
NAD+ helps cells move energy from food and supports enzymes that repair DNA. NR and NMN are building blocks used to make it. Swallowing a precursor, infusing NAD+ and injecting it under the skin are different exposures. A higher blood level does not show that organs work better.
- NAD+/NADH redox pair: Transfers electrons during energy production.
- Sirtuins and PARPs: Use NAD+ in stress responses and DNA repair.
- NRK and NMNAT pathways: Convert NR and NMN into NAD+; gut metabolism also contributes.
Half-life: NR was about 2.7 hours in four volunteers. A reliable human terminal half-life for infused NAD+ is not established.
Related to NAD+ and precursors
- MOTS-c: A peptide the body makes; injection benefits and safety remain unproven.
- SS-31 (elamipretide): A peptide approved for Barth syndrome muscle strength; benefit needs confirmation and broader energy benefits remain unproven.
Sources
- GenoGenix LLC - 718739 - 01/20/2026, FDA · FDA · 2026
- Safety of beta-nicotinamide mononucleotide (β-NMN) pursuant the regulation (EU) 2015/2283 and the bioavailability of nicotinamide from this source in the context of Directive 2002/46/EC., Turck et al. · EFSA journal. European Food Safety Authority · 2026
- The 2026 Prohibited List, World Anti-Doping Agency · WADA · 2026
- 503A Categories Update for September 2024, FDA · FDA · 2025
- DailyMed - NALTREXONE HYDROCHLORIDE tablet, film coated, DailyMed · 2023
- Safety of nicotinamide riboside chloride as a novel food pursuant to Regulation (EU) 2015/2283 and bioavailability of nicotinamide from this source, in the context of Directive 2002/46/EC., Turck et al. · EFSA journal. European Food Safety Authority · 2019
- FDA reminds compounders to use ingredients suitable for sterile compounding, FDA
- FDA to Compounders: Know Your Bulks and Excipients Suppliers, FDA
- Item: /regulated-product-applications/id/application/RP-2116, Food Standards Agency
- Nicotinamide riboside chloride, Food Standards Agency
- NMN 500 (531006), Therapeutic Goods Administration
- Product information, Health Canada
- Re: Docket Number FDA-2023-P-0872, FDA
- Submitted 75-Day Premarket Notifications for New Dietary Ingredients, FDA
- TUE Physician Guidelines: Intravenous infusions and/or injections, World Anti-Doping Agency
Sources checked: 2026-10-18.
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