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 2026-01-05 and is reviewed periodically as new material appears.
Within cells, glutathione serves as a cofactor for glutathione peroxidases and glutathione S-transferases. These enzymes reduce hydrogen peroxide and organic peroxides or conjugate electrophilic compounds to the thiol group. The resulting conjugates can be exported and processed through mercapturic acid pathways. Glutathione also contributes to protein thiol homeostasis and to recycling of other antioxidants such as ascorbate. Its precise roles vary by tissue, and many regulatory effects observed in laboratory systems remain difficult to quantify in whole organisms.
Glutathione is a tripeptide composed of glutamate, cysteine, and glycine. It occurs in nearly all living cells, with highest concentrations in liver, kidney, and red blood cells, and exists in reduced (GSH) and oxidized disulfide (GSSG) forms. The cysteine thiol group enables reversible oxidation and reduction reactions. This property makes glutathione a central participant in cellular redox balance. The balance between these forms is often used as an indicator of oxidative stress.
Glutathione synthesis proceeds in two ATP-dependent steps catalyzed by glutamate-cysteine ligase and glutathione synthetase. The first step joins glutamate and cysteine to form gamma-glutamylcysteine and is generally rate-limiting. The second step adds glycine to complete the tripeptide. Cysteine availability, feedback inhibition by glutathione, and oxidative conditions influence flux through this pathway. The pathway is conserved across many organisms, and degradation by gamma-glutamyl transpeptidase and related peptidases recycles amino acids for new synthesis.
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.
| Property | Value | Notes |
|---|---|---|
| Common name | Glutathione | Reduced form is abbreviated GSH |
| Chemical class | Tripeptide | Composed of glutamate, cysteine, and glycine |
| Molar mass | 307.32 g/mol | For reduced glutathione |
| CAS Registry Number | 70-18-8 | For reduced L-glutathione |
| Appearance | White crystalline powder | Typical solid reference material |
Biosynthesis occurs in two ATP-dependent steps. The enzyme glutamate-cysteine ligase joins glutamate and cysteine, forming gamma-glutamylcysteine; glutathione synthetase then adds glycine to produce the complete tripeptide. Because the peptide bond from glutamate uses the gamma-carboxyl group, glutathione resists digestion by many ordinary peptidases. Tissues vary in synthesis capacity, and the liver generally contains high concentrations relative to many other organs. This uneven distribution contributes to organ-specific differences in redox buffering and affects how experimental results are interpreted across tissue types.
Glutathione participates in detoxification reactions, amino acid transport, and the maintenance of protein thiols. It serves as a cofactor for several enzymes, including glutathione peroxidases and glutathione S-transferases. In research literature, altered glutathione status appears in studies of aging, infection, metabolic stress, and environmental exposure. Whether low glutathione is a cause, consequence, or marker of such conditions often remains unresolved. Direct measurement in blood or tissue provides a snapshot, but results depend on sample handling, timing, and the method used.
Glutathione is a small tripeptide made of glutamic acid, cysteine, and glycine. Its cysteine thiol group allows reversible oxidation and reduction, making it central to cellular redox chemistry. The reduced form, often abbreviated GSH, predominates inside most cells, while the oxidized disulfide form, GSSG, forms when two GSH molecules react. The ratio of GSH to GSSG is widely used as an indicator of oxidative stress in laboratory research, though it does not by itself diagnose a clinical condition.
Glutathione is a small tripeptide built from glutamate, cysteine, and glycine. The peptide bond between glutamate and cysteine uses the gamma-carboxyl group, a linkage that resists ordinary peptidases. Cells make it in two ATP-dependent steps: gamma-glutamylcysteine synthetase joins glutamate and cysteine, then glutathione synthetase adds glycine. The pathway is feedback-inhibited by glutathione itself, so intracellular levels tend to stay within a narrow range. Because cysteine is often limiting, sulfur amino acid supply influences how much glutathione a cell can produce.
In its reduced form, glutathione carries a sulfhydryl group that can donate electrons. This property lets it act as a major cellular antioxidant and redox buffer. Glutathione peroxidase uses it to reduce hydrogen peroxide and lipid peroxides, while glutathione reductase regenerates the reduced form using NADPH. The ratio of reduced glutathione to glutathione disulfide is widely used as an indicator of oxidative stress, though the ratio changes with compartment, cell type, and sample handling. Oxidized glutathione can also form mixed disulfides with proteins, affecting their activity.
Their capacities only allow them to be considered equivalent to what are now known as AI Cores, small (in the literal physical sense) Artificial intelligences used in shuttles, trans-light modules, Drones, and other machines not large enough for a full scale Mind. While still considered sentient, a mind's power at this point is considered greatly inferior to a contemporary Mind. That said, It is possible for Minds to have upgrades, improvements and enhancements given to them since construction, to allow them to remain up to date. Using the sensory equipment available to the Culture, Minds can see inside solid objects; in principle they can also read minds by examining the cellular processes inside a living brain, but Culture Minds regard such mindreading as taboo. The only known Mind to break this Taboo, the GCU Grey Area seen in Excession, is largely ostracised and shunned by other Minds as a result. In Look to Windward an example is cited of an attempt to destroy a Culture Mind by smuggling a minuscule antimatter bomb onto a Culture orbital inside the head of a Chelgrian agent. However the bomb ends up being spotted without the taboo being broken. In Consider Phlebas, a typical Mind is described as a mirror-like ellipsoid of several dozen cubic metres, but weighing many thousands of tons, due to the fact that it is made up of hyper-dense matter. It is noted that most of its 'body' only exists in the real world at the outer shell, the inner workings staying constantly within hyperspace.
=== New Zealand === A case was reported in 1989 in a 25-year-old man from New Zealand, who also received dura mater transplant. Five New Zealanders have been confirmed to have died of the sporadic form of Creutzfeldt–Jakob disease (CJD) in 2012.
The isolation and mass spectrometric identification of MHC (major histocompatibility complex) binding peptides Purification and identification of protein antigens binding specific antibodies (or other affinity reagents) Comparative immunoproteomics to identify proteins and pathways modulated by a specific infectious organism, disease or toxin. The identification of proteins in immunoproteomics is carried out by techniques including gel based, microarray based, and DNA based techniques, with mass spectroscopy typically being the ultimate identification method.
=== Global food distribution === Along with Archer Daniels Midland, Bunge, and Cargill, the Louis Dreyfus Company is one of the four "ABCD" companies that dominate world agricultural commodity trading.
==== With thermal imaging ==== Drawing on successful medical research that used thermal imaging to appraise the severity of burns, in 1997 a different group of Canadian researchers used similar technology on recently branded cattle. This was done to determine whether the wounds created by hot and freeze branding remained equally swollen and presumably painful, or if there was a difference in healing between the two methods. Thirty heifers were randomly selected for either hot or freeze branding. Two 25 cm2 patches were shaved on each heifer and the higher of the two was selected for branding, with the other serving as a control. Fifteen of the heifers were hot branded for 3–4 seconds and the others Cryo-branded with copper irons for 22 seconds. A thermographic camera able to measure skin temperatures to ± 0.1 °C was then used to observe the wound and the control at intervals. This gave a proxy for tissue inflammation and, it was thought, the animal's level of discomfort. The temperature of the control site was then subtracted from the temperature of the branding site to give the difference between the two techniques. The data indicated that both methods caused tissue damage, with the freeze brands being warmer and more inflamed than the hot brands at two and eight hours. However, this trend soon reversed and the inflammatory responses triggered by the brandings appeared to diverge rapidly. Hot brand wounds were still significantly warmer than controls one week later, by which time the freeze-branded areas were no warmer than their controls.
Sources: en.wikipedia.org
=== Adaptive immune responses === Plain RNAs may be poor immunogens, but antibodies can easily be created against RNA-protein complexes. These types of antibodies are seen in many autoimmune diseases. There have not yet been reports of antibodies against siRNA bound to proteins. Some methods for siRNA delivery attach polyethylene glycol (PEG) to the oligonucleotide, reducing excretion and improving circulating half-life. However, a large Phase III trial of PEGylated RNA aptamer against factor IX had to be discontinued by Regado Biosciences because of a severe anaphylactic reaction to the PEG part of the RNA. This reaction led to death in some cases and raises significant concerns about siRNA delivery when PEGylated oligonucleotides are involved.
==== Energy ==== The Lula government inaugurated, on 22 March, the first hybrid Renewable energy park in the country authorized by the National Electric Energy Agency (Aneel): the "Neo-energy Renewable Complex – Fountain Wind Farm", which consists of renewable Wind power and solar energy, located in Santa Luzia, Paraíba. In a meeting with the Minister of Mines and Energy, Alexandre Silveira, Lula showed support for the use of electricity derived from renewable sources, in particular for reducing the cost of the service, especially for the poor; goals were also discussed to place Brazil in a "leading global position in the generation of clean energy", in addition to encouraging more sustainable public transport.
This is a list of investigational substance-related disorder drugs, or drugs that are currently under development for clinical use for the treatment of substance-related disorders but are not yet approved. Substance-related disorders include substance use disorders like alcoholism (alcohol use disorder), amphetamine use disorder, cocaine use disorder, nicotine use disorder, and opioid use disorder, among others. In addition, they include substance withdrawal syndromes like alcohol withdrawal and opioid withdrawal as well as substance overdoses like opioid overdose. Chemical/generic names are listed first, with developmental code names, synonyms, and brand names in parentheses. The format of list items is "Name (Synonyms) – Mechanism of Action – Indication [Reference]". This list was last comprehensively updated in January 2026. It is likely to become outdated with time.
Around 2010, large lithium-ion batteries were introduced in place of other chemistries to power systems on some aircraft; as of January 2014, there had been at least four serious lithium-ion battery fires, or smoke, on the Boeing 787 passenger aircraft, introduced in 2011, which did not cause crashes but had the potential to do so. UPS Airlines Flight 6 crashed in Dubai after its payload of lithium batteries spontaneously ignited during flight and severely damaged crucial systems of the aircraft. To reduce fire hazards, research projects are intended to develop non-flammable electrolytes.
Sources: en.wikipedia.org
Derivatives of benzene occur sufficiently often as a component of organic molecules, so much so that the Unicode Consortium has allocated a symbol in the Miscellaneous Technical block, which ranges from U+2300 to U+23FF, with the code U+232C (⌬) to represent it with three alternating double bonds, and U+23E3 (⏣) for a delocalized version.
== Treatment == In May 2023, the US Food and Drug Administration (FDA) approved Vyjuvek for the treatment of wounds in people with dystrophic epidermolysis bullosa with mutation(s) in the collagen type VII alpha 1 chain (COL7A1) gene.
=== Bone Marrow === Bone marrow can be used for testing but that depends on the quality and availability of the bones. So far there is no proof that says that certain bones are better than others when it comes to testing. Extracting bone marrow from larger bones is easier than smaller bones. Forensic toxicologists often use bone marrow to find what type poisons used, which can include cocaine or ethanol. Ethanol specifically is one of the most abused drugs worldwide, be it through alcohol consumption and abuse being a leading cause in death. Suicides, car crashes, and a variety of crimes are often performed under severe alcohol influence. The process of ethanol determination allows forensic toxicologists to utilize bone marrow post-mortem and isolate the ethanol level a person had been, and the metabolic speed of breakdown at which can be traced back to time of death.
Sources: en.wikipedia.org
GSH is the reduced thiol form, while GSSG is the disulfide-linked oxidized dimer. The GSH:GSSG ratio is used as a redox indicator, though the ratio can vary with sample handling and cell type.
Glutathione is present in many foods, including meats, poultry, fish, some vegetables, and fruits. Cooking, storage, and digestion affect the amounts available for absorption.
Yes, both enzymatic steps in glutathione synthesis consume ATP. The first step, catalyzed by glutamate-cysteine ligase, is usually rate-limiting.
It is a tripeptide of glutamic acid, cysteine, and glycine. The linkage between glutamate and cysteine uses the gamma-carboxyl group, which is unusual for peptides.