The short version of GSH fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2025-09-17. Anything still debated is marked as such rather than presented as settled.
Glutathione is a small tripeptide composed of glutamate, cysteine, and glycine, with the unusual gamma-glutamyl linkage between glutamate and cysteine. Its cysteine thiol group makes it a major non-enzymatic antioxidant in cells. The reduced form, GSH, predominates in most intracellular compartments, while the oxidized disulfide form, GSSG, is produced when GSH reduces reactive oxygen species. Intracellular concentrations often reach millimolar levels, whereas plasma concentrations are much lower, typically in the low micromolar range. This gradient reflects active synthesis, transport, and consumption rather than passive distribution.
Synthesis occurs in two ATP-dependent steps: glutamate-cysteine ligase joins glutamate and cysteine to form gamma-glutamylcysteine, and glutathione synthetase adds glycine to complete the tripeptide. The pathway is feedback-inhibited by GSH and limited by cysteine availability, so cysteine supply often constrains production. Once formed, GSH participates in redox buffering, xenobiotic conjugation, and protein glutathionylation. Glutathione peroxidase uses GSH to reduce hydrogen peroxide and lipid peroxides, yielding GSSG, while glutathione reductase regenerates GSH using NADPH. Glutathione S-transferases conjugate electrophiles to GSH, supporting detoxification and excretion.
Because GSH is central to redox balance, its status is studied in aging, liver disease, neurodegenerative conditions, and metabolic disorders. Observational studies often report lower GSH or higher GSSG in affected tissues, but such associations do not establish that raising glutathione changes disease outcomes. Oral glutathione is digested into amino acids, and whether intact absorption occurs remains debated; precursors such as N-acetylcysteine and cysteine donors are also investigated. Regulatory agencies generally treat glutathione as a dietary supplement, not an approved drug, and clinical claims require evidence from controlled trials.
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 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.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C10H17N3O6S | Tripeptide of glutamate, cysteine, and glycine. |
| Molar mass | 307.32 g/mol | Calculated from the molecular formula. |
| Appearance | White to off-white powder | Typically crystalline or lyophilized solid. |
| Solubility | Soluble in water; insoluble in ethanol | Aqueous solutions are acidic and prone to oxidation. |
| Typical storage | -20 °C, desiccated, protect from light | Reduce exposure to oxygen and moisture. |
Dipeptidase 2 (DPEP2) is a protein which in humans is encoded by the DPEP2 gene. DPEP2 belongs to the membrane-bound dipeptidase (EC 3.4.13.19) family. These enzymes hydrolyze a variety of dipeptides, including leukotriene D4, the beta-lactam ring of some antibiotics, and cystinyl-bis-glycine (cys-bis-gly) formed during glutathione degradation.
Since tritium undergoes radioactive decay, and is also difficult to confine physically, the much larger secondary charge of heavy hydrogen isotopes needed in a true hydrogen bomb uses solid lithium deuteride as its source of deuterium and tritium, producing the tritium in situ during secondary ignition. During the detonation of the primary fission bomb stage in a thermonuclear weapon (Teller–Ulam staging), the sparkplug, a cylinder of 235U/239Pu at the center of the fusion stage(s), begins to fission in a chain reaction, from excess neutrons channeled from the primary. The neutrons released from the fission of the sparkplug split lithium-6 into tritium and helium-4, while lithium-7 is split into helium-4, tritium, and one neutron. As these reactions occur, the fusion stage is compressed by photons from the primary and fission of the 238U or 238U/235U jacket surrounding the fusion stage. Therefore, the fusion stage breeds its own tritium as the device detonates. In the extreme heat and pressure of the explosion, some of the tritium is then forced into fusion with deuterium, and that reaction releases even more neutrons. Since this fusion process requires an extremely high temperature for ignition, and it produces fewer and less energetic neutrons (only fission and fusion are net neutron producers), lithium deuteride is not used in boosted bombs, but rather for multi-stage hydrogen bombs.
==== Indirect routes of production of 99Mo ==== Other particle accelerator-based isotope production techniques have been investigated. The supply disruptions of 99Mo in the late 2000s and the ageing of the producing nuclear reactors forced the industry to look into alternative methods of production. The use of cyclotrons or electron accelerators to produce 99Mo from 100Mo via (p,pn) or (γ,n) reactions, respectively, has been further investigated. The (n,2n) reaction on 100Mo yields a higher reaction cross-section for high energy neutrons than of (n,γ) on 98Mo with thermal neutrons. In particular, this method requires accelerators that generate fast neutron spectrums, such as ones using D-T or other fusion-based reactions, or high energy spallation or knock out reactions. A disadvantage of these techniques is the necessity for enriched 100Mo targets, which are significantly more expensive than natural isotopic targets and typically require recycling of the material, which can be costly, time-consuming, and arduous.
== Discography == Studio albums (A Lament for...) The Addicts (2007) Leaving Paris (2010) Hope /// Dope /// Rope (2012) This Is Not Supposed To Be Positive (2015) Banlieue Triste (2018) A Loner (2022) Saddiction (2025) EPs Bus de Nuit (2019) Split albums Hangman's Chair / Eibon (2007) Hangman's Chair / Drawers (2012) Hangman's Chair / Acid Deathtrip (2014) Hangman's Chair / Greenmachine (2017)
Sources: en.wikipedia.org
== Locations == In addition to the main hospital in Raleigh, Rex Health Care has locations throughout Wake County. These include an outpatient rehabilitation and fitness center in Garner, outpatient facilities in Cary, Holly Springs (Holly Springs facility), and Wake Forest (Wakefield facility), and outpatient diagnostics in Cary, Wakefield, and Knightdale. Apex also has a rehabilitation and nursing care center that is run by Rex. In December 2021, Rex opened a new facility in Holly Springs offering multiple services.
== References == Catalog of Copyright Entries: Third Series Volume 24, Parts 12-13, Number 1: Motion Pictures and Filmstrips 1970 Library of Congress [966] Catalog of Copyright Entries: Third Series Volume 25, Parts 12–13, Number 1: Motion Pictures and Filmstrips 1971 Library of Congress [967] Catalog of Copyright Entries: Third Series Volume 27, Parts 12–13, Number 1: Motion Pictures 1973 Library of Congress [968] Catalog of Copyright Entries: Third Series Volume 28, Parts 12–13, Number 1: Motion Pictures 1974 Library of Congress [969] Catalog of Copyright Entries: Third Series Volume 29, Parts 12–13, Number 1: Motion Pictures 1975 Library of Congress [970] Catalog of Copyright Entries: Third Series Volume 30, Parts 12–13, Number 1: Motion Pictures 1976 Library of Congress [971] Catalog of Copyright Entries: Third Series Volume 31, Parts 12–13, Number 1: Motion Pictures 1977 Library of Congress [972] Catalog of Copyright Entries: Fourth Series Volume 31, Part 4: Motion Pictures & Filmstrips 1980 Library of Congress [973] Educational Film Guide 1947 H. W. Wilson Company [974] Educational Film Guide 1959 Annual Supplement 1959 H. W. Wilson Company [975] Motion Pictures 1912–1939 Catalog of Copyright Entries 1951 Library of Congress [976] Motion Pictures 1940–1949 Catalog of Copyright Entries 1953 Library of Congress [977] Motion Pictures 1950–1959 Catalog of Copyright Entries 1960 Library of Congress [978] Motion Pictures 1960–1969 Catalog of Copyright Entries 1971 Library of Congress [979]
Understanding of the molecular basis of binding to integrins has enabled the development of several drugs for cardiovascular disease and cancer, including eptifibatide, tirofiban and cilengitide. These drugs inhibit integrin binding. PET radiotracers such as fluciclatide utilize RGD-containing peptides to home to tumors, allowing for cancer monitoring. Eptifibatide and tirofiban are anti-clotting drugs indicated to prevent thrombosis in acute ischemic coronary syndromes. Eptifibatide is additionally FDA approved for patients undergoing percutaneous coronary intervention. These drugs block activation of the integrin responsible for aggregation of platelets (αIIbβ3, also known as glycoprotein IIb/IIIa) in response to the blood glycoproteins fibrinogen and von Willebrand factor. Eptifibatide (marketed as Integrilin) is a cyclic (circular) seven amino acid peptide, whereas tirofiban is a small molecule designed to mimic the chemistry and binding affinity of the RGD sequence.
The MCM6 gene, MCM6, is expressed at very high level. MCM6 contains 18 introns. There are 2 non overlapping alternative last exons. The transcripts appear to differ by truncation of the 3' end, presence or absence of 2 cassette exons, common exons with different boundaries. MCM6 produces, by alternative splicing, 3 different transcripts, all with introns, putatively encoding 3 different protein isoforms. MCM6 contains two of the regulatory regions for LCT, the gene encoding the protein lactase, located in two of the MCM6 introns, approximately 14 kb and 22 kb upstream of LCT. A substitution of thymine for cytosine in the first region (at -13910), in particular, has been shown to function in vitro as an enhancer element capable of differentially activating transcription of LCT promoter. Mutations in these regions are associated with lactose tolerance into adult life. MCM6 has been shown to interact with: Mini Chromosome Maintenance
China is the main supplier of wolfberry products globally, with 2023 production derived from a cultivation area of 325,000 mu – about 21,667 ha (53,540 acres) – creating a national wolfberry economy of 29 billion yuan (approximately US $4.2 billion). Some 61% of commercially produced wolfberries in China comes from L. barbarum plantations in the Ningxia region, mainly in Zhongning County. Goji cultivation also occurs in Gansu, Qinghai Province, and the Haixi Mongol and Tibetan Autonomous Prefecture. The main berry products for export are manufactured beverages, juice concentrate, dried berries, snacks, and freeze-dried juice powder and berries. Ningxia goji has been cultivated along the fertile floodplains of the Yellow River over centuries. The region has developed an industrial association of growers, processors, marketers, and scholars of wolfberry cultivation to promote the berry's commercial and export potential. Ningxia goji berries, the variety used by practitioners of traditional Chinese medicine, are celebrated annually with a festival.
Sources: en.wikipedia.org
GLD-2 is a common and abundant, but yet quite unknown protein that has already been found in each of the five kingdoms. In the animal kingdom, it has been specially detected in Homo sapiens, Drosophila, Xenopus and Mus musculus. However, there has also been noticed the presence of GLD-2 in Arabidopsis thaliana which belongs in the plants kingdom; Escherichia Coli in monera and Candida albicans in fungi. In human beings it is mostly expressed in the brain and within it, in the cerebellum, hippocampus and medulla. They can also be found in other source tissues such as the fibroblast, HeLa cell, MCF-7 cell, melanoma cell line and thymus. Inside those cells, it can be located in the nucleus and mitochondrion since its main function is related with DNA polyadenilation and these cell organelles are the only ones were DNA can be found. However, there are also GLD-2 in a soluble way in the cytosol; the reason for their presence is still unsure. In Escherichia Coli, this enzymatic protein can be found in the cell membrane and in the cytosol, whereas in Drosophila melanogaster, it predominates in the brain's nucleus and cytoplasm, oocyte, ovary and testis’ cells. Finally, in the Arabidopsis thaliana, it is located in the flower's nucleus, root, stem and leaf cells.
34. Adv Gerontol. 2006;19:72-8. [Effect of age, different light conditions, melatonin, and epitalon on lysosomal proteinase activity in the liver and kidneys of rats]. [Article in Russian] Rendakov NL, Tiutiunnik NN, Vinogradova IA. Ageing, melatonin, epithalon (tetrapeptide Ala-Glu-Asp-Gly) and different light conditions effects on protein content and cathepsins B and D activities in rat liver and kidneys lysosomal fractions were studied. Ageing leads to decrease of cathepsins activity in rat liver lysosomal fractions. Constant light and darkness conditions result in earlier age decline of cathepsins activity. Absence of day and night succession in comparison with alternating light conditions causes decline of both general and specific cathepsin D activity. Melatonin and epithalon administration resulted in decrease of cathepsin D activity in liver only under control interchangeable light conditions. Cathepsin B activity in liver and kidneys lysosomal fractions declined in all experimental light conditions. Cathepsins activity decrease under the influence of epiphysial factors is evidently connected with their inhibitory effect on protein and general metabolism.
In recent years, the clinical understanding of the FDA's "black box" warning has evolved to focus on the balance between medication risks and the risks of untreated depression. While the 2004 and 2006 warnings regarding increased suicidal ideation in children and young adults (under 25) remain, long-term data published through 2024 suggests that these warnings may have led to an unintended decline in depression treatment, which some studies correlate with an increase in suicide deaths among adolescents. Statistical meta-analyses updated in 2022 confirm that while the risk of suicidal thoughts in youth on antidepressants like fluoxetine is approximately twice that of a placebo (4% vs 2%), there remains no statistically significant increase in completed suicides across dozens of pediatric trials. Furthermore, recent data continues to show a protective effect in older populations; for adults aged 65 and older, antidepressant use is associated with a statistically significant decrease in suicidality. Regarding specific treatments, research published between 2021 and 2023 reinforces that fluoxetine is most effective and carries the lowest risk of adverse behavioral events when paired with psychotherapy. A 2022 meta-analysis found that combination therapy (medication plus CBT) resulted in a lower incidence of suicidal events compared to fluoxetine alone.
=== Functional and bioactive components === Among the functional proteins detected in donkey milk, there are molecules active in antimicrobial protection such as lysozyme and lactoferrin. The lactoferrin content of donkey milk is intermediate between the lower values of cow milk and the higher values of human milk. Lactoferrin inhibits the growth of iron-dependent bacteria in the gastrointestinal tract. This inhibits certain organisms, such as coliforms and yeast, that require iron. Lysozyme in donkey milk is present in large amounts, and ranges from 1.0 mg/mL to 4 mg/mL, depending on the analytical method used (chemical or microbiological); This substance is present also in humans (0.12 mg/mL) but only in trace amounts in cow and goat milk. Lysozyme in donkey milk is highly thermo-stable and is very resistant to acid and protease and may play a significant role in the intestinal immune response. In donkey mammary secretion, defatted or not, growth factors and hormones have also been determined. Donkey mammary secretions contain human-like leptin at levels close to human milk (3.35 e 5.32 ng/mL milk). The bioactive peptides insulin-like growth factor 1, ghrelin, and triiodothyronine were also found in frozen donkey milk. These molecules and many others present in human milk, are increasingly receiving attention from a nutraceutical point of view because of their potential direct role in regulating food intake, metabolism, and infant body condition.
Sources: en.wikipedia.org
GSH is the reduced, thiol-containing form of glutathione, while GSSG is the oxidized disulfide dimer formed when two GSH molecules react. Cells maintain a high GSH-to-GSSG ratio under normal conditions. A shift toward GSSG is often interpreted as oxidative stress, though sample handling can affect the measured ratio.
No. It is a tripeptide made from three amino acids: glutamate, cysteine, and glycine. The gamma-glutamyl bond is unusual and distinguishes it from typical peptide linkages.
Most ingested glutathione is broken down in the gastrointestinal tract into its constituent amino acids. Some formulations may protect it from digestion, but intact absorption and delivery to specific tissues remain uncertain. Research continues on precursors and delivery methods.
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.