Everything below concerns Creatine monohydrate. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2025-09-12. Where a claim depends on a specific study, the study is described rather than over-claimed.
Creatine monohydrate is a crystalline compound formed from creatine and one molecule of water. Creatine itself is a nitrogen-containing organic acid that occurs in vertebrate muscle and other tissues. The monohydrate designation refers to the water included in the crystal lattice, not to water added during manufacturing. Its chemical formula is commonly written as C4H9N3O2·H2O. The solid is typically a white, odorless powder with low solubility in water at room temperature. It is one of several creatine forms described in scientific and commercial literature.
The compound was identified in the nineteenth century after chemists isolated a nitrogenous substance from meat extracts. Later work established its role in muscle energy metabolism and its conversion to phosphocreatine. Chemical synthesis of creatine followed, and industrial production made the monohydrate widely available as a purified powder. Interest expanded in the late twentieth century when researchers began studying creatine supplementation and muscle physiology. Historical accounts sometimes differ on exact dates and attributions, but the broad sequence from tissue extracts to synthetic production is well documented.
In the body, creatine is obtained from dietary meat and fish and is also synthesized from arginine, glycine, and methionine. Muscle stores creatine and phosphocreatine, which participate in the rapid regeneration of adenosine triphosphate during short, intense activity. The monohydrate form is used in research because it is chemically defined, stable as a dry solid, and relatively inexpensive to produce. Questions remain about whether other creatine forms offer meaningful advantages in absorption or tissue retention, and findings vary across studies and populations.
Creatine monohydrate is stable under dry, cool conditions but can degrade when exposed to moisture and heat. In solution, it undergoes hydrolysis to creatinine, a cyclic derivative with little role in phosphagen energy transfer. The rate of conversion increases with temperature, storage time, and acidic or alkaline pH. Solid material kept in a sealed container at room temperature generally retains its composition for extended periods. Moisture uptake is a primary concern because it can accelerate breakdown and caking.
Analytical laboratories commonly use high-performance liquid chromatography to separate creatine from creatinine and related impurities. Ion chromatography, nuclear magnetic resonance, and titration assays can also quantify the compound. Water content is measured by Karl Fischer titration or loss on drying, because the monohydrate has a defined theoretical water fraction. Particle size, bulk density, and flowability are physical properties that affect blending and capsule filling. These measurements support quality control and help verify that a lot matches its specification.
Regulatory status varies by country. In the United States, creatine monohydrate is sold as a dietary supplement ingredient, while in the European Union it is placed on the market as a food supplement component. Some jurisdictions have established purity monographs or permitted health claims, while others treat it as a novel food or require notification. Product labels may state the amount of creatine monohydrate or the equivalent creatine content, and the two figures can differ. Independent testing programs sometimes check identity, potency, and contaminant limits.
| Property | Value | Notes |
|---|---|---|
| Chemical formula | C4H9N3O2·H2O | Monohydrate includes one water molecule per creatine molecule |
| Molar mass | 149.15 g/mol | Value for the monohydrate; anhydrous creatine is about 131.13 g/mol |
| Appearance | White crystalline powder | Odorless or nearly odorless in purified form |
| Solubility in water | About 13 g/L at 25 °C | Solubility increases with temperature and varies with pH |
| Common synonyms | Creatine hydrate; N-(aminoiminomethyl)-N-methylglycine | Monohydrate distinguishes it from anhydrous creatine |
Analytical laboratories commonly identify creatine monohydrate by high-performance liquid chromatography with ultraviolet detection, often after dissolving the sample in water or dilute acid. Ion-exchange or reversed-phase columns separate creatine from creatinine and related guanidino compounds. Nitrogen content can be checked by Kjeldahl or combustion methods, while moisture is measured by Karl Fischer titration or loss on drying. These techniques give complementary views: chromatographic purity addresses related substances, whereas moisture and elemental data confirm hydrate stoichiometry. No single test defines quality by itself; a combination is used in specifications.
Storage recommendations generally emphasize a cool, dry place away from direct sunlight and strong oxidizers. Sealed containers limit humidity exchange, which helps prevent clumping and gradual conversion to creatinine. Long-term stability studies usually monitor appearance, moisture, and purity at intervals under defined temperature and humidity conditions. Accelerated tests at elevated temperature can reveal degradation pathways, but they do not perfectly predict room-temperature shelf life. Questions remain about how much creatinine formation is acceptable in different product categories and how packaging choices affect that rate over time.
The term creatine monohydrate is often shortened to creatine in casual usage, though other creatine forms exist, including citrate, nitrate, and hydrochloride salts. These alternative forms differ in solubility, pH behavior, and the amount of creatine delivered per unit mass. Regulatory categories vary by country: some jurisdictions treat it as a food ingredient, while others place it under supplement or drug frameworks depending on claims and presentation. Standard reference texts list it as a naturally occurring nitrogenous organic acid rather than a vitamin or mineral.
Creatine monohydrate is a crystalline organic compound formed from creatine and water in a one-to-one ratio. It belongs to the guanidino family and contains a methylated guanidine group attached to an acetate-like chain. The solid is commonly described as a white, odorless powder with a mildly bitter taste. Its molecular formula is C4H11N3O3·H2O, and the hydrated form is the most widely traded grade. The compound occurs naturally in vertebrate muscle and brain tissue, where it participates in rapid energy buffering.
In aqueous solution, creatine monohydrate exists mainly as a zwitterion, carrying both a positive guanidinium charge and a negative carboxylate charge. This charge separation raises water solubility relative to many neutral organic solids and helps explain its behavior in analytical separations. The monohydrate can lose its water of crystallization under sustained heat or low humidity, converting toward anhydrous creatine. Such transitions matter for mass balance calculations because the hydrate contributes water mass that is not part of the active creatine molecule.
The tandem mass spectrometry data on over 960,000 molecular standards (as of October 2025) is provided to facilitate the identification of chemical entities from tandem mass spectrometry experiments. In addition to the identification of known molecules it is also useful for identifying unknowns using its similarity searching/analysis. All tandem mass spectrometry data comes from the experimental analysis of standards at multiple collision energies and in both positive and negative ionization modes.
MSC-1 measured the electrostatic charge in the spacecraft. MSC-2 was a proton-electron spectrometer. MSC-3 was a tri-axis magnetometer. MSC-10 involved the crew photographing the red-blue Earth limb. Photographs were taken over the Middle East and the southwestern United States; several air fields indicated on charts were identified. The crew had 16 freeze-dried meals and ate all but one of them. As they lacked any means of measuring water intake, they attempted to minimize consumption of it and also reported high amounts of gas bubbles in the water from the water dispenser. They experienced a degree of eye, nose, and throat irritation early in the flight and post-landing. This was attributed to ammonia fumes from the flame retardant used in the cabin, which was changed to a different material on subsequent flights.
As lieutenant governor in 2016, Newsom was the official proponent of Proposition 63. The ballot measure required a background check and California Department of Justice authorization to purchase ammunition, among other gun control regulations. In response to the 2019 mass shooting in Virginia Beach, Newsom called for nationwide background checks on people purchasing ammunition. Later that year, he responded to the Gilroy Garlic Festival shooting by stating his support for the Second Amendment and saying he would like national cooperation controlling "weapons of goddamned mass destruction". He also said, "These shootings overwhelmingly, almost exclusively, are males, boys, 'men'—I put in loose quotes. I do think that is missing in the national conversation." On June 10, 2021, Newsom called federal Judge Roger Benitez "a stone cold ideologue" and "a wholly owned subsidiary of the gun lobby of the National Rifle Association" after Benitez struck down California's statewide ban on assault weapons. While the ban remained in place as the state appealed the ruling, Newsom proposed legislation that would empower private citizens to enforce the ban after the United States Supreme Court declined to strike down the Texas Heartbeat Act, which empowers private citizens to report unauthorized abortions. In 2022, Newsom signed gun control bills passed by the California Legislature.
Sources: en.wikipedia.org
== Discovery == NAPE-PLD is an enzyme activity - a phospholipase, acting on phospholipids found in the cell membrane. It is not homology but the chemical outcome of its activity that classes it as phospholipase D. The enzymatic activity was discovered and characterized in a series of experiments culminating in the 2004 publication of a biochemical purification scheme from which peptide sequencing could be accomplished. Researchers homogenized (finely ground) hearts from 150 rats and subjected the resulting crude lysate to sucrose sedimentation at 105,000 x g to separate the cell membranes from the remainder of the cell. The integral membrane proteins were then solubilized using octyl glucoside and subjected to four column chromatography steps (HiTrap SP HP cation-exchange column, HiTrap Q anion-exchange column, HiTrap Blue affinity column, Bio-Gel HTP hydroxyapatite column). Each of these separates the different types of membrane proteins into different sample containers when the proteins are eluted from the column over time, and by measuring the activity of samples in each container it was possible to track which ones received the active enzyme. Measurement of the enzyme activity was done by thin layer chromatography of a radioactive substrate sensitive to the NAPE-PLD enzymatic activity: Cleavage of the substrate affected where it appeared on the plate when the radiation was detected on a bioimaging analyzer.
From this, a pH, or acidity, can be calculated for aqueous solutions of bases. A base is also defined as a molecule that has the ability to accept an electron pair bond by entering another atom's valence shell through its possession of one electron pair. There are a limited number of elements that have atoms with the ability to provide a molecule with basic properties. Carbon can act as a base as well as nitrogen and oxygen. Fluorine and sometimes rare gases possess this ability as well. This occurs typically in compounds such as butyl lithium, alkoxides, and metal amides such as sodium amide. Bases of carbon, nitrogen and oxygen without resonance stabilization are usually very strong, or superbases, which cannot exist in a water solution due to the acidity of water. Resonance stabilization, however, enables weaker bases such as carboxylates; for example, sodium acetate is a weak base.
==== Administering the department ==== Although the Ministry of Defence already had its own "Management Audit" system, Heseltine insisted on introducing his own version of the MINIS system which he had introduced at the Environment. The Ministry of Defence had a budget of £17 million per annum, and employed 246,000 civilians as well as 300,000 in uniform. Whereas the Department of the Environment had 66 directorates, Defence had 156, each headed by a two-star officer or a civil servant of equivalent seniority. The organisation chart took months to design and covered four large sheets of paper. In the event Heseltine was too preoccupied by the political matters to pay much attention to the MINIs reports which had taken so long to produce. Heseltine disliked dealing with paperwork, and insisted on having plenty of time to take decisions, and that all reports sent to him had to be first run past one of his advisers for comments. Staff numbers fell by 20,000 (one in twelve) during Heseltine's time at Defence, and many services were privatised, including the Royal Ordnance Factories whilst the Royal Navy Dockyards at Devonport and Rosyth were put under private management. The three separate service ministries (Admiralty, War and Air) had merged into a single Ministry of Defence in 1981. Heseltine drew up plans on a flight back from Kuwait to merge the services further, so that the three chiefs of staff reported directly to the Chief of Defence Staff instead of being treated as colleagues, whilst some supply services were to be merged.
Pea proteins have been criticized for their potentially bitter, metallic taste, caused by compounds called saponins. Depending on the method of processing, pea protein can have an undesirably gritty texture. Depending on the method of processing, some pea proteins can contain high levels of anti-nutritional properties such as phytates, lectins, and trypsin inhibitors, which have negative side effects. Trypsin inhibitors decrease the digestion of the protein. Lectins can impede the uptake of glucose, decrease nutrient transport, and create damage to the mucosal layer of the intestines by binding to carbohydrate molecules. Phytates affect the bioavailability and digestibility of the protein by forming complexes with essential dietary minerals such as iron, zinc, and calcium, affecting their absorption.
Sources: en.wikipedia.org
=== EC 1.14.19 With oxidation of a pair of donors resulting in the reduction of O2 to two molecules of water === EC 1.14.19.1: stearoyl-CoA 9-desaturase EC 1.14.19.2: stearoyl-[acyl-carrier-protein] 9-desaturase EC 1.14.19.3: linoleoyl-CoA desaturase EC 1.14.19.4: acyl-lipid (11-3)-desaturase EC 1.14.19.5: acyl-CoA 11-(Z)-desaturase EC 1.14.19.6: acyl-CoA (9+3)-desaturase EC 1.14.19.7: Now EC 1.11.1.23, (S)-2-hydroxypropylphosphonic acid epoxidase EC 1.14.19.8: pentalenolactone synthase EC 1.14.19.9: tryptophan 7-halogenase EC 1.14.19.10: icosanoyl-CoA 5-desaturase EC 1.14.19.11: acyl-[acyl-carrier-protein] 4-desaturase EC 1.14.19.12: acyl-lipid ω-(9-4) desaturase EC 1.14.19.13: acyl-CoA 15-desaturase EC 1.14.19.14: linoleoyl-lipid Δ9 conjugase EC 1.14.19.15: (11Z)-hexadec-11-enoyl-CoA conjugase EC 1.14.19.16: linoleoyl-lipid Δ12 conjugase (11E,13Z-forming) EC 1.14.19.17: sphingolipid 4-desaturase EC 1.14.19.18: sphingolipid 8-(E)-desaturase EC 1.14.19.19: sphingolipid 10-desaturase EC 1.14.19.20: Δ7-sterol 5(6)-desaturase EC 1.14.19.21: cholesterol 7-desaturase EC 1.14.19.22: acyl-lipid ω-6 desaturase (cytochrome b5) EC 1.14.19.23: acyl-lipid (n+3)-(Z)-desaturase (ferredoxin) EC 1.14.19.24: acyl-CoA 11-(E)-desaturase EC 1.14.19.25: acyl-lipid ω-3 desaturase (cytochrome b5) EC 1.14.19.26: acyl-[acyl-carrier-protein] 6-desaturase EC 1.14.19.27: sn-2 palmitoyl-lipid 9-desaturase EC 1.14.19.28: sn-1 stearoyl-lipid 9-desaturase EC 1.14.19.29: sphingolipid 8-(E/Z)-desaturase EC 1.14.19.30: acyl-lipid (8-3)-desaturase EC 1.14.19.31: acyl-lipid (7-3)-desaturase EC 1.14.19.32: palmitoyl-CoA 14-(E/Z)-desaturase EC 1.14.19.33: Δ12 acyl-lipid conjugase (11E,13E-forming) EC 1.14.19.34: acyl-lipid (9+3)-(E)-desaturase EC 1.14.19.35: sn-2 acyl-lipid ω-3 desaturase (ferredoxin) EC 1.14.19.36: sn-1 acyl-lipid ω-3 desaturase (ferredoxin) EC 1.14.19.37: acyl-CoA 5-desaturase EC 1.14.19.38: acyl-lipid Δ6-acetylenase EC 1.14.19.39: acyl-lipid Δ12-acetylenase EC 1.14.19.40: hex-5-enoyl-[acyl-carrier protein] acetylenase EC 1.14.19.41: sterol 22-desaturase EC 1.14.19.42: palmitoyl-[glycerolipid] 7-desaturase EC 1.14.19.43: palmitoyl-[glycerolipid] 3-(E)-desaturase EC 1.14.19.44: acyl-CoA (8-3)-desaturase EC 1.14.19.45: sn-1 oleoyl-lipid 12-desaturase EC 1.14.19.46: sn-1 linoleoyl-lipid 6-desaturase EC 1.14.19.47: acyl-lipid (9-3)-desaturase EC 1.14.19.48: tert-amyl alcohol desaturase EC 1.14.19.49: tetracycline 7-halogenase EC 1.14.19.50: noroxomaritidine synthase EC 1.14.19.51: (S)-corytuberine synthase EC 1.14.19.52: camalexin synthase EC 1.14.19.53: all-trans-retinol 3,4-desaturase EC 1.14.19.54: 1,2-dehydroreticuline synthase EC 1.14.19.55: 4-hydroxybenzoate brominase (decarboxylating) EC 1.14.19.56: 1H-pyrrole-2-carbonyl-[peptidyl-carrier protein] chlorinase EC 1.14.19.57: 1H-pyrrole-2-carbonyl-[peptidyl-carrier protein] brominase EC 1.14.19.58: tryptophan 5-halogenase EC 1.14.19.59: tryptophan 6-halogenase EC 1.14.19.60: 7-chloro-L-tryptophan 6-halogenase EC 1.14.19.61: dihydrorhizobitoxine desaturase EC 1.14.19.62: secologanin synthase EC 1.14.19.63: pseudobaptigenin synthase EC 1.14.19.64: (S)-stylopine synthase EC 1.14.19.65: (S)-cheilanthifoline synthase EC 1.14.19.66: berbamunine synthase EC 1.14.19.67: salutaridine synthase EC 1.14.19.68: (S)-canadine synthase EC 1.14.19.69: biflaviolin synthase EC 1.14.19.70: mycocyclosin synthase EC 1.14.19.71: fumitremorgin C synthase EC 1.14.19.72: (–)-pluviatolide synthase EC 1.14.19.73: (S)-nandinine synthase EC 1.14.19.74: (+)-piperitol/(+)-sesamin synthase EC 1.14.19.75: very-long-chain acyl-lipid ω-9 desaturase EC 1.14.19.76: flavone synthase II EC 1.14.19.77: plasmanylethanolamine desaturase EC 1.14.19.78: decanoyl-[acyl-carrier protein] acetylenase
The body or shaft of the penis is the free portion of the human penis that is located outside of the pelvic cavity. It is the suspended middle portion of the organ, continuous proximally with the internal root and distally with the glans. Unlike the root, the body contains no muscle, consisting mostly of the corpora cavernosa, the corpus spongiosum and the spongy urethra, together with supporting skin, connective tissue, blood and lymphatic vessels and fascia. The corpora cavernosa are intimately bound to one another with a dorsally fenestrated septum, which becomes a complete one before the penile crura. The body of the penis is homologous to the female clitoral body.
=== Histones === Daly was particularly interested in nuclear proteins. She developed methods for the fractionation of nuclear material and the determination of its composition. It was essential to separate cellular material into all of its components, without destroying or losing any of them. She studied histones, proteins found in cell nuclei, and was able to show the amino acid composition of various histone fractions. Her studies of histones with Mirsky provided evidence for lysine-rich histones, in contrast to the arginine-rich histones described by Albrecht Kossel. Histones have since been shown to be important in gene expression. Daly's work on histones is now considered fundamental.
=== October–December 2007: Participatory notes issue === 18,000, 9 October 2007- The SENSEX crossed the 18,000 mark for the first time on 9 October 2007, gaining 788 points, to close at 18,280. The journey from 17,000 to 18,000 took just 8 trading sessions, which is the third fastest 1000-point rise in the history of the SENSEX. 19,000, 15 October 2007- The SENSEX crossed the 19,000 mark for the first time on 15 October 2007, gaining 640 points, to close at 19,059. It took just 4 trading sessions for the SENSEX to move from 18,000 to 19,000. This is the fastest 1000-point rise ever for the index. In addition, the rise from 16,000 to 19,000 in 17 trading sessions sets a record for the fastest 3,000-point rally in the history of the SENSEX. On 16 October 2007, SEBI (Securities & Exchange Board of India) proposed curbs on participatory notes which accounted for roughly 50% of FII investment in 2007. SEBI was not happy with P-notes because it was not possible to know who owned the underlying securities, and hedge funds acting through P-notes might therefore cause volatility in the Indian markets. However the proposals of SEBI were not clear and this led to a knee-jerk crash when the markets opened on the following day (17 October 2007). Within a minute of opening trade, the SENSEX crashed by 1,744 points or about 9% of its value – the biggest intra-day fall in Indian stock markets in absolute terms until then. This led to the automatic suspension of trade for one hour. Finance Minister P.
Oxidation: M(n+1)+ + O−2 → Mn+ + O2 Reduction: Mn+ + O−2 + 2 H+ → M(n+1)+ + H2O2. In human SOD, the active metal is copper, as Cu(II) or Cu(I), coordinated tetrahedrally by four histidine residues. This enzyme also contains zinc ions for stabilization and is activated by copper chaperone for superoxide dismutase (CCS). Other isozymes may contain iron, manganese or nickel. The activity of Ni-SOD involves nickel(III), an unusual oxidation state for this element. The active site nickel geometry cycles from square planar Ni(II), with thiolate (Cys2 and Cys6) and backbone nitrogen (His1 and Cys2) ligands, to square pyramidal Ni(III) with an added axial His1 side chain ligand.
Sources: en.wikipedia.org
It is a crystalline form of creatine that contains one water molecule per creatine molecule. The compound occurs naturally in muscle tissue and is also produced synthetically for research and consumer products. The monohydrate label describes the solid's hydration state.
Creatine monohydrate contains creatine, but the two terms are not strictly interchangeable. The monohydrate includes water in the crystal, while creatine refers to the base molecule. Other creatine forms pair the molecule with different acids or carriers.
Dietary creatine is found mainly in meat and fish. The human body also synthesizes creatine from amino acids in the liver, kidneys, and pancreas. The monohydrate powder used in products is manufactured rather than extracted directly from food.
A sealed container at room temperature, away from moisture and direct heat, is suitable for most solid material. Keeping the lid closed limits water uptake and caking. Long-term storage in a refrigerator is not necessary if the powder remains dry.