This is a working overview of Phosphocreatine, written for readers who want more than a one-paragraph summary but less than a textbook.
Reviewed 2026-05-08. Anything still debated is marked as such rather than presented as settled.
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.
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.
Several creatine forms are sold, including monohydrate, anhydrous, hydrochloride, nitrate, citrate, and blends. Once dissolved, these forms deliver creatine, but they differ in molar mass, solubility, counterions, and water content. Creatine monohydrate has the largest body of published human data among these forms. Questions remain about whether any alternative form offers meaningful advantages in absorption, tolerability, or tissue uptake under practical conditions. The hydrate form's lower creatine content by mass is a compositional fact, not a statement about effectiveness.
Creatine monohydrate is a crystalline compound formed when one molecule of creatine associates with one molecule of water in the solid lattice. Its molecular formula is C4H11N3O3, and its molar mass is about 149.15 grams per mole. The material appears as a white, odorless powder that dissolves sparingly in water at room temperature. The monohydrate designation distinguishes it from anhydrous creatine, which lacks the bound water and has a lower molar mass. This hydrate is the most common commercial form of creatine used in nutritional and research settings.
| Property | Value | Notes |
|---|---|---|
| Typical storage temperature | 15-25 °C | Sealed container; protect from moisture and direct heat. |
| Theoretical water content | About 12.1% | One water molecule per creatine molecule. |
| Primary degradation product | Creatinine | Formed by cyclization, especially in aqueous solution. |
| Common analytical method | HPLC-UV | Used to separate creatine from creatinine and related impurities. |
| Regulatory classification (U.S.) | Dietary supplement ingredient | Other jurisdictions may classify it as a food supplement or novel food depending on rules. |
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.
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 2011, Domino's launched a billboard advertising in New York's Times Square which displayed real time comments from customers, including good, neutral and bad comments. In 2015, Domino's unveiled a "pizza car" that can carry 80 pizzas, sides, two-liter bottles of soda, and dipping sauces. It also has a 140 °F (60 °C) oven on board and is more fuel efficient than a standard delivery car. Officially named the Domino's DXP, the car is a Chevrolet Spark customized by Roush Performance. Once each car reaches 100,000 miles, it will be retired and returned to Roush, where it will be returned to stock form. In 2016, Domino's cooperated with Starship Technologies and applied self-driving robots to deliver pizzas in specific German and Dutch cities. In 2016, Domino's in New Zealand delivered the world's first pizza delivery by unmanned aerial vehicle using the DRU Drone by Flirety. In February 2017, Domino's launched a wedding registry with gifts delivered in the form of Domino's eGift cards. Domino's also worked with Gugu Guru to create a pizza-themed baby registry. Customers have the option of signing up for Domino's pizza package to be served for the event. In June 2019, Domino's announced a partnership with robotics company Nuro. The service is slated to launch in Houston, Texas, with Nuro's custom, self-driving vehicle, R2. In December 2021, the company began offering "surprise frees," or complimentary items as part of a delivery process, of up to $50 million. The move was made to distinguish the company from delivery apps that charged fees.
== Promotion == In March 2006, it was announced that "Come What May," would be released on July 18, 2006. However, the release date for the album was pushed back until August 22. Because of the delay, Stone Sour released a music video for the track "Reborn", which had footage of the band working on the album in the studio. The album's cover artwork was released online on May 20, 2006. Shortly after, it was confirmed by a representative from the band's record label, Roadrunner, that the release date had been brought forward, and the official release date would be August 1, 2006. On July 31, 2006, the day before its release the album was made available online for streaming in its entirety through AOL. On May 22, 2006, the first single from the album, "30/30-150", was made available online as a free MP3 download. A music video for the single was shot with director P.R. Brown in Los Angeles and received a premier on MTV's Headbangers Ball on June 3, 2006. Prior to the release of the second single from the album, "Through Glass", radio stations throughout the US showed high support for the song. A music video for the single was shot with director Tony Petrossian and was released online on June 9, 2006, through Yahoo!. The third single from the album, "Sillyworld", began receiving radio airplay in November 2006. A music video for the single was shot in January 2007 and was released online on March 8, 2007. The fourth single from the album, "Made of Scars", had a music video which was recorded live on April 7, 2007, and was posted online on June 5, 2007.
Dyneins, one of the three major classes of motor protein, are AAA proteins which couple their ATPase activity to molecular motion along microtubules. The AAA-type ATPase Cdc48p/p97 is perhaps the best-studied AAA protein. Misfolded secretory proteins are exported from the endoplasmic reticulum (ER) and degraded by the ER-associated degradation pathway (ERAD). Nonfunctional membrane and luminal proteins are extracted from the ER and degraded in the cytosol by proteasomes. Substrate retrotranslocation and extraction is assisted by the Cdc48p(Ufd1p/Npl4p) complex on the cytosolic side of the membrane. On the cytosolic side, the substrate is ubiquitinated by ER-based E2 and E3 enzymes before degradation by the 26S proteasome.
Studies in the zebrafish Danio rerio show that TBR1 is highly conserved across species. TBR1 cDNA clones from zebrafish were acquired by screening a zebrafish embryo using a phosphorus labeled probe. The TBR1 found in zebrafish (zf-TBR1) has 83-97% amino acid identity to orthologs in humans (hu-TBR1), xenopus (x-EOMES), and mice (mu-TBR1). The zebrafish TBR1 is only expressed in the forebrain, not in other regions of the zebrafish embryo. The evolution of TBR1 has been studied in amphioxi, also known as lancelets. A T-box-containing cDNA was isolated in the lancelet Branchiostoma belcheri and found to possess a T-domain orthologous to that of the T-Brain subfamily of T-box genes, specifically TBR1. However, lancelets lack a true brain and no TBR1 transcripts were found in the neural tissue of the lancelet. This suggests that the neuronal role of TBR1 evolved in vertebrates after the lancelet lineage had already diverged from that of vertebrates. TBR1 both positively and negatively regulates gene expression in postmitotic neurons.
As of 2025, only limited human clinical data on D-ribose-L-cysteine have been published. A small randomized, placebo-controlled pilot trial conducted in 2023 evaluated the effect of a D-ribose-L-cysteine-containing supplement on serum glutathione levels in healthy adults over a 28-day period. According to results released by the study sponsor, participants receiving D-ribose-L-cysteine experienced a statistically significant increase in serum glutathione relative to baseline, with larger increases observed in older participants. The trial has not yet been independently replicated, and full peer-reviewed publication of the data has not been confirmed. Accordingly, the clinical significance of these findings remains preliminary.
Sources: en.wikipedia.org
The impact of this ~10 km asteroid massively altered the 187Os/188Os signature of marine sediments at that time - the average extraterrestrial 187Os/188Os of ~0.13 and the huge amount of Os this impact contributed (equivalent to 600,000 years of present-day riverine inputs) lowered the global marine 187Os/188Os value of ~0.45 to a minimum of ~0.2. Os isotope ratios may also be used as a signal of anthropogenic impact. The same 187Os/188Os ratios that are common in geological settings may be used to gauge the addition of anthropogenic Os through things like catalytic converters. While catalytic converters have been shown to drastically reduce the emission of NOx and CO, they are introducing platinum group elements (PGE) such as Os, to the environment. Other sources of anthropogenic Os include combustion of fossil fuels, smelting chromium ore, and smelting of some sulfide ores. In one study, the effect of automobile exhaust on the marine Os system was evaluated. Automobile exhaust 187Os/188Os has been recorded to be ~0.2 (similar to extraterrestrial and mantle derived inputs). The effect of anthropogenic Os can be seen best by comparing aquatic Os ratios and local sediments or deeper waters. Surface waters thought to be affected have depleted values compared to deep ocean and sediments by a ratio larger than can be explained by cosmic inputs. The alpha decay of 184Os into 180W (with a rate perhaps large enough for detection) has been proposed as a radiometric dating method for osmium-rich rocks or for differentiation of a planetary core.
===== Sweden ===== Cannabidiol is classified as a medical product in Sweden. However, in July 2019, Supreme Court of Sweden ruled that CBD oil with any concentration of THC falls under the narcotic control laws.
Mysore State, colloquially Old Mysore, was a political territory within the Dominion of India and the subsequent Republic of India from 1950 until 1956. The state was formed by renaming the Kingdom of Mysore, with Bangalore replacing Mysore as the state's capital when Parliament passed the States Reorganisation Act in 1956. Mysore State was considerably enlarged when it became a linguistically homogeneous Kannada-speaking state within the Republic of India by incorporating territories from Andhra, Bombay, Coorg, Hyderabad, and Madras States, as well as other petty fiefdoms. It was subsequently renamed Karnataka in 1973.
== Appearance and behaviour == Laboratory mice have retained many of the physical and behavioural characteristics of house mice; however, due to many generations of artificial selection, some of these characteristics now vary markedly. Due to the large number of strains of laboratory mice, it is impractical to comprehensively describe the appearance and behaviour of all of them; however, they are described below for two of the most commonly used strains.
Sources: en.wikipedia.org
== As a drug target == Inhibitors of MTHFR and antisense knockdown of the expression of the enzyme have been proposed as treatments for cancer. The active form of folate, L-methylfolate, may be appropriate to target for conditions affected by MTHFR polymorphisms.
So these glands lubricate not only the part of the hair that is just growing at 0.3 mm per day on the skin surface, but also the more mature hair growth, providing it with a protective layer of fat. FAEEs (nanogram = one billionth of a gram) appear in hair in almost one order of magnitude lower than (the relevant order of magnitude of) EtG (picogram = one trillionth of a gram). It has been technically possible to measure FAEEs since 1993, and the first study reporting the detection of EtG in hair was done by Sachs in 1993. In practice, most hair which is sent for analysis has been cosmetically treated in some way (bleached, permed etc.). It has been proven that FAEEs are not significantly affected by such treatments (Hartwig et al., 2003a). FAEE concentrations in hair from other body sites can be interpreted in a similar fashion as scalp hair (Hartwig et al., 2003b).
Occasionally, Journal Citation Reports assigns an impact factor to new journals with less than two years of indexing, based on partial citation data. The calculation always uses two complete and known years of item counts, but for new titles one of the known counts is zero. Annuals and other irregular publications sometimes publish no items in a particular year, affecting the count. The impact factor relates to a specific time period; it is possible to calculate it for any desired period. For example, the JCR also includes a five-year impact factor, which is calculated by dividing the number of citations to the journal in a given year by the number of articles published in that journal in the previous five years.
Sources: en.wikipedia.org
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.
Heat, moisture, and prolonged time in solution promote conversion to creatinine. The reaction is faster at higher temperatures and at pH values far from neutral. Dry powder is much more stable than dissolved material.
Common methods include high-performance liquid chromatography for creatine and creatinine, plus water-content analysis by Karl Fischer titration. Heavy metals, residual solvents, and microbial limits may also be tested. A specification may list total creatine content and impurity limits.
It is the hydrated crystalline form of creatine, containing one bound water molecule per creatine unit. The compound is commonly used as a nutritional ingredient and as a research material.