The short version of creatine fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2025-10-20 and is reviewed periodically as new material appears.
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.
Commercial creatine monohydrate is typically manufactured through chemical synthesis, often starting from sarcosine and cyanamide. The resulting material is crystallized, washed, and dried to a specified hydrate content. Finished lots are tested for identity, purity, moisture, and heavy metals before release. Because the compound can cyclize to creatinine under heat or prolonged storage in solution, manufacturers control temperature and humidity during processing. The solid itself is relatively stable when kept dry and sealed, but moisture uptake can cause caking and complicate accurate assay.
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.
In the human body, creatine is synthesized mainly in the liver and kidneys from the amino acids glycine, arginine, and methionine. Dietary sources include meat, fish, and other animal tissues, which supply preformed creatine. Because plant foods contain little or no creatine, dietary intake varies widely among populations. The compound is stored largely in skeletal muscle, where it is converted to phosphocreatine and used to regenerate adenosine triphosphate during short bursts of activity.
Creatine monohydrate is one of several solid forms of creatine described in the literature. Other forms include anhydrous creatine, creatine hydrochloride, and creatine ethyl ester, each with different solubility and stability characteristics. The monohydrate is distinct from creatinine, a spontaneous breakdown compound that forms when creatine loses water and cyclizes. Commercial descriptions sometimes use synonyms such as methylguanidoacetic acid or N-(aminoiminomethyl)-N-methylglycine, which refer to the same base molecule. These names appear in chemical databases and product labels.
Creatine monohydrate is a crystalline compound formed when one molecule of creatine binds with one molecule of water. Creatine itself is a nitrogen-containing organic acid involved in cellular energy transfer, particularly in muscle and nerve tissue. The monohydrate form is the most common solid form used in research and commercial products because it is relatively stable and easy to handle. Its molecular formula is C4H9N3O2·H2O, and its molar mass is about 149.15 grams per mole.
| Property | Value | Notes |
|---|---|---|
| Common analytical method | HPLC-UV | Separation from creatinine and related compounds. |
| Moisture content | Typically 12% theoretical | Monohydrate stoichiometry corresponds to about 12% water by mass. |
| Typical storage temperature | 15–25 °C | Cool, dry, sealed conditions limit moisture uptake. |
| Degradation marker | Creatinine | Formed by cyclization, especially in solution or with heat. |
| Solubility class | Moderately soluble in water | Solubility rises with temperature and varies with pH. |
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.
Creatine monohydrate is a hydrated form of creatine, a nitrogen-containing compound involved in cellular energy metabolism. Its molecular formula is C4H9N3O2·H2O, with a molar mass around 149.15 g/mol. The monohydrate is the most common solid form used in research and commercial settings because it crystallizes readily and remains stable under ordinary conditions. The term monohydrate indicates one water molecule per creatine molecule in the crystal lattice. It appears as a white crystalline powder with low odor.
In the body, creatine is synthesized from arginine, glycine, and methionine, mainly in the liver and kidneys, and is also obtained from foods such as meat and fish. About 95% of body creatine is stored in skeletal muscle, where a fraction is phosphorylated to phosphocreatine. Phosphocreatine serves as a rapid reserve of high-energy phosphate for short bursts of ATP regeneration. The monohydrate form supplies creatine after dissolution and absorption, but it is not itself the active phosphorylated species.
Creatine was first identified in skeletal muscle extracts in the nineteenth century, and its role in phosphagen energy buffering was clarified in the twentieth century. The monohydrate salt became widely studied after methods for inexpensive synthesis and crystallization were developed. Modern research examines its effects on muscle energetics, recovery, and cognitive performance under specific conditions. Findings vary with population, exercise protocol, baseline creatine status, and measurement method. Studies often compare supplementation with placebo during controlled training or testing schedules.
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 the hydrated form of creatine, a nitrogen-containing organic acid involved in cellular energy transfer. Its molecular formula is C4H11N3O3, and it consists of creatine plus one water molecule in the crystal lattice. The anhydrous base, creatine, has the formula C4H9N3O2. The compound appears as a white, odorless, crystalline powder and is classified as a guanidine derivative. It is distinct from creatinine, a breakdown product measured in clinical chemistry.
In animals, creatine is synthesized mainly in liver, kidney, and pancreas from arginine, glycine, and methionine. The first committed step transfers a guanidino group from arginine to glycine, forming guanidinoacetate. Subsequent methylation by S-adenosylmethionine yields creatine. Dietary sources include meat and fish; endogenous synthesis supplies part of the body pool. Most creatine is stored in skeletal muscle, where it is converted to phosphocreatine and participates in rapid regeneration of adenosine triphosphate during short, intense activity.
Commercial creatine products appear in several forms, including monohydrate, hydrochloride, citrate, nitrate, and ethyl ester. Creatine monohydrate is the most studied form and serves as a reference material in comparative research. Different forms vary in solubility, pH, and water content, but they share creatine as the active moiety after dissolution. Claims that one form is uniformly superior remain debated, and study designs often differ in population, exercise protocol, and outcome measures. Purity and hydration state are central to interpreting product labels.
=== Anesthesia === The use of ketamine in anesthesia reflects its characteristics. It is a drug of choice for short-term procedures when muscle relaxation is not required. The effect of ketamine on the respiratory and circulatory systems is different from that of other anesthetics. It suppresses breathing much less than most other available anesthetics. When used at anesthetic doses, ketamine usually stimulates rather than depresses the circulatory system. Protective airway reflexes are preserved, and it is sometimes possible to administer ketamine anesthesia without protective measures to the airways. Psychotomimetic effects limit the acceptance of ketamine; however, lamotrigine and nimodipine decrease psychotomimetic effects and can also be counteracted by benzodiazepines or propofol administration. Ketofol is a combination of ketamine and propofol. Ketamine is frequently used in severely injured people and appears to be safe in this group. It has been widely used for emergency surgery in field conditions in war zones, for example, during the Vietnam War. A 2011 clinical practice guideline supports the use of ketamine as a sedative in emergency medicine, including during physically painful procedures. It is the drug of choice for people in traumatic shock who are at risk of hypotension. Ketamine often raises blood pressure upon administration and is unlikely to lower blood pressure in most patients, making it useful in treating severe head injuries for which low blood pressure can be dangerous.
The welfare of farmed insects concerns treatment of insects raised for animal feed, as food or pet food, and other purposes such as honey and silk, for use in generating recombinant proteins, or for biological control applications.
A randomized trial is "Blind" if the participant is not told which arm of the trial he is on. A clinical trial is "Blind" if participants are unaware on whether they are in the experimental or control arm of the study; also called masked. (NLM) A procedure in which one or more parties to the trial are kept unaware of the treatment assignment(s). Single blinding usually refers to the subject(s) being unaware, and double blinding usually refers to the subject(s), investigator(s), monitor, and, in some cases, data analyst(s) being unaware of the treatment assignment(s). (ICH E6) Blind review
Galloway once received an award from Stonewall and voted to lower the age of consent for homosexuality from 18 to 16. He voted in favour of allowing gay couples to marry in 2013, though he was absent for the third reading of the bill. In 2024, Galloway said, "As a father of six children, I'm socially conservative." In May 2024, Momentum, an organisation supportive of the Labour Party, accused Galloway of "blatant homophobia and opposition to LGBT rights", after Galloway stated in an interview that he did not want children taught that "gay relationships are exactly the same and as normal as a mum, a dad and kids". Galloway said he wanted children taught that "the normal thing in Britain, in society across the world, is a mother, a father and a family". Michael Chessum on The Guardian described what he saw as Galloway's "opposition to transgender rights" while Sian Norris saw "transphobic dog-whistles", as well as "disinformation and conspiracist ideas" regarding transgender people. Galloway has complained in written articles – including for RT – of what he has called "transmania". In 2004, Deborah Ross of The Independent gave Galloway an interview while the latter was driving, in which Galloway stated that he was "strongly against abortion. I believe life begins at conception, and therefore unborn babies have rights. I think abortion is immoral." Galloway reiterated his opposition to abortion in 2024, citing his Catholic faith. Galloway said in 2005, "I have all my life been against abortion and against euthanasia".
Sources: en.wikipedia.org
April 25 Trump is evacuated after a shooting occurs at the White House Correspondents' Dinner. One law enforcement officer is struck in a bullet-resistant vest and is expected to recover. A 31-year-old male suspect is subdued and taken into custody. The US military announces that its strike on an alleged drug boat in the eastern Pacific killed two people. April 26 – 2026 NASCAR Cup Series: In NASCAR, a 26-car pileup occurs during the Jack Link's 500 at the Talladega Superspeedway after driver Bubba Wallace was pushed from outside. April 27 The suspect in the White House Correspondents' Dinner shooting is charged with attempting to assassinate the president, along with weapon offences relating to the incident at the Washington DC Hilton. He does not enter a plea. King Charles and Queen Camilla arrive in the US for a state visit. April 28 – Former FBI director James Comey is indicted on federal charges of threatening the president. The charges are related to a post he made in May 2025, which included a photo of seashells on the beach arranged to spell "86 47". April 29 The Washington Post reports that the USS Gerald R. Ford will exit the Middle East and return to Virginia in the coming days after spending 10 months at sea. Louisiana v. Callais: The Supreme Court, in a 6–3 decision, rules that Louisiana's new redistricting map was an unconstitutional racial gerrymander under the Fifteenth Amendment. April 30 Camp Mystic in Texas withdraws an application to reopen during the summer in the wake of the floods in July 2025.
Adenomatous polyposis coli protein 2 is a protein that in humans is encoded by the APC2 gene. This is a dual-functional protein which is especially prevalant in the developing brain, and involved in cell signaling (specifically Wnt signaling) and stabilizing the cytoskeleton. Frizzled receptors are a type of cell receptor involved in a variety of functions including embryonic development and cell proliferation. These receptors trigger a cascade of reactions called the Wnt signaling pathway that eventually leads to interaction with the DNA via the protein beta-catenin, which affects which proteins get produced by the cell. The APC2 protein promotes the formation of a protein complex which is involved in breaking down the protein beta-catenin. The APC2 protein stabilizes microtubules, which are part of the cell cytoskeleton. It may also be involved in the regulation of actin fibers my means of GTPase activation (specifically the Rho family).
=== Impact === Soon after the publication of Libby's 1949 paper in Science, universities around the world began establishing radiocarbon-dating laboratories, and by the end of the 1950s there were more than 20 active 14C research laboratories. It quickly became apparent that the principles of radiocarbon dating were valid, despite certain discrepancies, the causes of which then remained unknown. The development of radiocarbon dating has had a profound impact on archaeology – often described as the "radiocarbon revolution". In the words of anthropologist R. E. Taylor, "14C data made a world prehistory possible by contributing a time scale that transcends local, regional and continental boundaries". It provides more accurate dating within sites than previous methods, which usually derived either from stratigraphy or from typologies (e.g. of stone tools or pottery); it also allows comparison and synchronization of events across great distances. The advent of radiocarbon dating may even have led to better field methods in archaeology since better data recording leads to a firmer association of objects with the samples to be tested. These improved field methods were sometimes motivated by attempts to prove that a 14C date was incorrect. Taylor also suggests that the availability of definite date information freed archaeologists from the need to focus so much of their energy on determining the dates of their finds, and led to an expansion of the questions archaeologists were willing to research.
Sources: en.wikipedia.org
=== Surface-to-air missiles === Thunderbird (missile) – In use till 1977 for mobile high-altitude air defence. Bloodhound (missile) – Fixed air defence in UK from 1958 till 1991. Blowpipe (missile) – Man portable surface-to-air missile from 1975 till 1985 Rapier (missile) – Came into service at the start of 1970s and at the end replaced Bofors and thunderbird. Used until 2022. Javelin (surface-to-air missile) – Man portable surface-to-air missile replacing Blowpipe in use from 1984 to 1993.
The American kestrel is likely the most abundant falcon in North America, although its total population is difficult to quantify, as local populations can change quickly due to resource availability. Count data from the USGS Breeding Bird Survey (BBS) indicate that the North American breeding population is experiencing long-term and gradual but sustained declines, with some regions, such as New England and coastal California, exhibiting more rapid declines. Count data from raptor migration corridors also indicate regional population declines and largely corroborate BBS data. The North American population has been estimated at 1.2 million pairs, with the Central and South American populations being as large. A smaller estimate is 236,000 birds wintering in North America. A population increase occurred in the 18th and 19th centuries, probably due to deforestation for agriculture. The resulting pastures provided an ideal habitat for kestrels. As of its 2025 IUCN assessment, the global population of American kestrels is estimated to be 9.2 million mature individuals. The southeastern U.S. subspecies (Falco sparverius paulus) has declined 82% since 1940 due to a decrease in nest site availability. This decline is a result of longleaf pines being cleared for agricultural fields. Despite this, the American kestrel is classed as least concern on the IUCN Red List. The Peregrine Fund, a leading non-profit organization advancing research and conservation of birds of prey worldwide, launched the American Kestrel Partnership in 2012.
== Production == As 225Ac does not occur in any appreciable quantities in nature, it must be synthesized in specialized nuclear reactors or accelerators. The majority of 225Ac results from the alpha decay of 229Th, but this supply is limited because the decay of 229Th (half-life 7920 years) is slow. It is also possible to breed 225Ac from radium-226 in the 226Ra(p,2n) reaction. This was first done in 2005, though the production and handling of 226Ra are difficult because of the respective cost of extraction and hazards of decay products such as radon-222. Alternatively, 225Ac can be produced in spallation reactions on a 232Th target irradiated with high-energy proton beams. Current techniques enable the production of millicurie quantities of 225Ac; however, it must then be separated from other reaction products. This is done by allowing some of the shorter-lived nuclides to decay; actinium isotopes are then chemically purified in hot cells and 225Ac is concentrated. Special care must be taken to avoid contamination with the longer-lived beta-emitting actinium-227. For decades, most 225Ac was produced in one facility—the Oak Ridge National Laboratory in Tennessee—further reducing this isotope's availability even with smaller contributions from other laboratories. Additional 225Ac is now produced from 232Th at Los Alamos National Laboratory and Brookhaven National Laboratory. The TRIUMF facility and Canadian Nuclear Laboratories have formed a strategic partnership around the commercial production of actinium-225.
Sources: en.wikipedia.org
Laboratories typically combine chromatographic separation with moisture and elemental analysis. High-performance liquid chromatography can quantify creatine and related substances such as creatinine. Moisture methods confirm the hydrate form and help detect excess water.
The dry crystalline solid is relatively stable when protected from moisture and heat. In solution, it can convert to creatinine over time, especially at higher temperatures. Storage conditions and product form influence the rate of change.
Moisture uptake can cause particles to stick together, particularly in humid conditions or after opening a container. Clumping does not necessarily mean the creatine has degraded. It can make accurate measuring more difficult, so dry storage and sealed packaging are used.
Creatine monohydrate is the hydrated solid form of creatine, a nitrogen-containing compound involved in cellular energy metabolism. It consists of one creatine molecule associated with one water molecule in a crystal lattice.