Beta-NMN comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Last reviewed on 2025-11-14. Where a claim depends on a specific study, the study is described rather than over-claimed.
Research interest in NMN increased after animal studies reported that oral or injected NMN can raise NAD+ levels in some tissues. How NMN is absorbed and distributed in humans is not fully established. Some evidence suggests extracellular NMN may be dephosphorylated to nicotinamide riboside before cellular uptake, while other studies propose specific transport routes. Direct human data on these mechanisms remain limited. Regulatory status also varies: in some countries NMN is treated as a dietary supplement, while elsewhere it is restricted or requires approval, and these differences affect labeling, sale, and research.
Nicotinamide mononucleotide, commonly abbreviated NMN, is a naturally occurring nucleotide found in the cells of many organisms. Its structure consists of a nicotinamide group linked to a ribose sugar that carries a phosphate group. NMN is an intermediate in the biosynthesis of nicotinamide adenine dinucleotide, or NAD+, a coenzyme involved in many metabolic reactions. The abbreviation usually refers to the beta anomer, though related forms can exist. In scientific literature, NMN is distinct from nicotinamide riboside, another NAD+ precursor.
Two enzymatic steps define the canonical route from nicotinamide to NAD+. Nicotinamide phosphoribosyltransferase, known as NAMPT, produces NMN from nicotinamide and phosphoribosyl pyrophosphate. NMN adenylyltransferases, or NMNAT enzymes, then couple NMN with ATP to form NAD+. Whether intact NMN crosses cell membranes efficiently remains an active area of investigation; some studies propose direct transport, while others emphasize extracellular dephosphorylation to nicotinamide riboside followed by uptake. The relative contribution of each route likely depends on cell type, tissue, and experimental conditions.
Trace amounts of NMN have been reported in certain plant foods, including edamame, avocado, broccoli, cucumber, and cabbage. Reported concentrations vary widely because analytical methods differ and food matrices complicate extraction. Endogenous production in cells is generally considered more quantitatively important than dietary intake, though precise human turnover rates are difficult to establish. Commercial NMN for research or consumer products is commonly made through enzymatic synthesis or chemical phosphorylation routes. Regulatory classification differs by country; in some jurisdictions NMN is sold as a supplement, while in others it is treated as a novel food ingredient or restricted substance.
Nicotinamide mononucleotide, abbreviated NMN, is a naturally occurring nucleotide found in cells. Its structure combines a nicotinamide ring, a ribose sugar, and a phosphate group. As an intermediate in the NAD+ salvage pathway, NMN is converted to nicotinamide adenine dinucleotide, a coenzyme central to cellular redox reactions. NAD+ also serves as a substrate for enzymes involved in DNA repair, stress responses, and metabolic regulation. The compound is therefore part of normal cellular biochemistry rather than an exclusively synthetic molecule.
| Property | Value | Notes |
|---|---|---|
| Chemical name | Nicotinamide mononucleotide | Common name; beta form often denoted beta-NMN |
| Chemical formula | C11H15N2O8P | As free acid; salt forms differ |
| Molar mass | 334.22 g/mol | Calculated for the free acid |
| CAS Registry Number | 1094-61-7 | For beta-nicotinamide mononucleotide |
| Biochemical role | NAD+ intermediate | Participates in the salvage biosynthesis pathway |
Research on NMN has focused on aging, metabolic regulation, exercise capacity, and insulin sensitivity, but findings are preliminary. Many human trials are small, short in duration, and use different endpoints, which complicates comparison across studies. No national regulator has approved NMN as a therapeutic drug for any indication. In some countries it is sold as a supplement or research chemical, while other jurisdictions have questioned its status under food or supplement laws. Claims about extending human lifespan or reversing aging are not supported by established clinical evidence.
Nicotinamide mononucleotide, abbreviated NMN, is a naturally occurring nucleotide found in the cells of many organisms, including bacteria, plants, and mammals. Its structure consists of a nicotinamide ring attached to a ribose-phosphate group. NMN functions as an intermediate in the NAD+ salvage pathway, a recycling route that regenerates nicotinamide adenine dinucleotide. The enzyme nicotinamide phosphoribosyltransferase produces NMN from nicotinamide and phosphoribosyl pyrophosphate. A second enzyme, NMN adenylyltransferase, then converts NMN into NAD+.
The biologically relevant form of NMN is generally the beta anomer, which is recognized by NMN adenylyltransferases. NMN is polar and water soluble, and it does not readily diffuse across lipid membranes without assistance. Whether intact NMN enters cells through a specific transporter remains an open question; some studies propose solute carrier family members, while other work favors extracellular dephosphorylation to nicotinamide riboside followed by uptake. This transport and compartmentalization debate affects how researchers interpret oral administration studies. The distinction between intracellular synthesis and extracellular delivery is central to current discussion.
Terminology around NMN can be confusing because several related compounds share the vitamin B3 family. Nicotinamide riboside is a nucleoside, whereas NMN is a nucleotide with a phosphate group, and NAD+ is a dinucleotide coenzyme rather than a simple precursor. Niacin and nicotinamide are also NAD+ precursors but follow different metabolic entry points. In commercial and scientific writing, NMN usually refers to beta-nicotinamide mononucleotide unless another form is specified. Consistent nomenclature helps distinguish chemical identity from proposed biological effects.
Nicotinamide mononucleotide, abbreviated NMN, is a naturally occurring nucleotide. Its structure combines a nicotinamide ring, a ribose sugar, and a phosphate group. The compound exists in cells as an intermediate in the production of nicotinamide adenine dinucleotide, a central redox cofactor. NMN is distinct from nicotinamide riboside, another related pyridine nucleotide, although the two compounds can converge in metabolic pathways. Its chemical formula is C11H15N2O8P, and it carries a net negative charge at physiological pH.
In the salvage pathway, NMN is generated from nicotinamide and 5-phosphoribosyl-1-pyrophosphate by the enzyme nicotinamide phosphoribosyltransferase. A second route produces NMN from nicotinamide riboside through phosphorylation by nicotinamide riboside kinases. NMN is then converted to NAD+ by nicotinamide mononucleotide adenylyltransferases, often called NMNAT enzymes. This stepwise route allows cells to recycle nicotinamide and maintain NAD+ levels under changing metabolic conditions. The relative contribution of each route varies by tissue, species, and physiological state, and it remains an active area of research.
== History == Perhaps the most famous person who exemplified the appearance of untreated congenital growth hormone deficiency was Charles Sherwood Stratton (1838–1883), who was exhibited by P. T. Barnum as General Tom Thumb, and married Lavinia Warren. Pictures of the couple show the typical adult features of untreated severe growth hormone deficiency. Despite the severe shortness, limbs and trunks are proportional. By the middle of the twentieth century, endocrinologists understood the clinical features of growth hormone deficiency. GH is a protein hormone, like insulin, which had been purified from pig and cow pancreases for treatment of type 1 diabetes since the 1920s. However, pig and cow GH did not work at all in humans, due to greater species-to-species variation of molecular structure (i.e., insulin is considered more "evolutionarily conserved" than GH).
== Genes == Alpha: ATP1A1, ATP1A2, ATP1A3, ATP1A4. ATP1A1 is expressed ubiquitously in vertebrates, and ATP1A3 in neural tissue. ATP1A2 is also known as "alpha(+)". ATP1A4 is specific to mammals. Beta: ATP1B1, ATP1B2, ATP1B3 ATP1B4, although closely related to ATP1B1, ATP1B2, and ATP1B3, lost its function as Na+/K+-ATPase beta subunit.
Malolactic conversion (also known as malolactic fermentation or MLF) is a process in winemaking in which tart-tasting malic acid, naturally present in grape must, is converted to softer-tasting lactic acid. Malolactic fermentation is most often performed as a secondary fermentation shortly after the end of the primary fermentation, but can sometimes run concurrently with it. The process is standard for most red wine production and common for some white grape varieties such as Chardonnay, where it can impart a "buttery" flavor from diacetyl, a byproduct of the reaction. The fermentation reaction is undertaken by the family of lactic acid bacteria (LAB); Oenococcus oeni, and various species of Lactobacillus and Pediococcus. Chemically, malolactic fermentation is a decarboxylation, which means carbon dioxide is liberated in the process. The primary function of all these bacteria is to convert L-malic acid, one of the two major grape acids found in wine, to another type of acid, L+ lactic acid. This can occur naturally. However, in commercial winemaking, malolactic conversion typically is initiated by an inoculation of desirable bacteria, usually O. oeni. This prevents undesirable bacterial strains from producing "off" flavors. Conversely, commercial winemakers actively prevent malolactic conversion when it is not desired, such as with fruity and floral white grape varieties such as Riesling and Gewürztraminer, to maintain a more tart or acidic profile in the finished wine. Malolactic fermentation tends to create a rounder, fuller mouthfeel.
CK1δ is involved in different developmental pathways, among them Wingless (Wnt)-, Hedgehog (Hh)-, and Hippo (Hpo)-pathways. In the Wnt pathway, CK1δ can phosphorylate different factors of the pathway, among them Dishevelled (Dvl), Axin, APC, and β-catenin. CK1δ also negatively influences the stability of β-catenin, after its phosphorylation on Ser-45, which permits GSK3β-mediated further phosphorylations and subsequent degradation.
Sources: en.wikipedia.org
==== Internationals that emerged from the Fourth International (USFI) ==== Fourth International Posadist (1962) Committee for a Workers' International, CWI (1974) refounded with the same name after a 2019 split. International Socialist Tendency, IST (1979) founded by expelled members of the original Fourth International in the 1950s International Workers League – Fourth International, IWL-FI (1982) founded by former members of the USFI. Current for the Permanent Revolution - Fourth International, CPR-FI (1989) Previously named Trotskyist Fraction - Fourth International. Founded by expelled members of the IWL-FI Pathfinder Tendency, (1990) based on USA SWP Revolutionary Communist International, RCI (1992). Split from CWI. Previously named International Marxist Tendency, IMT (2004–2024), and the Committee for a Marxist International, CMI (1992–2004) International Workers' Unity – Fourth International, IWU-FI (1997) split from IWL-FI. International Leninist Trotskyist Fraction, ILTF (1998) split from the TF-FI Tendency for the Reconstruction of the Fourth International, (2006) formed by expelled members of the TF-FI. International Revolutionary Left, (2010) split from IMT in 2010 and the CWI in 2019 Revolutionary Communist International Tendency, RCIT (2011) founded by former members of the IST and L5I. International Socialist League, ISL-LIS (2019) International Socialist Alternative, ISA (2020) claims to be successor to the CWI after the 2019 split. ISA-R ( external faction) Internationalist Standpoint, IS (2022) split from International Socialist Alternative.
=== Internet shutdown === Several human rights organisations including Human Rights Watch (HRW) condemned the al-Burhan-led TMC for shutting down the internet in June 2019. A spokesperson, Shamseldin Kabbashi, stated that the internet would be shut down for a long time because it represented a threat to national security. The move was described by HRW as a "gross violation of human rights". International media saw this as a sign of dictatorship and condemned the act. Many see it as an attempt to hide what al-Burhan's allied militia, known as the Janjaweed, were doing in Khartoum to delay uploading evidence of the violations that took place on 3 June 2019 and in the days that followed.
"Homo neanderthalensis". The Smithsonian Institution. February 14, 2010. Human Timeline (Interactive) – Smithsonian, National Museum of Natural History (August 2016). "Neanderthal DNA". International Society of Genetic Genealogy. Archived from the original on June 17, 2006.: Includes Neanderthal mtDNA sequences GenBank records for H. s. neanderthalensis maintained by the National Center for Biotechnology Information (NCBI) Alex, Bridget (February 21, 2024). "What's Behind the Evolution of Neanderthal Portraits". SAPIENS. The Climate Chronicles, explores the impact of Pleistocene climate change on Neanderthals and other hominins.
Radon is produced by the radioactive decay of radium-226, which is found in uranium ores, phosphate rock, shales, igneous and metamorphic rocks such as granite, gneiss, and schist, and to a lesser degree, in common rocks such as limestone. Every square mile of surface soil, to a depth of 6 inches (2.6 km2 to a depth of 15 cm), contains about 1 gram of radium, which releases radon in small amounts to the atmosphere. It is estimated that 2.4 billion curies (90 EBq) of radon are released from soil annually worldwide. This is equivalent to some 15.3 kilograms (34 lb). Radon concentration can differ widely from place to place. In the open air, it ranges from 1 to 100 Bq/m3, even less (0.1 Bq/m3) above the ocean. In the United States, the average outdoor radon level is estimated to be 15 Bq/m3 (0.4 pCi/L). In caves or ventilated mines, or poorly ventilated houses, its concentration climbs to 20–2,000 Bq/m3. Radon concentration can be much higher in mining contexts. Ventilation regulations instruct to maintain radon concentration in uranium mines under the "working level", with 95th percentile levels ranging up to nearly 3 WL (546 pCi 222Rn per liter of air; 20.2 kBq/m3, measured from 1976 to 1985). The concentration in the air at the (unventilated) Gastein Healing Gallery averages 43 kBq/m3 (1.2 nCi/L) with maximal value of 160 kBq/m3 (4.3 nCi/L). Radon mostly appears with the radium/uranium series (decay chain) (222Rn), and marginally with the thorium series (220Rn).
=== Biochemical === In size-exclusion chromatography, the residence time of a molecule is related to its volume, which is roughly proportional to its molecular weight. Residence times also affect the performance of continuous fermentors. Biofuel cells utilize the metabolic processes of anodophiles (electronegative bacteria) to convert chemical energy from organic matter into electricity. A biofuel cell mechanism consists of an anode and a cathode that are separated by an internal proton exchange membrane (PEM) and connected in an external circuit with an external load. Anodophiles grow on the anode and consume biodegradable organic molecules to produce electrons, protons, and carbon dioxide gas, and as the electrons travel through the circuit they feed the external load. The HRT for this application is the rate at which the feed molecules are passed through the anodic chamber. This can be quantified by dividing the volume of the anodic chamber by the rate at which the feed solution is passed into the chamber. The hydraulic residence time (HRT) affects the substrate loading rate of the microorganisms that the anodophiles consume, which affects the electrical output. Longer HRTs reduce substrate loading in the anodic chamber, which can lead to a reduced anodophile population and performance when there is a deficiency of nutrients.
Sources: en.wikipedia.org
The statement noted: "We cannot celebrate the birthday of a state founded on terrorism, massacres and the dispossession of another people from their land.", "We will celebrate when Arab and Jew live as equals in a peaceful Middle East" Jack Rosenthal (8 September 1931 – 29 May 2004) was an English playwright. He wrote 129 early episodes of the ITV soap opera Coronation Street and over 150 screenplays, including original TV plays, feature films, and adaptations. Jolyon Rubinstein (born 22 April 1981), actor, writer, producer, scriptwriter, journalist, op-ed columnist and director; best known for scriptwriting and performing in The Revolution Will Be Televised, a show on BBC Three, alongside Heydon Prowse; Rubinstein's first professional acting job was that of the PR in the TV series Nathan Barley; co-wrote script and acted in BBC Three television show The Revolution Will Be Televised; also wrote for the Financial Times Business and Yahoo In 2018, he co-created the ITV2 hip hop comedy show Don't Hate the Playaz. In 2020, Rubinstein launched the satire news show Not The News with Jolyon Rubinstein David Seidler (born 1937) playwright and film and television writer. best known for writing the scripts for the stage version and screen version for the story The King's Speech for which he won the Academy Award and a BAFTA for Best Original Screenplay; son of Doris Seidler (1912–2010), painter, printmaker and graphic artist. Peter and Anthony Shaffer, playwrights Gary Sinyor (born Manchester, England, 1962), film director, playwright, producer, and writer.
== Food sources == Flax seeds and sesame seeds contain high levels of lignans. The principal lignan precursor found in flaxseeds is secoisolariciresinol diglucoside. Other foods containing lignans include cereals (rye, wheat, oat and barley), soybeans, tofu, cruciferous vegetables (such as broccoli and cabbage), and some fruits (particularly apricots and strawberries). Lignans are not present in seed oil, and their contents in whole or ground seeds may vary according to geographic location, climate, and maturity of the seed crop, and the duration of seed storage. Secoisolariciresinol and matairesinol were the first plant lignans identified in foods. Typically, lariciresinol and pinoresinol contribute about 75% to the total lignan intake, whereas secoisolariciresinol and matairesinol contribute only about 25%. Foods containing lignans:
A phylogenomic and geochemical analysis of proteins plausibly traced to the LUCA shows that the ionic composition of its intracellular fluid is identical to that of hot springs. The LUCA likely was dependent upon synthesized organic matter for its growth. Experiments show that RNA-like polymers can be synthesized in wet-dry cycling and UV light exposure. These polymers were encapsulated in vesicles after condensation. Potential sources of organics at hot springs might have been transported by interplanetary dust particles, extraterrestrial projectiles, or atmospheric or geochemical synthesis. Hot springs could have been abundant in volcanic landmasses during the Hadean.
=== Recreational use === The alkaloid has been rising in popularity as a recreational drug known as 7-OH, particularly in the United States. 7-OH-MIT containing tablets are sold in an unregulated manner over the counter in gas stations and smoke shops, with little to no information provided to consumers about the risk of addiction or adverse effects. According to the United States Poison Control Center, the number of cases relating to kratom-based products such as 7-OH-MIT have increased from under 200 in 2014 to 1600 in 2024, with approximately 40% of 7-OH-MIT reports coming from individuals who were abusing the drug.
Sources: en.wikipedia.org
Nicotinamide mononucleotide is a nucleotide intermediate in the biosynthesis of NAD+. It consists of nicotinamide attached to a ribose phosphate unit. NMN occurs naturally in cells and is present at low levels in some foods.
NMN is a direct precursor in the NAD+ salvage pathway. Enzymes called NMNAT convert NMN into NAD+, a coenzyme used in metabolism and cell signaling. Raising NMN may increase NAD+ in some experimental settings, but the effect depends on tissue and organism.
No. Nicotinamide riboside is a related compound that lacks the phosphate group present in NMN. Cells can convert nicotinamide riboside into NMN, and both compounds feed into NAD+ production through overlapping routes.
NMN is nicotinamide mononucleotide, a nucleotide intermediate in NAD+ metabolism. It occurs naturally in cells and can also be produced synthetically for research or commercial use. Its name reflects its composition: nicotinamide, ribose, and a phosphate group.