This is a working overview of NMN adenylyltransferase, written for readers who want more than a one-paragraph summary but less than a textbook.
Reviewed 2026-06-18. Anything still debated is marked as such rather than presented as settled.
Beyond its intracellular synthesis, NMN can be taken up from the extracellular environment, although the routes are still debated. Some evidence points to direct transport into cells through specific transporters, while other work suggests dephosphorylation to nicotinamide riboside followed by cellular uptake. Once inside, NMN can be converted to NAD+ by NMN adenylyltransferases; the relative contribution of these routes may differ by tissue, species, and experimental conditions. Researchers continue to investigate which mechanisms dominate in intact organisms and how they affect measured NAD+ levels. Direct measurement in tissues remains technically challenging because NMN can be rapidly metabolized during sample collection.
NMN occurs in many living systems, including bacteria, yeast, plants, and mammals. Dietary sources are present in foods such as edamame, avocado, broccoli, and various meats, but amounts vary widely and are generally lower than those used in research settings. Laboratory production often relies on enzymatic synthesis or chemical phosphorylation of nicotinamide riboside, and commercial material is typically supplied as a white to off-white powder. Because NMN is hygroscopic and sensitive to heat, moisture, and pH extremes, its handling requires care to preserve identity and purity. Aqueous preparation should be done with attention to pH and temperature to limit hydrolysis.
NMN is present in small amounts in some foods, including certain vegetables, fruits, and animal products, but food content varies widely and is not well standardized. In laboratory research, NMN is used as a tool compound to study NAD+ metabolism, mitochondrial function, and cellular stress responses. Animal studies have reported changes in NAD+ levels and various physiological measures after NMN administration, but species differences and study designs limit direct extrapolation to humans. Human trials have largely focused on safety, tolerability, and pharmacokinetics, with fewer studies examining clinical endpoints.
Nicotinamide mononucleotide, commonly abbreviated NMN, is a naturally occurring nucleotide. Its structure consists of a nicotinamide ring attached to a ribose sugar that carries a phosphate group. The molecular formula is C11H15N2O8P, and the molar mass is about 334.22 grams per mole. In cells, NMN is an intermediate in the salvage pathway that recycles nicotinamide to maintain NAD+ levels. It is not the same compound as NAD+, although it is a direct precursor in one enzymatic step.
| Property | Value | Notes |
|---|---|---|
| Chemical formula | C11H15N2O8P | Neutral form; often supplied as a salt or hydrate. |
| Molecular weight | 334.22 g/mol | Calculated for C11H15N2O8P. |
| Appearance | White to off-white powder | Color can vary with purity and hydration. |
| Solubility | Soluble in water | Aqueous solutions are acidic and stability depends on pH and temperature. |
| Typical storage | −20 °C or below, desiccated | Protect from light; avoid repeated freeze-thaw cycles. |
Natural sources of NMN include mammals, plants, and microorganisms, where it functions as an intermediate in NAD+ salvage and biosynthesis pathways. In mammals, the enzyme nicotinamide phosphoribosyltransferase produces NMN from nicotinamide and phosphoribosyl pyrophosphate. NMN is then converted to NAD+ by nicotinamide mononucleotide adenylyltransferase. Some foods contain measurable NMN, but reported amounts vary widely by species, tissue, and analytical method. The extent to which dietary NMN contributes to cellular NAD+ pools remains an open research question.
Chemically, NMN is described by the molecular formula C11H15N2O8P and a molecular mass near 334.22 g/mol. The beta anomer has a CAS Registry Number of 1094-61-7. It is typically supplied as a white to off-white powder for laboratory use. The molecule carries a phosphate group and a positively charged nicotinamide ring, giving it polar and water-soluble character. These properties influence how it is detected, purified, and stored in research and analytical laboratories.
Research on NMN includes cell studies, animal experiments, and a growing number of human trials. Many early findings come from mice, where changes in NAD+ levels and metabolic markers have been reported. Human data are more limited, and questions remain about effective routes of administration, tissue distribution, and long-term effects. Some trials measure NAD+ in blood or tissue, while others assess physical function or metabolic outcomes. Regulatory status differs between countries, and NMN is not universally approved as a dietary supplement or therapeutic agent.
Nicotinamide mononucleotide, commonly abbreviated NMN, is a naturally occurring nucleotide. Its structure combines a nicotinamide ring with a ribose sugar and a phosphate group. The compound appears in cells across many organisms as an intermediate in the production of nicotinamide adenine dinucleotide, or NAD+. Because NMN sits close to NAD+ in metabolism, it has drawn interest in biochemistry and aging research. The molecule is not a dietary essential nutrient in the classical sense, and its presence in food is generally low and variable.
Small amounts of NMN occur in some foods, including certain vegetables, fruits, and animal products, though the quantities are generally low and variable. Human cells also synthesize NMN internally from nicotinamide and other precursors. Research interest increased after studies examined whether raising NAD+ levels affects metabolism and aging-related pathways in animals. Evidence in humans remains limited and mixed for many outcomes, and questions about effective absorption, tissue delivery, and long-term effects are still open. Regulatory status differs by country, with some markets treating NMN as a supplement ingredient and others restricting its sale.
Nicotinamide mononucleotide, usually shortened to NMN, is a naturally occurring nucleotide. Its structure consists of a nicotinamide base linked to a ribose sugar that carries a phosphate group. In cells, NMN serves as an intermediate in the salvage pathway that produces nicotinamide adenine dinucleotide, or NAD+. Because NAD+ participates in many oxidation-reduction reactions, NMN sits near central metabolic processes. The compound is not a drug in most jurisdictions and is discussed mainly in biochemistry and nutrition research.
== Auszeichnungen == Prix scientifique de la Fondation de France, mit André Langaney, 1978 Prix Jean-Perrin de la Société française de physique, 1985 Der Relictocarabus meurguesianus, ein in Marokko entdecktes Insekt, wird nach ihr benannt.
== Veröffentlichungen == G. Meurgues et G. Ledoux, Intérêt de l’étude du sac interne dévaginé et en extension. Annales de la Société entomologique de France (N. S.), 2: 661–669. Influence de la composition minérale du milieu de culture sur la biosynthèse des Acides Nucléiques d’Aspergillus niger, Dissertation, Conservatoire National des Arts et Métiers 1967. La conservation des spécimens d’histoire naturelle, in Museum International, Volume 38-2, 12. Januar 1986 S. 92–97. Parfums de Plantes, préface de Philippe Taquet, Verlag des Muséum national d’histoire naturelle, 1987. ISBN 2-85653-156-3 Un exemple de collaboration entre un musée et l’industrie pour l’exposition Parfums de plantes au Muséum national d’Histoire naturelle, in Culture scientifique et Technique de l’Entreprise, 1994, S. 229–232. De la galerie de Zoologie à la grande Galerie de l’Évolution, in: La conservation – une science en évolution: bilan et perspectives, Actes des troisièmes journées internationales d’études de l’ARSAG, Paris 21.–25. April 1997 S. 57–62. Du jardin de Buffon à l’Afghanistan: mémoires d’une naturaliste, L’Harmattan 2019, ISBN 2-343-18544-1.
== Leben == Langbein studierte von 1963 bis 1968 Chemie an der Friedrich-Schiller-Universität Jena. Danach war er bis 1973 wissenschaftlicher Assistent an der Universität Jena. In dieser Zeit promovierte er bei Adalbert Feltz. Bis 1985 folgte die Promotion B, ebenfalls an der Friedrich-Schiller-Universität Jena, die 1991 zu Habilitation umgewandelt wurde. Im Jahr 1985 erlangte er die Facultas Docendi, lehrte Anorganische und Allgemeine Chemie an der Universität Jena und hatte danach einen Studienaufenthalt am Lehrstuhl „Chemische Kinetik“ der Moskauer Staatlichen Universität bei Michael Georgiewitsch Kusmin. Anschließend arbeitete er von 1986 bis 1992 als Hochschuldozent für Anorganische Chemie an der TU Dresden. Er wurde 1992 an die C3-Professur für Anorganische Molekülchemie an der TU Dresden berufen, die er bis zu seiner Emeritierung 2008 innehatte.
== Forschungsschwerpunkte == Mischfällprozesse, Sol-Gel-Prozesse (Alkoxidhydrolysen) und Gefriertrocknung Mechanismen von Hydrolyseprozessen und thermischen Zersetzungen Kinetik und Thermodynamik von Phasenausbildungs- und Umwandlungsprozessen (insbesondere von Verbindungen der Spinell-Supergruppe und Perowskit-Supergruppe) Synthese-Struktur-Eigenschaftsbeziehungen bei oxidkeramischen Rohstoffen
Sources: de.wikipedia.org
NMN is nicotinamide mononucleotide, a nucleotide intermediate in NAD+ biosynthesis. It consists of nicotinamide, ribose, and phosphate groups.
No. NMN is a precursor, while NAD+ is the dinucleotide product formed after an adenylate group is added. They are distinct molecules with different cellular roles.
Small amounts of NMN have been reported in several foods, including some vegetables and meats. The concentrations are variable and usually much lower than those used in laboratory research.
NMN stands for nicotinamide mononucleotide. It is a nucleotide intermediate in the cellular pathway that produces NAD+, a coenzyme involved in energy metabolism and signaling. NMN is not the same compound as NAD+.