Creatine monohydrate raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
This page was last updated on 2026-04-05 and is reviewed periodically as new material appears.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical formula | C4H11N3O3·H2O | Hydrated form includes one water molecule per creatine unit. |
| Molar mass | 149.15 g/mol | Calculated for the monohydrate form. |
| Appearance | White crystalline powder | Common commercial grade is odorless or nearly odorless. |
| Solubility in water | Moderately soluble | Solubility increases with temperature and depends on pH. |
| Common synonyms | Creatine hydrate; N-methylguanidinoacetic acid | Monohydrate distinguishes it from anhydrous creatine. |
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.
Creatine is synthesized endogenously in humans, mainly in the liver, kidney, and pancreas, from the amino acids arginine, glycine, and methionine. Skeletal muscle stores much of the body's creatine, where it participates in the phosphocreatine system that buffers adenosine triphosphate during short, intense contractions. Dietary sources include meat and fish, so omnivorous diets provide additional creatine beyond endogenous production. Supplemental creatine monohydrate supplies the same molecule found in food and tissues, not a distinct drug or hormone. Research interest centers on its role in cellular energy transfer and its effects on muscle and other tissues.
In the body, creatine is synthesized from the amino acids arginine, glycine, and methionine, primarily in the liver and kidneys. It is transported to muscle and other tissues, where it is phosphorylated to phosphocreatine by creatine kinase. This phosphagen system provides a rapid source of adenosine triphosphate during short, intense contractions. Dietary creatine comes mainly from meat and fish, and the body's total pool is influenced by both synthesis and intake.
As a supplement, creatine monohydrate is studied for its effects on muscle performance and recovery. The compound is often described as an ergogenic aid, meaning it may support physical work capacity. Research typically compares it with placebo or other forms, such as citrate or nitrate, under controlled conditions. Questions remain about the optimal dose and long-term effects in different populations, and findings are not uniform across all studies. The monohydrate form remains the most extensively tested.
Richards echoed this sentiment, writing in a 2007 review, "[psychedelic] mushroom use may constitute one technology for evoking revelatory experiences that are similar, if not identical, to those that occur through so-called spontaneous alterations of brain chemistry." A group of researchers from Johns Hopkins School of Medicine led by Roland Griffiths conducted a study to assess the immediate and long-term psychological effects of the psilocybin experience, using a modified version of the mystical experience questionnaire and a rigorous double-blind procedure. When asked in an interview about the similarity of his work to Leary's, Griffiths explained the difference: "We are conducting rigorous, systematic research with psilocybin under carefully monitored conditions, a route which Dr. Leary abandoned in the early 1960s." Experts have praised the National Institute of Drug Abuse-funded study, published in 2006, for the soundness of its experimental design. In the experiment, 36 volunteers with no experience with hallucinogens were given psilocybin and methylphenidate (Ritalin) in separate sessions; the methylphenidate sessions served as a control and psychoactive placebo. The degree of mystical experience was measured using a questionnaire developed by Ralph W. Hood; 61% of subjects reported a "complete mystical experience" after their psilocybin session, while only 13% reported such an outcome after their experience with methylphenidate.
The Asilomar Conference in 1975 established widespread agreement that recombinant techniques were insufficiently understood and needed to be tightly controlled. The DNA transmission capabilities of Agrobacterium have been vastly explored in biotechnology as a means of inserting foreign genes into plants. Shortly after the Asilomar Conference, Marc Van Montagu and Jeff Schell discovered the gene transfer mechanism between Agrobacterium and plants, which resulted in the development of methods to alter the bacterium into an efficient delivery system for genetic engineering in plants. The plasmid T-DNA that is transferred to the plant is an ideal vehicle for genetic engineering. This is done by cloning a desired gene sequence into T-DNA binary vectors that will be used to deliver a sequence of interest into eukaryotic cells. This process has been performed using the firefly luciferase gene to produce glowing plants. This luminescence has been a useful device in the study of plant chloroplast function and as a reporter gene. It is also possible to transform Arabidopsis thaliana by dipping flowers into a broth of Agrobacterium: the seed produced will be transgenic. Under laboratory conditions, T-DNA has also been transferred to human cells, demonstrating the diversity of insertion application. The mechanism by which Agrobacterium inserts materials into the host cell is by a type IV secretion system which is very similar to mechanisms used by pathogens to insert materials (usually proteins) into human cells by type III secretion.
In 1977, Bush established Arbusto Energy, a small oil exploration company, which began operations in 1978. He later changed the name to Bush Exploration. In 1984, his company merged with the larger Spectrum 7, and Bush became chairman. The company was hurt by decreased oil prices, and it folded into Harken Energy Corporation, with Bush becoming a member of Harken's board of directors. Questions of possible insider trading involving Harken arose, but a Securities and Exchange Commission investigation concluded that the information Bush had at the time of his stock sale was not sufficient to constitute insider trading. In April 1989, Bush arranged for a group of investors to purchase a controlling interest in Major League Baseball's Texas Rangers for $89 million and invested $500,000 himself to start. He was then the managing general partner for five years. He actively led the team's projects and regularly attended its games, often choosing to sit in the open stands with fans. Bush's sale of his shares in the Rangers in 1998 brought him over $15 million from his initial $800,000 investment. In the early or mid 1990s, before his gubernatorial campaign, Bush briefly considered running for Commissioner of Baseball.
Sources: en.wikipedia.org
=== EC 1.4.1 With NAD+ or NADP+ as acceptor === EC 1.4.1.1: alanine dehydrogenase EC 1.4.1.2: glutamate dehydrogenase EC 1.4.1.3: glutamate dehydrogenase (NAD(P)+) EC 1.4.1.4: glutamate dehydrogenase (NADP+) EC 1.4.1.5: L-amino-acid dehydrogenase EC 1.4.1.6: deleted, Now included with EC 1.21.4.1, D-proline reductase (dithiol) EC 1.4.1.7: serine 2-dehydrogenase EC 1.4.1.8: valine dehydrogenase (NADP+) EC 1.4.1.9: leucine dehydrogenase EC 1.4.1.10: glycine dehydrogenase EC 1.4.1.11: L-erythro-3,5-diaminohexanoate dehydrogenase EC 1.4.1.12: 2,4-diaminopentanoate dehydrogenase EC 1.4.1.13: glutamate synthase (NADPH) EC 1.4.1.14: glutamate synthase (NADH) EC 1.4.1.15: lysine dehydrogenase EC 1.4.1.16: diaminopimelate dehydrogenase EC 1.4.1.17: N-methylalanine dehydrogenase EC 1.4.1.18: lysine 6-dehydrogenase EC 1.4.1.19: tryptophan dehydrogenase EC 1.4.1.20: phenylalanine dehydrogenase EC 1.4.1.21: aspartate dehydrogenase EC 1.4.1.22: there is no overall consumption of NAD+ during the reaction. As a result, transfer of the enzyme from EC 4.3.1.12 was not necessary and EC 1.4.1.22 was withdrawn before being made official EC 1.4.1.23: valine dehydrogenase (NAD+) EC 1.4.1.24: 3-dehydroquinate synthase II EC 1.4.1.25: L-arginine dehydrogenase EC 1.4.1.26: 2,4-diaminopentanoate dehydrogenase (NAD+) EC 1.4.1.27: glycine cleavage system
and above a critical temperature, the self-assembly process will become progressively less likely to occur and spontaneous self-assembly will not happen. The self-assembly is governed by the normal processes of nucleation and growth. Small assemblies are formed because of their increased lifetime as the attractive interactions between the components lower the Gibbs free energy. As the assembly grows, the Gibbs free energy continues to decrease until the assembly becomes stable enough to last for a long period of time. The necessity of the self-assembly to be an equilibrium process is defined by the organization of the structure which requires non-ideal arrangements to be formed before the lowest energy configuration is found. Kinetics The ultimate driving force in self-assembly is energy minimization and the corresponding evolution towards equilibrium, but kinetic effects can also play a very strong role. These kinetic effects, such as trapping in metastable states, slow coarsening kinetics, and pathway-dependent assembly, are often viewed as complications to be overcome in, for example, the formation of block copolymers. Amphiphile self-assembly is an essential bottom-up approach of fabricating advanced functional materials. Self-assembled materials with desired structures are often obtained through thermodynamic control. Here, we demonstrate that the selection of kinetic pathways can lead to drastically different self-assembled structures, underlining the significance of kinetic control in self-assembly.
== Metabolism == Metabolism of 1,3-dibromopropane was examined in 1981. The examination was done by orally administering 1,3-dibromopropane to rats and collecting results 24 hours after administration. Results were obtained from three sources: urine, faeces, and expired air. Upon analysis of the urinary results, researchers discovered the formation of metabolite, N-acetyl-S-(1-bromo-3-propyl)-cysteine and the decline in the GSH content of the liver of the rats. This led to the assumption that 1,3-dibromopropane could have reacted with GSH after administration and gave rise to 1-bromo-3-propyl-S-glutathione, which ultimately form the urinary metabolite. Moreover, due to little radioactivity observed from feces and the confirmation from maintained blood levels of radioactivity proved the occurrence of biliary excretion of sulfur-containing metabolites and enterohepatic cycling.
Sources: en.wikipedia.org
By the time Ferdinand Marcos' second term began, sugar had become a critical Philippine export, responsible for 27% of the county's total foreign exchange earnings. With international sugar prices rising rapidly through the early 1970s, Marcos decided to put domestic and international sugar trading under government control, first through the Philippine Exchange Co. (Philex), and later through the Philippine Sugar Commission (Philsucom) and its trading arm, the National Sugar Trading Corporation (NASUTRA), which were both controlled by Marcos crony Roberto Benedicto. However, the international price of sugar eventually crashed, dramatically hurting the livelihoods of poor farmers. The NASUTRA monopoly forced many sugar planters into bankruptcy or deep in debt. In 1984, over 190,000 sugar workers lost their livelihood, and about a million sacadas and their families in Negros suffered in what would later become known as the "Negros Famine."
Bian Que (Chinese: 扁鵲, Wade–Giles: Pien Ch'iao, c. 300 BC) was a legendary Chinese internist and surgeon who reportedly used general anesthesia for surgical procedures. It is recorded in the Book of Master Han Fei (c. 250 BC), the Records of the Grand Historian (c. 100 BC), and the Book of Master Lie (c. 300 AD) that Bian Que gave two men, named "Lu" and "Chao", a toxic drink which rendered them unconscious for three days, during which time he performed a gastrostomy upon them. Hua Tuo (Chinese:華佗， c. 140–208 AD) was a Chinese surgeon of the 2nd century AD. According to the Records of Three Kingdoms (c. 270 AD) and the Book of the Later Han (c. 430 AD), Hua Tuo performed surgery under general anesthesia using a formula he had developed by mixing wine with a mixture of herbal extracts he called mafeisan (麻沸散). Hua Tuo reportedly used mafeisan to perform even major operations such as resection of gangrenous intestines. Before the surgery, he administered an oral anesthetic potion, probably dissolved in wine, in order to induce a state of unconsciousness and partial neuromuscular blockade. The exact composition of mafeisan, similar to all of Hua Tuo's clinical knowledge, was lost when he burned his manuscripts, just before his death. The composition of the anesthetic powder was not mentioned in either the Records of Three Kingdoms or the Book of the Later Han. Because Confucian teachings regarded the body as sacred and surgery was considered a form of body mutilation, surgery was strongly discouraged in ancient China.
A nanodisc is a synthetic model membrane system which assists in the study of membrane proteins. Nanodiscs are discoidal proteins in which a lipid bilayer is surrounded by molecules that are amphipathic molecules including proteins, peptides, and synthetic polymers. It is composed of a lipid bilayer of phospholipids with the hydrophobic edge screened by two amphipathic proteins. These proteins are called membrane scaffolding proteins (MSP) and align in double belt formation. Nanodiscs are structurally very similar to discoidal high-density lipoproteins (HDL) and the MSPs are modified versions of apolipoprotein A1 (apoA1), the main constituent in HDL. Nanodiscs are useful in the study of membrane proteins because they can solubilise and stabilise membrane proteins and represent a more native environment than liposomes, detergent micelles, bicelles and amphipols. The art of making nanodiscs has progressed past using only the MSPs and lipids to make particles, leading to alternative strategies like peptide nanodiscs that use simpler proteins and synthetic nanodiscs that do not need any proteins for stabilization.
Medical reports describing individuals affected by FOP date back to Dr. Guy Patin in 1648. FOP was originally called myositis ossificans progressiva and was thought to be caused by muscular inflammation (myositis) that caused bone formation. In 1736, London surgeon, John Freke wrote the first case report of FOP, describing a 14-year-old boy that exhibited "'many large swellings on his back, that arise from all the vertebrae of the neck and reach down to the os sacrum. They likewise arise from every rib of his body, and joining together in all parts of his back, as the ramifications of coral do, they make, as it were, a fixed bony pair of bodice." The disease was renamed by Victor A. McKusick in 1970 following the discovery that soft tissue other than muscles (e.g. ligaments) were also affected by the disease process. The best known FOP case is that of Harry Eastlack (1933–1973). His condition began to develop at the age of ten, and by the time of his death from pneumonia in November 1973, six days before his 40th birthday, his body had completely ossified, leaving him able to move only his lips. Eastlack never met another person with FOP during his lifetime. Eastlack donated his body to science and his skeleton is now at the Mütter Museum in Philadelphia, and has proven to be an invaluable source of information in the study of FOP. Another person with FOP, Carol Orzel (April 20, 1959 – February 2018), also donated her body to the museum. Her skeleton was placed on exhibit there, adjacent to Eastlack's, in February 2019.
Sources: en.wikipedia.org
In common usage, yes, but technically creatine monohydrate is one specific hydrated salt form. Other creatine forms exist and differ in composition and properties. The monohydrate is the most studied and most widely available grade.
Yes. Each creatine molecule in the crystal is associated with one water molecule. That water contributes to the total mass but is not part of the creatine molecule itself. Heating or drying can remove some or all of this water.
It occurs naturally in meat and fish, and the human body also makes and stores creatine. Food sources provide varying amounts depending on the type and preparation. The compound is not considered an essential dietary nutrient for adults because the body can synthesize it.
Creatine is the base compound, while creatine monohydrate is a solid crystalline form that contains one water molecule per creatine molecule. Once dissolved, the monohydrate dissociates and releases creatine, which can participate in cellular energy metabolism. The monohydrate is the form most commonly used in research and commercial products.