dietary supplement is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Last reviewed on 2026-07-05. Where a claim depends on a specific study, the study is described rather than over-claimed.
Commercial creatine monohydrate is typically a white to off-white powder with low odor. It is commonly sold as a fine powder, micronized powder, or larger crystals, but these are physical forms of the same chemical. Purity grades vary, and products may contain small amounts of related substances such as creatinine, dicyandiamide, or moisture. The monohydrate is often selected for supplements and research because its production is well established and its behavior in water is predictable. Analytical certificates usually report assay, loss on drying, and heavy metals.
Creatine monohydrate is a crystalline compound formed from creatine and one water molecule in its solid lattice. Creatine itself is a nitrogen-containing organic acid involved in energy transfer in muscle and other tissues. The monohydrate form is the most common solid form used in research and commercial products because it is stable and easy to handle. The term "monohydrate" refers to the fixed one-to-one ratio of water to creatine in the crystal, not to moisture content. This distinction matters when comparing labels or calculating creatine content.
In chemical terms, creatine monohydrate is often described as N-(aminoiminomethyl)-N-methylglycine monohydrate, though nomenclature varies. Its solid state consists of zwitterionic creatine molecules linked with water through hydrogen bonding. The compound dissolves in water, but dissolution rate depends on particle size, temperature, and agitation. Once dissolved, the hydrate water becomes part of the solvent, leaving free creatine in solution. The monohydrate is not the same as creatine anhydrous, which lacks the water of crystallization and has a higher creatine fraction by mass.
Creatine monohydrate is sold as a dietary ingredient in some countries and as a food supplement in others. Regulatory frameworks vary, so purity limits, labeling rules, and permitted claims are not globally uniform. In the United States, it falls under dietary supplement rules, whereas the European Union treats it as a food supplement ingredient. Pharmacopeial monographs, where they exist, can provide public quality standards, but not every product is required to meet them. Questions about long-term effects and patterns of use remain areas of active study rather than settled regulatory findings.
Solid creatine monohydrate is generally stable when kept cool and dry, but it can hydrolyze to creatinine over time. Moisture, heat, and acidic conditions accelerate this conversion, which reduces assay values and changes the material's properties. Creatinine is a cyclic dehydration product that is also a normal human metabolite, so its presence in a sample is not necessarily a health concern by itself. In quality testing, creatinine is monitored as a marker of degradation and purity.
Identity and purity are assessed with several complementary methods. High-performance liquid chromatography can separate creatine from creatinine and related impurities, often with ultraviolet detection. Nuclear magnetic resonance and infrared spectroscopy provide structural confirmation, while Karl Fischer titration measures water content. Elemental analysis and mass spectrometry may be used for additional confirmation, especially in research or forensic settings. No single method captures every quality attribute, so laboratories typically combine results and compare them against a specification.
| Property | Value | Notes |
|---|---|---|
| Chemical name | N-(aminoiminomethyl)-N-methylglycine monohydrate | Nomenclature varies across sources. |
| Common synonyms | Creatine hydrate; creatine monohydrate | “Monohydrate” specifies one water per creatine. |
| Appearance | White to off-white crystalline powder | Particle size and flowability vary by grade. |
| Solubility class | Soluble in water; slightly soluble in ethanol | Dissolution increases with temperature and stirring. |
| Typical storage | Tightly closed container at 15–25 °C | Protect from moisture and excessive heat. |
Identity and purity are commonly assessed by high-performance liquid chromatography, often with ultraviolet detection, and by spectroscopic techniques such as infrared or nuclear magnetic resonance. These methods can distinguish creatine from creatinine and detect related impurities. Moisture content may be measured by Karl Fischer titration or loss on drying. Particle size, bulk density, and heavy metal limits are additional quality parameters. Not every product is tested by every method, so specifications depend on the intended use and regulatory framework.
Solid creatine monohydrate is generally stable when kept dry and protected from extremes of heat and humidity. In the presence of moisture, it can gradually convert to creatinine, a cyclic dehydration product that has little value for phosphocreatine synthesis. Elevated temperatures and acidic conditions accelerate this conversion in solution. Because the reaction is slow in cool, dry storage, typical shelf lives are measured in years rather than weeks. Packaging that limits moisture and oxygen exposure helps maintain purity.
Recommended storage usually involves a sealed container kept at room temperature, away from direct sunlight and moisture. High humidity can cause caking, which changes flow properties and may complicate accurate weighing. Repeated opening of containers exposes the powder to air and moisture, so smaller aliquots can reduce handling effects. Storage temperature ranges are not absolute requirements; they reflect conditions that slow degradation and preserve consistent physical characteristics. Clean, dry tools help prevent contamination during sampling.
The company was losing money in the 1960s but remained under the control of the Salmon family, descended from a founding partner. Lyons began to close some of its London tea shops and hotels; in 1963 it also merged its LEO Computers business with English Electric's computer interests to form the jointly owned English Electric LEO. In 1964, Lyons sold their half-stake; and English Electric merged the company with Marconi's computer interests to form English Electric LEO Marconi Computers. A continuing problem in the British computer industry was both lack of investment capital and competition with the much larger U.S. computer companies, such as IBM. English Electric LEO Marconi Computers merged with other companies to form International Computers Limited (ICL) which was bought by Fujitsu in 1990. In 1978, Lyons was acquired by Allied Breweries and became part of the resulting Allied Lyons. It fell on hard economic times in the late 1980s; and was sold, eventually being broken up with its ice cream and ice lolly products, which were branded as Lyons Maid, being sold to Nestlé. Other parts that were sold off included Lyons Cakes (sold to RHM and ending up as part of their Manor Bakeries subsidiary which also makes Mr Kipling's Cakes) and Ready Brek cereal (ending up being owned by Weetabix Limited). At the end of 1994, Lyons sold Lyons Biscuits to Hillsdown Holdings, which later sold it to a U.S. investment firm which subsequently sold it to British biscuit manufacturer Burton's Foods. Lyons' cake products, such as Bakewell tart and Battenberg, are owned by Premier Foods.
Liquid carbon dioxide forms only at pressures above 0.51795(10) MPa (5.11177(99) atm); the triple point of carbon dioxide is 216.592(3) K (−56.558(3) °C) at 0.51795(10) MPa (5.11177(99) atm) (see phase diagram). The critical point is 304.128(15) K (30.978(15) °C) at 7.3773(30) MPa (72.808(30) atm). Another form of solid carbon dioxide observed at high pressure is an amorphous glass-like solid. This form of glass, called carbonia, is produced by supercooling heated CO2 at extreme pressures (40–48 GPa, or about 400,000 atmospheres) in a diamond anvil. This discovery confirmed the theory that carbon dioxide could exist in a glass state similar to other members of its elemental family, like silicon dioxide (silica glass) and germanium dioxide. Unlike silica and germania glasses, however, carbonia glass is not stable at normal pressures and reverts to gas when pressure is released. At temperatures and pressures above the critical point, carbon dioxide behaves as a supercritical fluid known as supercritical carbon dioxide.
==== CamAPS FX ==== CamAPS FX, a product of CamDiab Ltd, is a mobile app designed for individuals with type 1 diabetes. It operates in conjunction with various insulin pumps, including the mylife YpsoPump, DANA Diabecare RS, and DANA-i insulin pumps, and is compatible with continuous glucose monitoring systems such as the Dexcom G6 and Abbott FreeStyle Libre 3. The system utilizes a self-learning algorithm that adapts insulin delivery based on glucose data, adjusting every 8–12 minutes, and it is approved for use in individuals aged one year and older, with age requirements varying depending on the CGM system used. CamAPS FX is controlled via a smartphone app, currently available for Android devices, with iOS support in development. The app allows users to set personalized glucose targets and offers features like "Ease-off" and "Boost" modes to adjust insulin needs, as well as a "Slowly absorbed meal" function for managing the effects of high-fat or low-glycemic meals. Remote monitoring capabilities are included through app-based sharing and SMS alerts. The system’s algorithm, developed at the University of Cambridge, has been validated in multiple clinical trials, showing consistent improvements in glycemic control and quality of life.
=== Population structure === The population of P. aeruginosa can be classified in three main lineages, genetically characterised by the model strains PAO1, PA14, and the more divergent PA7. While P. aeruginosa is generally thought of as an opportunistic pathogen, several widespread clones appear to have become more specialised pathogens, particularly in cystic fibrosis patients, including the Liverpool epidemic strain (LES) which is found mainly in the UK, DK2 in Denmark, and AUST-02 in Australia (also previously known as AES-2 and P2). There is also a clone that is frequently found infecting the reproductive tracts of horses.
β′ The β′ subunit is the largest subunit, and is encoded by the rpoC gene. The β′ subunit contains part of the active center responsible for RNA synthesis and contains some of the determinants for non-sequence-specific interactions with DNA and nascent RNA. It is split into two subunits in Cyanobacteria and chloroplasts. β The β subunit is the second-largest subunit, and is encoded by the rpoB gene. The β subunit contains the rest of the active center responsible for RNA synthesis and contains the rest of the determinants for non-sequence-specific interactions with DNA and nascent RNA. α (αI and αII) Two copies of the α subunit, being the third-largest subunit, are present in a molecule of RNAP: αI and αII (one and two). Each α subunit contains two domains: αNTD (N-terminal domain) and αCTD (C-terminal domain). αNTD contains determinants for assembly of RNAP. αCTD (C-terminal domain) contains determinants for interaction with promoter DNA, making non-sequence-non-specific interactions at most promoters and sequence-specific interactions at upstream-element-containing promoters, and contains determinants for interactions with regulatory factors. ω The ω subunit is the smallest subunit. The ω subunit facilitates assembly of RNAP and stabilizes assembled RNAP. In order to bind promoters, RNAP core associates with the transcription initiation factor sigma (σ) to form RNA polymerase holoenzyme. Sigma reduces the affinity of RNAP for nonspecific DNA while increasing specificity for promoters, allowing transcription to initiate at correct sites.
Sources: en.wikipedia.org
The outermost layer of the gastrointestinal wall consists of several layers of connective tissue and is either of serosa (below the diaphragm) or adventitia above the diaphragm. Regions of the gastrointestinal tract within the peritoneum (called Intraperitoneal) are covered with serosa. This structure consists of connective tissue covered by a simple squamous epithelium, called the mesothelium, which reduces frictional forces during digestive movements. The intraperitoneal regions include most of the stomach, first part of the duodenum, all of the small intestine, caecum and appendix, transverse colon, sigmoid colon and rectum. In these sections of the gut there is clear boundary between the gut and the surrounding tissue. These parts of the tract have a mesentery. Regions of the gastrointestinal tract behind the peritoneum (called retroperitoneal) are covered with adventitia. They blend into the surrounding tissue and are fixed in position (for example, the retroperitoneal section of the duodenum usually passes through the transpyloric plane). The retroperitoneal regions include the oral cavity, esophagus, pylorus of the stomach, distal duodenum, ascending colon, descending colon and anal canal.
== History == The ability of a soapy solution to act as a detergent has been recognized for centuries. However, it was only at the beginning of the twentieth century that the constitution of such solutions was scientifically studied. Pioneering work in this area was carried out by James William McBain at the University of Bristol. As early as 1913, he postulated the existence of "colloidal ions" to explain the good electrolytic conductivity of sodium palmitate solutions. These highly mobile, spontaneously formed clusters came to be called micelles, a term borrowed from biology and popularized by G.S. Hartley in his classic book Paraffin Chain Salts: A Study in Micelle Formation. The term micelle was coined in nineteenth century scientific literature as the ‑elle diminutive of the Latin word mica (particle), conveying a new word for "tiny particle".
Gonnet, GH; Cohen, MA; Benner, SA (5 June 1992). "Exhaustive matching of the entire protein sequence database". Science. 256 (5062): 1443–5. doi:10.1126/science.1604319. PMID 1604319. – 1992 work presenting a PAM250 from a larger set of proteins than what Dayhoff had access to Jones, David T.; Taylor, William R.; Thornton, Janet M. (1992). "The rapid generation of mutation data matrices from protein sequences". Bioinformatics. 8 (3): 275–282. doi:10.1093/bioinformatics/8.3.275. – JTT model of 1992, with a clustering process to hopefully reduce the errors from a parismony assumption (i.e. assumption that each observed change happens directly, without intermediate changes; see discussion in doi:10.1093/oxfordjournals.molbev.a003851) Kosiol, Carolin; Goldman, Nick (February 2005). "Different Versions of the Dayhoff Rate Matrix". Molecular Biology and Evolution. 22 (2): 193–199. doi:10.1093/molbev/msi005. – analyses the extant variants of Dayhoff-PAM and proposes Direct Computation with Mutabilities (DCMut) variants of them.
Cyclodextrins were called "cellulosine" when first described by A. Villiers in 1891. Soon after, F. Schardinger identified the three naturally occurring cyclodextrins: α, β, and γ, referred to as "Schardinger sugars". For 25 years, between 1911 and 1935, Hans Pringsheim in Germany was the leading researcher in this area, demonstrating that cyclodextrins formed stable aqueous complexes with many other chemicals. By the mid-1970s, each of the natural cyclodextrins had been structurally and chemically characterized and many more complexes had been studied. Since the 1970s, extensive work has been conducted by Szejtli and others exploring encapsulation by cyclodextrins and their derivatives for industrial and pharmacologic applications. Among the processes used for complexation, the kneading process seems to be one of the best.
=== Potential treatment for osteoporosis === Osteoporosis is a bone disease where bone mass is less than the average and can increase fractures. Some causes that lead to osteoporosis is how old you are, and decreasing amount of estrogen, which is why it mainly occurs in older women (however it can also impact men as well). During a recent study performed at Children's Medical Center Research Institute at UT Southwestern, Bone Growth Factor Osteolectin (Clec11a) has also shown regenerative properties. Ovaries were removed from mice to simulate osteoporosis of post menopausal women. Results were based on daily injections of Osteolectin to determine the effects. This research showed an increase in bone volume of mice with bone loss after their ovaries were removed. To be more specific, in order to help people with osteoporosis, medication is used along with treating bone fractures. Clec11a is a glycoprotein that bone marrow expresses which Elifesciences states.
Sources: en.wikipedia.org
assistance to Mexican security forces has conflicted with the Leahy Law, which prohibits aid to units implicated in human rights abuses, pointing to cases where trained units were later accused of violations.
Membrane Receptor-mediated elevation of vascular smooth muscle cGMP Inhibition of the effects of catecholamines Promotes uterine spiral artery remodeling, which is important for preventing pregnancy-induced hypertension.
Dextromoramide (Palfium, Palphium, Jetrium, Dimorlin) is a powerful opioid analgesic approximately three times more potent than morphine but shorter acting. It is subject to drug prohibition regimes, both internationally through UN treaties and by the criminal law of individual nations, and is usually prescribed only in the Netherlands.
Diabetes, Obesity and Metabolism is a monthly peer-reviewed medical journal established in 1999 covering research on diabetes, obesity, and metabolism. The journal has a 2024 Clarivate impact factor of 5.7. The journal publishes on topics such as pharmacokinetics and pharmacodynamics, cost-effectiveness, real world evidence of drug utilisation, safety and effectiveness, as well as conventional randomized controlled trials (phase I-IV studies).
Sources: en.wikipedia.org
It is a solid form of creatine that contains one water molecule per creatine molecule in the crystal lattice. The hydrate water is part of the crystal structure rather than loose moisture. The term is often used for the common crystalline powder grade.
Creatine anhydrous lacks the water of crystallization and therefore contains a higher creatine fraction by mass. The monohydrate is more common in commerce and research because it is stable and easy to handle. The two forms are not identical in solid state, though both yield creatine when dissolved.
Creatine is the base molecule, while creatine monohydrate is a hydrate of that molecule. Once dissolved, the hydrate water becomes part of the solvent and free creatine is present. In casual usage the names are often shortened to creatine, but the solid forms differ.
A sealed container kept at room temperature and away from moisture is typical. Heat and humidity promote conversion to creatinine and can reduce assay values. Long-term storage under dry conditions helps maintain the original crystalline form.