The short version of GSH fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2026-05-17 and is reviewed periodically as new material appears.
Glutathione supports detoxification by conjugating reactive electrophiles through glutathione S-transferases. The resulting conjugates are processed and exported, often after further metabolism. It also stores cysteine, transports amino acids across membranes through the gamma-glutamyl cycle, and assists in the maturation of iron-sulfur clusters and some prostaglandins. In plants, animals, and many microbes, the molecule appears in similar roles, but concentrations vary enormously between tissues. Liver, kidney, and red blood cells tend to contain high amounts, while blood plasma contains much less.
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.
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.
Functionally, glutathione supports redox balance by donating electrons and becoming oxidized. It also serves as a cofactor for enzymes such as glutathione peroxidases and glutathione S-transferases. These enzymes participate in peroxide reduction and in conjugation reactions that help process reactive molecules. Separate from antioxidant roles, glutathione can modify protein cysteines through S-glutathionylation, influencing enzyme activity and signaling. Research continues to examine how these chemical roles translate into whole-organism effects.
| Property | Value | Notes |
|---|---|---|
| Chemical formula | C10H17N3O6S | Refers to the reduced form |
| Molar mass | 307.32 g/mol | Calculated for the neutral molecule |
| Appearance | White crystalline powder | Often hygroscopic; protect from moisture |
| Water solubility | Soluble in water | Reported values vary with purity and form |
| Alternative names | GSH, reduced glutathione | GSH specifies the thiol form |
== Return to competition == In 1988, the IOC formed the Apartheid and Olympism Commission, including Kevan Gosper, the SCSA, and SANROC. While SANOC agreed it could not seek readmission to the IOC until apartheid was dismantled, negotiations to prepare the way for South Africa's reintegration into world sport proceeded in tandem with the political negotiations to end apartheid. Within South Africa, in each sport there were competing race-specific and multi-racial bodies, which would have to merge into one in order to affiliate into both a nonracial NOC and the IF for its sport. ANOCA took the lead in negotiations in 1990 and 1991, and an Interim National Olympic Committee of South Africa (INOCSA) was formed with Sam Ramsamy as president. Ramsamy had been a leading anti-apartheid campaigner and advocate of sports boycotts. In June 1991, the Population Registration Act, 1950, a cornerstone of apartheid legislation, was repealed by the government of F. W. de Klerk, and in July an INOCSA delegation met with the Apartheid and Olympism Commission at the IOC headquarters in Lausanne. The IOC recognised INOCSA on 9 July 1991, such that the "interim" was removed from its name (NOCSA). It first competed at the 1992 Summer Olympics in Barcelona. The official flag of South Africa and national anthem "Die Stem van Suid-Afrika" were still the apartheid-era ones, but the Olympic team competed under an interim flag and Ludwig van Beethoven's "Ode to Joy". Likewise it decided not to use the Springbok emblem or green-and-gold colours of white sports teams.
Although Fredrickson claims that her experimental results are still valid, these experimental results have also been questioned due to poor statistical methodology, and Alan Sokal has pointed out that "given [Fredrickson and Losada's] experimental design and method of data analysis, no data whatsoever could possibly give any evidence of any nonlinearity in the relationship between "flourishing" and the positivity ratio — much less evidence for a sharp discontinuity." Another study surveyed a U.S. sample of 3,032 adults, aged 25–74. Results showed 17.2 percent of adults were flourishing, while 56.6 percent were moderately mentally healthy. Some common characteristics of a flourishing adult included: educated, older, married and wealthy. The study findings suggest there is room for adults to improve as less than 20 percent of Americans are living a flourishing life. (Keyes, 2002). Benefits from living a flourishing life emerge from research on the effects of experiencing a high ratio of positive to negative affect. The studied benefits of positive affect are increased responsiveness, "broadened behavioral repertoires", increased instinct, and increased perception and imagination. In addition, the good feelings associated with flourishing result in improvements to immune system functioning, cardiovascular recovery, lessened effects of negative affect, and frontal brain asymmetry.
Zirconium-based MOFs, including members of the UiO family, have been incorporated into polymeric coatings on SPME Arrow devices for the extraction of phenolic contaminants from food samples. For example, an amino-functionalized UiO-67 material was dispersed in polyacrylonitrile and deposited on a stainless-steel SPME Arrow by electrospinning. The coating was used with high-performance liquid chromatography and ultraviolet detection to determine bisphenol A, p-tert-butylphenol, 4-pentylphenol, nonylphenol, and hexestrol in milk and pork. The reported limits of detection were 0.003–0.01 μg L−1, and the coating retained stable extraction performance over 200 extraction–desorption cycles.
== Episode 3: The Wisdom of the Crowd == Willie Reyes is a 46 year old Army Veteran who is slowly losing his memories as a result of frequent seizures. Willie’s wife recounts the first time he had a seizure when he was 44 and he just fell to the floor one day without any explanation. Since the first seizure, he has developed multiple brain lesions, progressive memory loss, hearing loss, and violent/emotional mood swings. Willie says that because of his memory loss he forgets a lot of things and constantly repeats himself, making him feel like a child. His biggest fear is waking up one day and completely forgetting about his family. His daughter reveals that, recently, he's been starting to forget major memories from her childhood, such as her birth. Dr. Lisa Sanders took a look at Willie’s MRI scans and noted a huge lesion at the base of his brain with finger-like deterioration rooting up from it. She has a theory that the deterioration reaching the memory region of his brain could be the reason for his memory loss and mood swings. His wife states that in June 2019, he had a biopsy done with a piece of brain matter and the results came back as having unspecified inflammation. Dr. Sanders says that one of the biggest reasons that his condition is hard to diagnose is because it has very similar symptoms to a lot of common brain disorders, with no response to steroids. Dr. Lisa Sanders took out to publish Willie’s story and awaited the response with a possible diagnosis. Dr.
Sources: en.wikipedia.org
According to Rebecca Rocchi et al., 2024, creating natto by using Bacillus subtilis to ferment boiled red lentils, chickpeas, or green peas produced greater amounts of MK-7 than creating natto by using Bacillus subtilis to ferment boiled soybeans, lupins, or brown beans. Food frequency questionnaire-derived estimates of relative intakes of vitamins K in one northern European country suggest that for that population, about 90% of total vitamin K intakes are provided by K1, about 7.5% by MK-5 through MK-9 and about 2.5% by MK-4
However, the Western Allies (the US, UK, and France) never formally acknowledged the authority of the East German government to govern East Berlin; the official Allied protocol recognised only the authority of the Soviet Union in East Berlin in accordance with the occupation status of Berlin as a whole.
=== General protein characteristics === The EPCIP protein in humans has a sequence that is 219 amino acids in length. The primary sequence of EPCIP in humans has a molecular weight of 24.9 kDa and an isoelectric point of 8. When it's cleavable signal peptide, which spans amino acids 1-19, is removed, it has a molecular weight of 22.8 kDa and an isoelectric point of 7.8.
== Function == This gene encodes MC3R, a G-protein coupled receptor (GPCR) for melanocyte-stimulating hormone (MSH) and adrenocorticotropic hormone (ACTH) that is expressed in the brain. Early research suggests that humans who carry loss-of-function mutations in MC3R may have a somewhat later onset of puberty (roughly 5 months later for heterozygous girls). This along with evidence from animal models has led some researchers to propose that MC3R may have a role in regulating the timing of sexual maturity.
=== Mutation === IDH1 mutations are heterozygous, typically involving an amino acid substitution in the active site of the enzyme in codon 132. These mutations are somatic, meaning they primarily occur in cells that can become cancerous, such as those in brain and bone tumors. The mutation results in a loss of normal enzymatic function and the abnormal production of 2-hydroxyglutarate (2-HG). It has been considered to take place due to a change in the binding site of the enzyme. 2-HG has been found to inhibit enzymatic function of many alpha-ketoglutarate dependent dioxygenases, including histone and DNA demethylases, causing widespread changes in histone and DNA methylation and potentially promoting tumorigenesis.
Sources: en.wikipedia.org
It is a tripeptide of glutamate, cysteine, and glycine. The glutamate-cysteine bond is unusual because it forms through the gamma-carboxyl group.
It reflects the balance between oxidant exposure and antioxidant capacity. The ratio is not a direct clinical diagnosis and depends on the tissue and sample method.
No. It also participates in detoxification, amino acid transport, and protein modification. Its roles vary by cell type and compartment.
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.