Everything below concerns NAD+ salvage. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2025-08-25. Numbers and descriptions here follow the published literature rather than marketing material.
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.
Nicotinamide mononucleotide, abbreviated NMN, is a nucleotide composed of nicotinamide, ribose, and phosphate. Its structure links nicotinamide to D-ribose 5-phosphate through a glycosidic bond, placing it in the pyridine nucleotide family. The compound exists in alpha and beta anomeric forms, and the beta form is the one used in NAD+ biosynthesis. NMN is not a protein or a hormone; it is a small water-soluble molecule that occurs in living cells as a metabolic intermediate.
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.
Dietary sources of NMN include small amounts in certain vegetables, fruits, and other foods, although exact values vary by sample and method. Endogenous NMN concentrations are tightly regulated and often low, making measurement in blood or tissues technically demanding. After oral intake, NMN is thought to be rapidly metabolized in the intestine and liver, and intact NMN may not reach all tissues at high levels. Some rodent studies report increases in tissue NAD+ after oral NMN, while human data remain limited and sometimes rely on blood NAD+ metabolites rather than direct tissue measures.
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.
| Property | Value | Notes |
|---|---|---|
| Common name | Nicotinamide mononucleotide | Often abbreviated NMN |
| Chemical formula | C11H15N2O8P | Beta anomer form |
| Molecular mass | 334.22 g/mol | Calculated from formula |
| CAS Registry Number | 1094-61-7 | Beta-NMN |
| Appearance | White to off-white powder | Typical laboratory grade |
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.
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.
Spruce beer – a beverage made using pine needles. Also called pine beer and nettle beer, it was most likely originally brewed by First Nations, and predates the arrival of Europeans. Squash – the people of southern Mexico were the first to grow squash. Squash along with maize (corn) and beans represented the three sister crops of the ancient Mesoamericans. Sundials – the Inca and other pre-Columbian Americans constructed elaborate sundials for both ceremonial and religious purposes, but also for record-keeping. Sunflower – indigenous Americans were the first peoples in the world to cultivate the common sunflower. Suspension bridge – the ancient Maya constructed a suspension bridge over the Usumacinta River in Yaxchilan. This Maya Bridge at Yaxchilan would have been one of the longest bridges in use in the ancient past. The bridge was constructed in the 7th century CE and was a very long suspension bridge with a relatively level pathway. Syringe – indigenous American medicine men used syringes and hypodermic needles made from materials fashioned from hollow bird bones and animal bladders to inject medicine into sick patients and treat the illness of the patients.
The two substrates of this enzyme are (S)-dihydroorotic acid and oxidised nicotinamide adenine dinucleotide (NAD+). Its products are orotic acid, reduced NADH, and a proton. This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-CH group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is (S)-dihydroorotate:NAD+ oxidoreductase. This enzyme is also called orotate reductase (NADH). This enzyme participates in pyrimidine metabolism. It has 2 cofactors: flavin adenine dinucleotide, and flavin mononucleotide.
=== Different views on well-being === Various cultures have various perspectives on the nature of positive human functioning. For example, studies on aversion to happiness, or fear of happiness, indicates that some individuals and cultures are averse to the experience of happiness, because they believe happiness may cause bad things to happen. Empirical evidence indicates that there are fundamental differences in the ways well-being is construed in Western and non-Western cultures, including the Islamic and East Asian cultures. Exploring various cultural perspectives on well-being, Joshanloo (2014) identifies and discusses six broad differences between Western and non-Western conceptions of well-being. For example, whereas Western cultures tend to emphasize the absence of negative emotions and autonomy in defining well-being, Eastern cultures tend to emphasize virtuous or religious activity, self-transcendence, and harmony. Eunkook M. Suh (University of California) and Shigehiro Oishi (University of Chicago) examined the differences of happiness on an international level and different cultures' views on what creates well-being and happiness. In a study, of over 6,000 students from 43 nations, to identify mean life satisfaction, on a scale of 1–7, the Chinese ranked lowest at 3.3; and Dutch scored the highest at 5.4. When asked how much subjective well-being was ideal, Chinese ranked lowest at 4.5, and Brazilians highest at 6.2, on a scale of 1–7.
=== Phytochemistry === One characteristic of some Viola is the elusive scent of their flowers; along with terpenes, a major component of the scent is a ketone compound called ionone, which temporarily desensitizes the receptors of the nose, thus preventing any further scent being detected from the flower until the nerves recover.
Sources: en.wikipedia.org
The Matrix Revolutions begins immediately after the events of the second movie; as a result of his struggle with the sentinels, Neo returns to consciousness finding himself caught in an isolated train station-like limbo only accessible by order of the Merovingian, from which his mind is unable to free itself. It is here that he meets Sati, a young program created without a purpose, who is being smuggled into the Matrix by her parents, also programs in the machine world. Neo remains trapped until he is freed by Trinity (assisted by Morpheus and Seraph), who threatens the Merovingian in a Mexican standoff. After a final visit to the Oracle, Neo learns that he has powers over the machines which extend beyond the Matrix and that Smith is spreading, threatening to destroy both the Matrix and the real world. Building on the Oracle's previous explanations about the nature of choice, Neo learns that the Architect's assertion that his choice to save Trinity would inherently lead to the extinction of humankind was incorrect, due to his nature as a purely mathematical being rendering him incapable of seeing past choices made by humans, as he considers them mere variables in equations. Having told Neo that he now has the power to choose to end the war and defeat Smith, the Oracle then states "everything that has a beginning has an end, Neo" and informs him that in order for true peace to happen, he must travel to the heavily guarded Machine City in the real world and make a truce with the machines in order to save both races from extinction because of Smith's activities.
== Operations == EFLM has an Executive Board and a range of committees for: science, education and training, quality and regulations, communication and professional representation. Each committee has working groups with a Chair and three full members, there is also a Young Scientist member and they may also have corresponding members, but only one member form each country is permitted. The Science Committee develops collaborative science in Laboratory Medicine between member organisations or individuals and guidelines to set standards of practice to assist member societies in providing quality patient care. The output of the scientific working groups is scientific papers and presentations which contribute to the science of laboratory medicine internationally; a list of publications can be found on the EFLM web-site (link below). Typically publications are peer-reviewed and published in the journal Clinical Chemistry and Laboratory Medicine. The Working Groups are overseen by the Chair of the Science Committee and their activities reviewed annually; scientific and clinically relevant output determine whether they continue. The Education and Training Committee runs educational activities particularly for trainees and those required to develop new skills as well as running scientific and clinical conferences, webinars, etc. The major Congress is Euromedlab held in conjunction with the IFCC, meetings are selected from bids by member societies at the annual General Meeting.
Avicenna discouraged opium's use except as a last resort, preferring to address the causes of pain rather than trying to minimize it with analgesics. Many of Avicenna's observations have been supported by modern medical research. Exactly when the world became aware of opium in India and China is uncertain, but opium was mentioned in the Chinese medical work Kaibao Bencao (973 AD) By 1590 AD, opium poppies were a staple spring crop in the Subahs of Agra region. The physician Paracelsus (c. 1493–1541) is often credited with reintroducing opium into medical use in Western Europe, during the German Renaissance. He extolled opium's benefits for medical use. He also claimed to have an "arcanum", a pill which he called laudanum, that was superior to all others, particularly when death was to be cheated. ("Ich hab' ein Arcanum – heiss' ich Laudanum, ist über das Alles, wo es zum Tode reichen will.") Later writers have asserted that Paracelsus' recipe for laudanum contained opium, but its composition remains unknown.
Selegiline was approved for Parkinson's disease by the FDA in 1989. It had been known since the mid-1960s that high doses of deprenyl had psychostimulant effects. Selegiline was first shown to metabolize into levomethamphetamine and levoamphetamine in humans in 1978. The involvement of these metabolites in the effects and side effects of selegiline has remained controversial and unresolved in the decades afterwards. In any case, concerns about these metabolites have contributed to the development of newer MAO-B inhibitors like rasagiline and safinamide that lack such metabolites. The catecholaminergic activity enhancer (CAE) effects of selegiline became well-characterized and distinctly named in 1994. These effects had been observed much earlier, dating back to the 1960s and 1970s, but were not properly distinguished from the other actions of selegiline, like MAO-B inhibition, until the 1990s. More potent, selective, and/or expansive monoaminergic activity enhancers (MAEs), like phenylpropylaminopentane (PPAP) and benzofuranylpropylaminopentane (BPAP), were derived from selegiline and other compounds and were first described in 1988 and 1999, respectively. These drugs had been proposed for potential treatment of psychiatric disorders like depression as well as for Parkinson's disease and Alzheimer's disease, but were never developed or marketed. In the 1990s, J.
5 December – A single mutation known as Q226L is found to enhance the ability of H5N1 ('bird flu') to infect human cells, particularly in the respiratory tract. Previously, at least three mutations were thought to be required for the virus to infect people and spread between them. 7 December – A study in The Lancet finds that life expectancy progress in the United States is slowing. Only modest increases are likely by 2050, as the country falls below nearly all high-income and some middle-income countries in the global rankings. 9 December – Astronomers report using the infrared capabilities of the James Webb Space Telescope to find 100 of the smallest asteroids ever detected in the main belt, some measuring just 10 metres in diameter. 10 December – AI-based transfer learning predicts that global warming will reach 3°C faster than previously expected. 13 December – A new light-induced gene therapy using nanoparticles to target the mitochondria of cancer cells is demonstrated. 16 December – The China Aerospace Science and Technology Corporation (CASC) launches the first batch of the Guowang (Xingwang) megaconstellation, a planned constellation of 13,000 satellites using a Long March 5 rocket at the Wenchang Space Launch Site. 17 December – Zhúlóng ("Torch Dragon"), discovered by the James Webb Space Telescope, is reported as being the most distant known spiral galaxy ever found, seen as it appeared just 1.1 billion years after the Big Bang.
Sources: en.wikipedia.org
=== Runoff and percolation === Solid bait and liquid insecticides, especially if improperly applied in a location, get moved by water flow. Often, this happens through nonpoint sources where runoff carries insecticides in to larger bodies of water. As snow melts and rainfall moves over and through the ground, the water picks applied insecticides and deposits them in to larger bodies of water, rivers, wetlands, underground sources of previously potable water, and percolates in to watersheds. This runoff and percolation of insecticides can effect the quality of water sources, harming the natural ecology and thus, indirectly effect human populations through biomagnification and bioaccumulation.
There is currently insufficient evidence to recommend any medication for OSA. This may result in part because people with sleep apnea have tended to be treated as a single group in clinical trials. Identifying specific physiological factors underlying sleep apnea makes it possible to test drugs specific to those causal factors: airway narrowing, impaired muscle activity, low arousal threshold for waking, and unstable breathing control. Those who experience low waking thresholds may benefit from eszopiclone, a sedative typically used to treat insomnia. The antidepressant desipramine may stimulate upper airway muscles and lessen pharyngeal collapsibility in people who have limited muscle function in their airways. There is limited evidence for medication, but 2012 AASM guidelines suggested that acetazolamide "may be considered" for the treatment of central sleep apnea; zolpidem and triazolam may also be considered for the treatment of central sleep apnea, but "only if the patient does not have underlying risk factors for respiratory depression". Low doses of oxygen are also used as a treatment for hypoxia but are discouraged due to side effects. In December 2024, the FDA approved tirzepatide, an anti-diabetic and weight loss medication, as a component in the combination treatment of adults with obesity suffering from moderate to severe obstructive sleep apnea. Other components of the therapy are a reduced-calorie diet and increased physical activity.
In humans, for example, the skin located under the eyes and around the eyelids is the thinnest skin on the body at 0.5 mm thick and is one of the first areas to show signs of aging such as "crows feet" and wrinkles. The skin on the palms and the soles of the feet is the thickest skin on the body at 4 mm thick. The speed and quality of wound healing in skin is promoted by estrogen. Fur is dense hair. Primarily, fur augments the insulation the skin provides but can also serve as a secondary sexual characteristic or as camouflage. On some animals, the skin is very hard and thick and can be processed to create leather. Reptiles and most fish have hard protective scales on their skin for protection, and birds have hard feathers, all made of tough beta-keratins. Amphibian skin is not a strong barrier, especially regarding the passage of chemicals via skin, and is often subject to osmosis and diffusive forces. For example, a frog sitting in an anesthetic solution would be sedated quickly as the chemical diffuses through its skin. Amphibian skin plays key roles in everyday survival and their ability to exploit a wide range of habitats and ecological conditions. On 11 January 2024, biologists reported the discovery of the oldest known skin, fossilized about 289 million years ago, and possibly the skin from an ancient reptile.
=== The arts === The first sculptural representations of the human body 20,000–35,000 years ago depict obese females. Some attribute the Venus figurines to the tendency to emphasize fertility while others feel they represent "fatness" in the people of the time. Corpulence is, however, absent in both Greek and Roman art, probably in keeping with their ideals regarding moderation. This continued through much of Christian European history, with only those of low socioeconomic status being depicted as obese. During the Renaissance some of the upper class began flaunting their large size, as can be seen in portraits of Henry VIII of England and Alessandro dal Borro. Rubens (1577–1640) regularly depicted heavyset women in his pictures, from which derives the term Rubenesque. These women, however, still maintained the "hourglass" shape with its relationship to fertility. During the 19th century, views on obesity changed in the Western world. After centuries of obesity being synonymous with wealth and social status, slimness began to be seen as the desirable standard. In his 1819 print, The Belle Alliance, or the Female Reformers of Blackburn!!!, artist George Cruikshank criticised the work of female reformers in Blackburn and used fatness as a means to portray them as unfeminine.
==== 1916–17: Change in British Government ==== In terms of British politics, the declaration resulted from the coming into power of Lloyd George and his Cabinet, which had replaced the H. H. Asquith led-Cabinet in December 1916. Whilst both Prime Ministers were Liberals and both governments were wartime coalitions, Lloyd George and Balfour, appointed as his Foreign Secretary, favoured a post-war partition of the Ottoman Empire as a major British war aim, whereas Asquith and his Foreign Secretary, Sir Edward Grey, had favoured its reform. Two days after taking office, Lloyd George told General Robertson, the Chief of the Imperial General Staff, that he wanted a major victory, preferably the capture of Jerusalem, to impress British public opinion, and immediately consulted his War Cabinet about a "further campaign into Palestine when El Arish had been secured." Subsequent pressure from Lloyd George, over the reservations of Robertson, resulted in the recapture of the Sinai for British-controlled Egypt, and, with the capture of El Arish in December 1916 and Rafah in January 1917, the arrival of British forces at the southern borders of the Ottoman Empire. Following two unsuccessful attempts to capture Gaza between 26 March and 19 April, a six-month stalemate in Southern Palestine began; the Sinai and Palestine Campaign would not make any progress into Palestine until 31 October 1917.
Sources: en.wikipedia.org
NMN stands for nicotinamide mononucleotide. It is a naturally occurring nucleotide and an intermediate in NAD+ biosynthesis.
No. NMN is a precursor that can be converted to NAD+ in cells. NAD+ is the larger dinucleotide that participates in many redox reactions.
Small amounts of NMN have been reported in several foods, including certain vegetables and fruits. The measured levels vary, and the significance of dietary intake is not fully established.
NMN is nicotinamide mononucleotide, a nucleotide intermediate in the NAD+ salvage pathway. Cells use it to help regenerate NAD+, a coenzyme involved in energy metabolism and cellular signaling. It is present naturally in many organisms and is also produced synthetically for research and consumer products.