GSH is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Last reviewed on 2026-05-17. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
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.
| 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 |
=== Canonical consensus motif === CK1δ preferably interacts with phospho-primed or acidic substrates due to the localization of positively charged amino acids (e.g. Arg-178 and Lys-224) in the region involved in substrate recognition. The canonical consensus motif targeted by CK1 is represented by the sequence pSer/pThr-X-X-(X)-Ser/Thr. In this motif X stands for any amino acid while pSer/pThr indicates a previously phosphorylated serine or threonine residue. CK1-mediated phosphorylation occurs at the Ser/Thr downstream of the phospho-primed residue. However, instead of a primed residue also a cluster of negatively charged amino acid residues (Asp or Glu) can be included in the canonical consensus motif.
=== Guest stars === Adam J. Yeend as Danny Mendoza Dearbhla Molloy as Queen Isabel Adam Fergus as Prince Richard Hilty Bowen as Princess Emily Josh Brener as Gavin Price Julie Claire as Francesca Hunter William Russ as Frank Holland Denise Crosby as Janet Holland Brian White as Franklin Russell Jon Tenney as Andrew Nichols
=== Fifth Republic === December 23, 1958: Decree amending various criminal provisions to introduce a fifth class of police contraventions; notably punishes passive soliciting. December 30, 1958: The term "birth allowance" replaces "maternity allowance," and the conditions for both that and the single wage allowance are modified. February 4, 1959: Ordinance on the general status of civil servants, which includes the principle of non-discrimination based on sex, except in certain exceptional cases, notably in the national police. April 9, 1960: Decree concerning the family record book. November 25, 1960: Ordinance on the fight against pimping. November 25, 1960: By decree, passive soliciting becomes a 3rd-class offense, active soliciting a 5th-class offense. December 2, 1960: France ratifies the United Nations Convention for the Suppression of the Traffic in Persons and of the Exploitation of the Prostitution of Others; the sanitary and social registry of prostitutes — created by law on April 24, 1946, and listing about 30,000 people in 1960 — is abolished. July 13, 1965: Law reforming matrimonial regimes: modification of the legal regime for marriages without a contract: the wife is free to manage her own property and pursue professional activity, no longer needing her husband's consent. September 29, 1965: Order establishing a study and liaison committee on women's labor issues. July 11, 1966: Law reforming adoption. December 30, 1966: Law on job protection in cases of maternity.
Sources: en.wikipedia.org
In 1881, Italian physicist Luigi Palmieri detected helium on Earth for the first time through its D3 spectral line, when he analyzed a material that had been sublimated during a recent eruption of Mount Vesuvius.
Systemic Lupus Erythematosus (SLE) Systemic Sclerosis (SS) Primary Sjögren's Syndrome (pSS) Raynaud's phenomenon Scleroderma Rheumatoid Arthritis The addition of anti-U1 RNP antibodies reveals that many autoimmune diseases share symptoms such as joint pain, fatigue, and Raynaud's phenomenon. The pathogenic role of anti-nRNP antibodies in these diseases varies, and their presence may only reflect immune system deregulation rather than being the direct cause of disease symptoms. Yet, they have served as valuable biomarkers.
The risk of having a myocardial infarction increases with older age, low physical activity, and low socioeconomic status. Heart attacks appear to occur more commonly in the morning hours, especially between 6 am and noon. Evidence suggests that heart attacks are at least three times more likely to occur in the morning than in the late evening. Shift work is also associated with a higher risk of MI. One analysis has found an increase in heart attacks immediately following the start of daylight saving time. Women who use combined oral contraceptive pills have a modestly increased risk of myocardial infarction, especially in the presence of other risk factors. The use of non-steroidal anti-inflammatory drugs (NSAIDs), even for as short as a week, increases risk. Endometriosis in women under the age of 40 is an identified risk factor. Patients with intravenous devices (such as a PICC line, Central Venous Catheter, and ECMO, among others) have an increased risk of DVT and thrombosis, therefore increasing the risk of a myocardial infarction and other problems caused by blood clots such as strokes. Air pollution is also an important modifiable risk. Short-term exposure to air pollution such as carbon monoxide, nitrogen dioxide, and sulfur dioxide (but not ozone) has been associated with MI and other acute cardiovascular events. For sudden cardiac deaths, every increment of 30 units in Pollutant Standards Index correlated with an 8% increased risk of out-of-hospital cardiac arrest on the day of exposure. Extremes of temperature are also associated.
Sources: en.wikipedia.org
The highest prevalence of illegal methamphetamine use occurs in parts of Asia and Oceania, and in the United States, where racemic methamphetamine and dextromethamphetamine are classified as Schedule II controlled substances. Levomethamphetamine is available as an over-the-counter (OTC) drug for use as an inhaled nasal decongestant in the United States and is seldom abused. Internationally, the production, distribution, sale, and possession of methamphetamine is restricted or banned in many countries, owing to its placement in schedule II of the United Nations Convention on Psychotropic Substances treaty. While dextromethamphetamine is a more potent drug, racemic methamphetamine is illicitly produced more often, owing to the relative ease of synthesis and regulatory limits of chemical precursor availability. The effects of methamphetamine are nearly identical to other substituted amphetamines. In low to moderate and therapeutic doses (5–25 mg orally), methamphetamine produces typical SNDRA effects and may elevate mood, increase alertness, concentration, and energy, reduce appetite, and promote weight loss. In overdose or during extended binges, it may induce psychosis, breakdown of skeletal muscle, seizures, and bleeding in the brain. Chronic high-dose use can precipitate unpredictable and rapid mood swings, stimulant psychosis (e.g., paranoia, hallucinations, delirium, and delusions), and aggression.
=== Skeleton === Because feathers are often associated with birds, feathered dinosaurs are often touted as the missing link between birds and dinosaurs. However, the multiple skeletal features also shared by the two groups represent another important line of evidence for paleontologists. Areas of the skeleton with important similarities include the neck, pubis, wrist (semi-lunate carpal), arm and pectoral girdle, furcula (wishbone), and breast bone. Comparison of bird and dinosaur skeletons through cladistic analysis strengthens the case for the link.
Tertomotide (GV1001, EARPALLTSRLRFIPK) is a 16-amino acid peptide based on the 616‑626 position fragment of human telomerase reverse transcriptase protein (hTERT). It was originally developed as a possible subunit vaccine for various types of cancer, as it can trigger immune attack against cancer cells which overexpress telomerase, a common mutation found in malignant tumors. However, it does not block telomerase activity in healthy tissue and has been found to produce various useful activities in its own right including antiviral, antiinflammatory and antidepressant effects, and has been trialled for numerous other medical applications including Alzheimer's disease as well as its original role in the treatment of cancer.
Recent single-molecule tracking experiments in live E. coli showed an ongoing but slower protein synthesis upon treatment with different aminoglycoside drugs. (Spectinomycin, a related but distinct chemical structure class often discussed with aminoglycosides, does not induce mRNA misreading and is generally not bactericidal.)
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.