The short version of glutathione fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2026-07-12 and is reviewed periodically as new material appears.
Glutathione is a tripeptide composed of glutamate, cysteine, and glycine. Its glutamate-cysteine linkage uses the gamma-carboxyl group of glutamate, a feature that resists standard peptidases. The cysteine residue provides a thiol group, which gives the molecule its reducing character. In cells, glutathione is often the most abundant small-molecule thiol, with concentrations varying widely by tissue and compartment. It exists mainly in a reduced form called GSH, while oxidation produces a disulfide-linked dimer called GSSG.
Biosynthesis proceeds in two ATP-dependent steps. First, glutamate-cysteine ligase joins glutamate and cysteine. Second, glutathione synthetase adds glycine to the intermediate. The pathway is regulated by cysteine availability, enzyme expression, and feedback inhibition by glutathione itself. Liver tissue has a particularly high capacity for synthesis and export. Because the molecule is made inside cells, circulating glutathione reflects a balance of release, uptake, and breakdown rather than simple dietary supply.
Samples for glutathione analysis require careful handling because the compound oxidizes readily and can be consumed by enzymes after collection. Blood is often treated with acid or thiol-blocking agents soon after draw, and plasma should be separated quickly from red blood cells. Tissues are usually snap-frozen or extracted immediately. Aqueous solutions of glutathione are less stable than dry powder and degrade faster at neutral or alkaline pH, in light, or with dissolved oxygen. Repeated freeze-thaw cycles also reduce reliability.
Quality control for glutathione materials checks identity, assay, purity, water content, and disulfide content. Commercial products vary from research-grade powder to dietary supplements, and labels may not distinguish reduced from oxidized forms. In the United States, oral glutathione is commonly sold as a dietary supplement rather than an approved drug, while injectable forms fall under different rules and may require a prescription. Regulatory status differs by country. Analytical certificates, when available, help verify what a material contains, but independent testing remains important for interpretation.
| Property | Value | Notes |
|---|---|---|
| Common name | Glutathione (reduced form) | Often abbreviated GSH |
| Chemical class | Tripeptide | Contains glutamate, cysteine, and glycine |
| Molecular formula | C10H17N3O6S | Refers to the reduced form |
| Molar mass | 307.32 g/mol | Calculated for C10H17N3O6S |
| Appearance | White to off-white powder | Typical laboratory-grade solid |
Glutathione supports several cellular processes beyond direct antioxidant action. It serves as a cofactor for glutathione peroxidase and glutathione S-transferase enzymes, which reduce peroxides and conjugate electrophiles, respectively. The molecule also acts as a reservoir of cysteine, an amino acid that can limit protein synthesis and redox signaling. In human nutrition, oral glutathione is sold as a supplement, but how much intact glutathione reaches tissues after ingestion remains an active research question. Clinical claims about supplementation are not uniformly supported by controlled trials.
Glutathione is a small tripeptide built from glutamic acid, cysteine, and glycine. Its peptide bond between glutamate and cysteine involves the gamma-carboxyl group rather than the usual alpha-carboxyl group. This structure gives the molecule a reactive thiol on the cysteine residue. The reduced form, often abbreviated GSH, is the predominant intracellular species in many cell types. Because the thiol can donate electrons, glutathione participates in redox chemistry and in the conjugation of reactive molecules.
Cells synthesize glutathione through two ATP-dependent steps: glutamate-cysteine ligase joins glutamate and cysteine, and glutathione synthetase adds glycine to form the complete tripeptide. Breakdown occurs through gamma-glutamyl transpeptidase and subsequent peptidase reactions, forming the gamma-glutamyl cycle. Within cells, glutathione also forms a disulfide-linked dimer called GSSG when two GSH molecules react. The balance between GSH and GSSG is widely used as an indicator of oxidative conditions, although the ratio can vary by compartment and tissue.
Glutathione is most stable as a dry powder stored cool and dry, but its thiol group is readily oxidized in solution. Aqueous preparations at neutral or alkaline pH lose GSH faster because the thiolate form reacts with dissolved oxygen and metal ions. Acidic conditions, chelating agents, and oxygen exclusion can slow oxidation, while repeated freeze-thaw cycles promote degradation. Light exposure and trace metals also contribute to loss. Laboratories typically validate stability for their own matrices because degradation rates depend on pH, temperature, concentration, and container materials.
Commercial glutathione is available in research-grade, food-grade, and supplement-grade forms, and purity specifications differ accordingly. Certificates of analysis commonly report identity by nuclear magnetic resonance or mass spectrometry, purity by HPLC, residual solvents, and heavy metals. Reference standards with assigned purity support calibration, while isotopically labeled glutathione can serve as an internal standard for mass spectrometry. For supplements, label claims may not be independently verified, and regulatory oversight varies by country. Verification often involves third-party testing for identity, potency, and contaminants.
ATC code D Dermatologicals is a section of the Anatomical Therapeutic Chemical Classification System, a system of alphanumeric codes developed by the World Health Organization (WHO) for the classification of drugs and other medical products. Codes for veterinary use (ATCvet codes) can be created by placing the letter Q in front of the human ATC code: for example, QD. ATCvet codes without corresponding human ATC codes are cited with the leading Q in the following list.National versions of the ATC classification may include additional codes not present in this list, which follows the WHO version.
Historic England. "Bawdsey Chain Home Station (1309533)". Research records (formerly PastScape). Retrieved 9 October 2015. Historic England. "Great Bromley Chain Home Station (1476819)". Research records (formerly PastScape). Retrieved 9 October 2015. Historic England. "Canewdon Chain Home Station (1412472)". Research records (formerly PastScape). Retrieved 9 October 2015. Historic England. "Dunkirk Chain Home Station (1377189)". Research records (formerly PastScape). Retrieved 9 October 2015. Historic England. "High Street Chain Home Station (1476863)". Research records (formerly PastScape). Retrieved 9 October 2015. Historic England. "Pevensey Chain Home Station (1476551)". Research records (formerly PastScape). Retrieved 9 October 2015. Historic England. "Rye Chain Home Station (1476520)". Research records (formerly PastScape). Retrieved 9 October 2015. Historic England. "Ventnor Chain Home Station (1306901)". Research records (formerly PastScape). Retrieved 9 October 2015. Early Radar Memories Archived 2 September 2010 at the Wayback Machine Memories of Sgt. Jean Semple, one of Britain's pioneer radar operators RAF Bawdsey Chain Home Radar Station at Subterranean Britain RAF Radar Museum RAF High Street picture Life at Darsham Deprecated link archived 19 April 2013 at archive.today – BBC Great Baddow Chain Home Mast & Radar Anniversary Chain Home Radar – A Personal Reminiscence, M Scanlan, GEC Review, 1993 Early radar development in the UK at purbeckradar.co.uk 60 (Signals) Group, Fighter Command Archived 16 November 2017 at the Wayback Machine (pdf)
His company teamed up with the Orchestre de la Suisse Romande (OSR) to record the world's first holographic symphonic performance presented at Artgenève 2024. In 2025, Orunesu's company, Cybel’Art, developed and launched Virtual Hall, a virtual reality application designed for symphonic performances, belonging to Orchestre de la Suisse Romande. The platform enables users to view concerts from various on-stage perspectives using 360-degree immersive video. Orunesu is credited as the architect and inventor of the technology, which integrates multi-camera setups and synchronized audio-visual processing. Virtual Hall was first presented at Artgenève 2025. In October 2025, Orunesu used his Virtual Hall immersive technology to document a performance of Beethoven’s Ninth Symphony held to mark the 750th anniversary of Lausanne Cathedral. The project used a capture setup with 11 360-degree cameras and 33 microphones. The performance, titled “The Ninth Symphony in Nine Luminous Scenes,” was conceived by Renato Häusler (Kalalumen) and involved more than 270 participants, including musicians, choir members, and lighting technicians. In 2026, Pierluigi Christophe Orunesu, founder of Swiss ArtTech company Cybel'Art SA, collaborated with legendary Tolkien illustrator John Howe at La Tour du Fantastique in Neuchâtel, Switzerland.
=== Hyperglycemia === A patient is considered to have hyperglycemia (high glucose) if the patient has a sugar level of greater than 230–270 mg/dL (13–15 mmol/L). Sometimes the patient may be temporarily hyperglycemic under certain conditions (e.g. not eating regularly, or after strenuous exercise). Patients should closely monitor their sugar levels to ensure that they reduce rather than continue to remain high. High blood sugar levels are not as easy to detect as hypoglycemia and usually happens over a period of days rather than hours or minutes. If left untreated, this can result in diabetic coma and death. Prolonged and elevated levels of glucose in the blood, which is left unchecked and untreated, will, over time, result in serious diabetic complications in those susceptible and sometimes even death. There is currently no way of testing for susceptibility to complications. Diabetics are therefore recommended to check their blood sugar levels either daily or every few days. There is also diabetes management software available from blood testing manufacturers which can display results and trends over time.
Sources: en.wikipedia.org
A Rhodesian Trade Office was opened in Lisbon in order to co-ordinate breaking the anticipated sanctions in the event of a unilateral declaration of independence later that year, which encouraged Smith not to compromise. In its turn, the Rhodesian Trade Office in Lisbon functioned as a de facto embassy and caused tension with London, which objected to Rhodesia conducting its own foreign policy. As land-locked Rhodesia bordered the Portuguese colony of Mozambique, Salazar's promise of "maximum support" from Portugal in breaking the anticipated sanctions gave Smith more grounds for self-confidence in his talks with London. Smith ruled out acceptance for all five of the British principles as they stood, implying instead that Rhodesia was already legally entitled to independence—a claim that was overwhelmingly endorsed by the predominantly white electorate in a referendum. Emboldened by the results of this referendum and the subsequent general election, the Rhodesian government threatened to declare independence without British consent. Harold Wilson countered by warning that such an irregular procedure would be considered treasonous, although he specifically rejected using armed force to quell a rebellion by English "kith and kin", or white Rhodesians of predominantly British descent and origin, many of whom still possessed sympathies and family ties to the United Kingdom. Wilson's refusal to consider a military option further encouraged Smith to proceed with his plans.
== Function == Adiponectin is a protein hormone that modulates a number of metabolic processes, including glucose regulation and fatty acid oxidation. Adiponectin is secreted from adipose tissue (and also from the placenta in pregnancy) into the bloodstream and is very abundant in plasma relative to many hormones. High adiponectin levels correlate with a lower risk of diabetes mellitus type 2. Plasma levels of adiponectin are lower in obese subjects than in lean subjects. Many studies have found adiponectin to be inversely correlated with body mass index in patient populations. However, a meta analysis was not able to confirm this association in healthy adults. Circulating adiponectin concentrations increase during caloric restriction in animals and humans, such as in patients with anorexia nervosa. Furthermore, a 2014 study suggests that adipose tissue within bone marrow, which increases during caloric restriction, contributes to elevated circulating adiponectin in this context. Transgenic mice with increased adiponectin show reduced adipocyte differentiation and increased energy expenditure associated with mitochondrial uncoupling. The hormone plays a role in the suppression of the metabolic derangements that may result in type 2 diabetes, obesity, atherosclerosis, non-alcoholic fatty liver disease (NAFLD) and an independent risk factor for metabolic syndrome. Adiponectin in combination with leptin has been shown to completely reverse insulin resistance in mice.
Fentanyl is contributing to an epidemic of synthetic opioid drug overdose deaths in the United States. From 2011 to 2021, overdose deaths involving prescription opioid (natural and semi-synthetic opioids and methadone) per year remained stable, while synthetic opioid (primarily fentanyl) associated overdose deaths per year increased from 2,600 overdoses to 70,601. Fentanyl was involved in the most drug overdose deaths in the United States in 2018. The United States National Forensic Laboratory estimates fentanyl reports by federal, state, and local forensic laboratories increased from 4,697 reports in 2014 to 117,045 reports in 2020. Fentanyl is often mixed, cut, or ingested alongside other drugs, including cocaine and heroin. Fentanyl has been reported in pill form, including pills mimicking pharmaceutical drugs such as oxycodone. Mixing with other drugs or disguising as a pharmaceutical makes it difficult to determine the correct treatment in the case of an overdose, resulting in more deaths. Emerging adulterants have further complicated the evolving fentanyl supply. In an attempt to reduce the number of overdoses from taking other drugs mixed with fentanyl, drug testing kits, strips, and labs are available.
compared four sterile wound-cleansing solutions (saline, Ringer's solution, Prontosan® and Octenisept®) using a wound coating model consisting of slides containing dried blood plasma or fibrin. The concentration of dissolved proteins was measured and the findings indicate that a surfactant containing solution (polyhexamethylene biguanide with betaine) (Prontosan®) was more effective than saline in removing the protein (adhered dried plasma or fibrin). The proteins in the antiseptic solution (Octenisept®) were denatured and became insoluble. The authors suggest this implies that the antiseptic solution is unsuitable as a 'general' wound cleanser and that its use should be restricted to infected wounds. In a double-blind, randomised, stratified, controlled, parallel-group study the influence of two antiseptics (octenidine, polyhexanide) versus a placebo of Ringer's solution on wound healing in a porcine model was conducted. Assessment of healing was recorded using planimetry and histopathology. At nine days post wounding, the octenidine-treated wounds demonstrated retarded contraction at significantly greater extent than placebo and polyhexanide. At days 18 and 28 the polyhexanide treated wounds supported contraction significantly more than placebo and octenidine. The polyhexanide treated wounds led to complete wound closure after 22.9 days, in comparison to the placebo octenidine treated wounds respectively, 24.1 days (p < 0.05) and 28.3 days (no statistical difference to placebo).
Recipe Unlimited (previously known as Cara Operations) operates Harvey's, Swiss Chalet, Montana's Cookhouse, Kelsey's Neighbourhood Bar & Grill and other brands. The company also provides catering services to airlines. The revenue for its 1200 restaurants and its airline solutions division in 2008 was over $2 billion. Cara Airline Solutions operated about 10 flight kitchens across Canada that served more than 50 air carriers and rail travel customers, it was sold to Gategroup in 2010. Montana's Cookhouse started in 1995, was acquired by Cara in 2002, and operates 90 restaurants across Canada. There are 200 Swiss Chalet restaurants in Canada and the US. New York Fries is another Recipe Unlimited brand with about 200 stores in Canada, Hong Kong, UAE, Kuwait, and South Korea. New York Fries also had a burger company called South St. Burger, that sells burgers along with New York Fries and other products. It was spun off into a separate entity as part of the Cara acquisition. The largest Canadian-established hamburger chain in the nation, Harvey's was founded in Richmond Hill, Ontario, in 1959, it has franchises from Vancouver to St. John's, though most its restaurants are concentrated in southern Ontario and southern Quebec. On March 31, 2016, Cara announced that it would acquire the St-Hubert chain of rotisserie chicken restaurants in the summer of 2016. Recipe Unlimited also owns Prime Restaurants, the parent company of the restaurant chains East Side Mario's, Casey's, Pat and Mario's, Fionn MacCool's and Bier Markt Esplanade. Co-founded in Sudbury in 1980 by Bernard C.
Sources: en.wikipedia.org
Glutathione is a sulfur-containing tripeptide made from glutamate, cysteine, and glycine. It is found in most cells and participates in redox balance and detoxification reactions.
No. It is a tripeptide assembled from three amino acids. The term amino acid applies to the individual building blocks, not to the assembled molecule.
It is present in many tissues, with especially high amounts in liver. Intracellular concentrations are generally much higher than those found in blood plasma.
Common approaches include enzymatic recycling assays, HPLC, and LC-MS/MS. Acid extraction and rapid processing limit oxidation before analysis.