Creatine comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Last reviewed on 2025-10-24. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical formula | C4H11N3O3 | Often written C4H9N3O2·H2O |
| Molar mass | 149.15 g/mol | Anhydrous creatine is 131.13 g/mol |
| Appearance | White crystalline powder | Odorless, fine or granular |
| Water solubility | About 13 g/L at 25 °C | Low; increases with temperature |
| Common synonyms | Creatine hydrate; N-carbamimidoylsarcosine monohydrate | CAS 6020-87-7 |
A biogenic substance is a product made by or of life forms. While the term originally was specific to metabolite compounds that had toxic effects on other organisms, it has developed to encompass any constituents, secretions, and metabolites of plants or animals. In context of molecular biology, biogenic substances are referred to as biomolecules. They are generally isolated and measured through the use of chromatography and mass spectrometry techniques. Additionally, the transformation and exchange of biogenic substances can by modelled in the environment, particularly their transport in waterways. The observation and measurement of biogenic substances is notably important in the fields of geology and biochemistry. A large proportion of isoprenoids and fatty acids in geological sediments are derived from plants and chlorophyll, and can be found in samples extending back to the Precambrian. These biogenic substances are capable of withstanding the diagenesis process in sediment, but may also be transformed into other materials. This makes them useful as biomarkers for geologists to verify the age, origin and degradation processes of different rocks. Biogenic substances have been studied as part of marine biochemistry since the 1960s, which has involved investigating their production, transport, and transformation in the water, and how they may be used in industrial applications. A large fraction of biogenic compounds in the marine environment are produced by micro and macro algae, including cyanobacteria.
== Conclusion == Ion milling revolutionized the fields of material engineering and mechanical engineering, allowing researchers and scientists to obtain high-quality specimens for advanced material analysis. Its applications in various industries and its role in advancing microelectronics make it an indispensable tool for modern research and development.
The capital bill also stipulates the creation of an apprenticeship program in the construction industry to provide part of the labor force necessary. Transportation spending includes money for mass transit and pedestrian paths, with hundreds of millions going to projects involving Chicago. Some major projects are the reconstruction and capacity enhancement of the Kennedy Expressway ($561 million), expanding a train service between Chicago and Rockford ($275 million), and upgrades for the Pace suburban bus service ($220 million). Millions of dollars will be spent on improving the Chicago–St. Louis higher-speed railway, and moving passenger and rail traffic in Springfield to one set of tracks, eliminating a physical barrier. As justification for the multi-billion-dollar spending bill and the accompanying tax hikes, Pritzker said that Illinois had not had a major infrastructure plan for two decades and asserted that improved infrastructure would help drivers on repairs. By 2026, the Rebuild Illinois program had administered $25.6 billion in roadway investments, financing the improvement or expansion of 9,058 route-miles—and over 24,000 lane-miles—of highway and roads, more than 900 bridges, and 1,475 other safety improvements, from routine maintenance projects and minor resurfacings to extensive interstate and bridge reconstructions.
=== Evacuation of Kabul === In August 2021, elements of the 82nd Airborne Division, particularly the Immediate Response Force, deployed to Afghanistan to secure the evacuation of American diplomats and Afghan Special Immigrant Visa applicants as the Taliban seized land and converged on Kabul. Throughout Operation Allies Refuge, the 82nd Airborne Division served as the Operational Command, Task Force 82. Operation Allies Refuge, led by Major General Chris Donahue, was a combined and joint NATO command post composed of forces representing NATO allied Nations, 1st Brigade Combat Team "Devil", aviation capabilities from the 82nd Combat Aviation Brigade "Pegasus", medical capabilities from the 44th Medical Brigade, riot control capabilities from the 16th Military Police Brigade, 24th Marine Expeditionary Unit, and the 3rd Expeditionary Sustainment Command who oversaw sustainment in the joint operational area from a command post in Kuwait.
== Monoprotic and polyprotic bases == Bases with only one ionizable hydroxide (OH−) ion per formula unit are called monoprotic since they can accept one proton (H+). Bases with more than one OH- per formula unit are polyprotic. The number of ionizable hydroxide (OH−) ions present in one formula unit of a base is also called the acidity of the base. On the basis of acidity bases can be classified into three types: monoacidic, diacidic and triacidic.
Sources: en.wikipedia.org
However, benzodiazepines have been used clinically to manage the adverse psychological effects of psychedelics, for instance in clinical studies and in the emergency department. A clinical trial of psilocybin and midazolam coadministration found that midazolam clouded the effects of psilocybin and impaired memory of the experience. Benzodiazepines might interfere with the therapeutic effects of psychedelics, such as sustained antidepressant effects. Some serotonergic psychedelics, for instance dimethyltryptamine (DMT) and 5-MeO-DMT, are highly susceptible substrates for monoamine oxidase (MAO), specifically MAO-A, and hence can be greatly potentiated by monoamine oxidase inhibitors (MAOIs). An example of this is ayahuasca, in which plants containing both DMT and harmala alkaloids acting as MAOIs such as harmine and harmaline are combined. This allows DMT to become orally active and to have a much longer duration of action than usual. The 2C psychedelics, such as 2C-B, 2C-I, and 2C-E, are also substrates of both MAO-A and MAO-B, and may likewise be greatly potentiated by MAOIs. Examples of MAOIs that may potentiate psychedelics behaving as MAO-A and/or MAO-B substrates include phenelzine, tranylcypromine, isocarboxazid, moclobemide, and selegiline. Combination of MAO-substrate psychedelics with MAOIs can result in overdose and serious toxicity, including death. Other psychedelics, such as LSD, are not substrates of MAO and are not potentiated by MAOIs.
=== Endocrine cells === There are many types of specialized endocrine cells that make up the larger tissues and glands of the endocrine system. The endocrine cells release hormones as molecular signals in endocrine signaling that target cells in more distant locations. In animals there are more than fifty such hormones released by the different endocrine glands. The pituitary gland, and the hypothalamus dominate most of the endocrine system. The pituitary gland is in two parts – the anterior pituitary, and the posterior pituitary. The posterior pituitary gland does not produce any hormone but stores and secretes hormones such as antidiuretic hormone (ADH) which is synthesized by supraoptic nucleus of hypothalamus and oxytocin which is synthesized by paraventricular nucleus of hypothalamus. ADH functions to help the body to retain water; this is important in maintaining a homeostatic balance between blood solutions and water. Oxytocin functions to induce uterine contractions, stimulate lactation, and allows for ejaculation. The pineal gland produces melatonin. The follicular cells of the thyroid gland produce and secrete the thyroid hormones T3 and T4 in response to elevated levels of TRH, produced by the hypothalamus, and subsequent elevated levels of TSH, produced by the anterior pituitary, which further regulates the metabolic activity and rate of all cells, including cell growth and tissue differentiation. The parathyroid glands produce and secrete parathyroid hormone in response to low calcium.
Microgravity is the condition of low gravity found in outer space. Some of the major physiological implications that are associated with microgravity are bone loss, immunosuppression, enlargement of bones, muscle loss and movement of body fluids towards the head, spaceflight osteopenia, decrease in the function of cardiovascular system functions, decreased production of red blood cells, balance disorders, and also weaken the human immune system. In addition to this, fluid distribution is increased in the upper body due to the body's ability to pump blood faster to the upper body in microgravity conditions, known as the cephalad fluid shift. In addition, muscle regeneration protein levels have been estimated to vary due to microgravity conditions, including myostatin, activin A, and certain cytokines (e.g. IL-6, IL-10, IL-1ra), which are currently used as targets for drug delivery applications. The effects of microgravity has also investigated in wound healing processes, especially with the behavior of cell populations, such as fibroblasts. For cell studies, a Rotary Cell Culture System was used to mimic cell conditions in microgravity, where the bioreactor rotates horizontally, causing cell sedimentation in the vessel to be offset by the rotating fluid. This results in this light falling of cells, simulated in a microgravity environment. Studies showed a rearrangement of microtubules in cells due to microgravity, forming a dense, puzzled, network, unlike fibroblasts in a normal environment, which exhibit radial parallel formations.
== Production == TMU is obtained by the reaction of dimethylamine with phosgene in aqueous sodium hydroxide in a 2:1 ratio. A similar method combines dimethylcarbamoyl chloride with excess dimethylamine. This reaction is highly exothermic. The removal of the resulting dimethylamine hydrochloride requires some effort.
Sources: en.wikipedia.org
Examining the structure and function of the cornea at the molecular level, Investigating corneal cell biology, and Translational research initiatives dedicated to improving laser refractive surgery techniques that can help address certain complications that can arise following these procedures. Hafezi is considered to be a leading expert and key opinion leader in the development and translation of CXL and its multiple applications in the field of ophthalmology, including the treatment of corneal ectatic disorders like keratoconus, pellucid marginal degeneration and post-LASIK ectasia. Hafezi and his colleagues have also pioneered the use of CXL for the treatment of corneal infections, calling the technique "photoactivated chromophore for infectious keratitis cross-linking", or PACK-CXL. Hafezi has published almost 200 articles in various peer-reviewed scientific journals since 1993, including Nature Medicine, Nature Genetics, Investigative Ophthalmology & Visual Science (IOVS), the Journal of Refractive Surgery, and Cell Death & Differentiation. His work in the field of corneal collagen cross-linking has led him to receive a number of international awards. In 2014, 2016, 2018, 2020, 2023, 2025, and 2026 his peers ranked Hafezi as one of the top 100 most influential people in ophthalmology.
Defining the threshold between periodontal health and gingivitis Introducing reduced periodontium to the classification to take into account patients with loss of attachment in the absence of periodontitis and post-periodontal treatment Introduction of staging and grading system to categorise periodontitis by the severity and biological features instead of the old terms of "chronic periodontitis" and "aggressive periodontitis" Introduction of "Systemic Diseases" and Conditions Affecting the Periodontal Supporting Tissues" A new classification for peri-implant health, peri-implant mucositis and peri-implantitis.
=== Liquid === As a cryogenic liquid, liquid nitrogen can be dangerous by causing cold burns on contact, although the Leidenfrost effect provides protection for very short exposure (about one second). Ingestion of liquid nitrogen can cause severe internal damage. For example, in 2012, a young woman in England had to have her stomach removed after ingesting a cocktail made with liquid nitrogen. Because the liquid-to-gas expansion ratio of nitrogen is 1:694 at 20 °C, a tremendous amount of force can be generated if liquid nitrogen is rapidly vaporised in an enclosed space. In an incident on January 12, 2006, at Texas A&M University, the pressure-relief devices of a tank of liquid nitrogen were malfunctioning and later sealed. As a result of the subsequent pressure buildup, the tank failed catastrophically. The force of the explosion was sufficient to propel the tank through the ceiling immediately above it, shatter a reinforced concrete beam immediately below it, and blow the walls of the laboratory 0.1–0.2 m off their foundations. Liquid nitrogen readily evaporates to form gaseous nitrogen, and hence the precautions associated with gaseous nitrogen also apply to liquid nitrogen. For example, oxygen sensors are sometimes used as a safety precaution when working with liquid nitrogen to alert workers of gas spills into a confined space. Vessels containing liquid nitrogen can condense oxygen from air.
==== Mayker Filema Duarte elected ==== On Friday, September 20, 2024, Acting Grand Master Mayker Filema Duarte was unanimously elected Grand Master of the Grand Lodge of Cuba, during the regular annual and semiannual sessions of the High Chamber of the Grand Lodge of Cuba. Due to the special nature of the circumstances, Filema Duarte was understood to only have been elected to finish-out the rest of the term that Urquía Carreño would have normally completed until the next scheduled semi-annual meeting of the High Chamber in March, 2025, when the elections for the positions at the Grand Lodge usually occur. Over the next six months, many Cuban Freemasons started to believe that Filema Duarte was simply an extension of the same brand of corruption and government abuse that Urquía Carreño had been. He had also been risen through the ranks under the administration of Urquía Carreño. The fact that the Office of Associations and its director Miriam García publicly gave their support to Filema Duarte raised their suspicions, leading them to suspect that he was yet another government puppet. On March 23, 2025, the High Chamber met for their normal semi-annual session (they meet every September and March), and old business was conducted with Filema Duarte presiding. When it was time for new business to be conducted, one of the Freemasons reminded him about holding elections, at which point Filema Duarte suspended the session of the High Chamber. The election did not occur.
Two years later, in 1960, Burris Cunningham and James Wallman of Lawrence Radiation Laboratory of the University of California created the first californium compounds—californium trichloride, californium(III) oxychloride, and californium oxide—by treating californium with steam and hydrochloric acid. The High Flux Isotope Reactor (HFIR) at ORNL in Oak Ridge, Tennessee, started producing small batches of californium in the 1960s. By 1995, HFIR nominally produced 500 milligrams (0.018 oz) of californium annually. Plutonium supplied by the United Kingdom to the United States under the 1958 US–UK Mutual Defence Agreement was used for making californium. The Atomic Energy Commission sold 252Cf to industrial and academic customers in the early 1970s for $10/microgram, and an average of 150 mg (0.0053 oz) of 252Cf were shipped each year from 1970 to 1990. Californium metal was first prepared in 1974 by Haire and Baybarz, who reduced californium(III) oxide with lanthanum metal to obtain microgram amounts of sub-micrometer thick films.
Sources: en.wikipedia.org
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.
Yes, endogenous synthesis occurs mainly in the liver, kidney, and pancreas. Meat and fish also contribute creatine to the diet.
Other forms contain creatine paired with different counterions or lacking water, so their mass and solubility differ. After dissolution, creatine itself is the shared active molecule.
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.