The short version of epitalon fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-01-02. Anything still debated is marked as such rather than presented as settled.
Literature searches for this compound must account for several spelling variants. Indexing databases contain epitalon, epithalon, epithalone, and AEDG, and relevant records are scattered across Russian-language and English-language journals that do not consistently cross-cite. Early publications describe the parent extract as a mixture of many peptides, whereas later work addresses the single synthetic tetrapeptide. That shift in nomenclature complicates comparison between studies, because extract data and tetrapeptide data are sometimes cited interchangeably. A search strategy omitting the alternate spellings will return an incomplete set of references.
Reported biological findings come mainly from cell culture and rodent experiments. Those studies describe changes in telomerase catalytic subunit expression, melatonin rhythm amplitude, and antioxidant enzyme activity after peptide exposure. Human data are sparse and consist of small trials with limited blinding and inconsistent endpoints. The proposed mechanisms remain hypotheses rather than established facts, and there is no consensus on whether effects observed in animals carry over to people. Independent replication outside the original research groups is limited, which is a recognised gap in the published literature.
Proposed mechanisms centre on cell-culture observations rather than a defined receptor interaction. Several reports describe increased expression of the telomerase catalytic subunit after exposure of cultured human cells, and the authors attributed the effect to short peptide fragments entering the nucleus and influencing gene transcription. No receptor for the tetrapeptide has been identified, and the free peptide is expected to be degraded rapidly by plasma peptidases. Whether any measurable fraction reaches intact tissues after administration remains an unresolved question rather than an established finding.
The published literature is dominated by a small number of research groups, much of it in Russian-language journals, and independent replication outside those groups is limited. Studies are typically small, use cultured cells or rodent models, and report endpoints that differ between papers, which makes comparison difficult. Large randomised human trials have not appeared in the indexed literature. Questions about absorption, distribution and clearance are therefore still treated as open in reviews that mention the compound.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic tetrapeptide | Four amino acid residues |
| Residue sequence | Ala-Glu-Asp-Gly | Abbreviated AEDG |
| Approximate mass | 390.35 Da | Monoisotopic, free base form |
| Parent preparation | Epithalamin extract | Derived from pineal tissue |
| Common spelling variants | Epithalon, epithalone, AEDG | Affects literature retrieval |
==== Thiopeptides ==== Thiopeptide biosynthesis involves particularly extensive modification of the core peptide scaffold. Indeed, due to the highly complex structures of thiopeptides, it was commonly thought that these natural products were nonribosomal peptides. Recognition of the ribosomal origin of these molecules came in 2009 with the independent discovery of the gene clusters for several thiopeptides. The standard nomenclature for thiopeptide biosynthetic proteins follows that of the thiomuracin gene cluster. In addition to the precursor peptide, referred to as the A peptide, thiopeptide biosynthesis requires at least six genes. These include lanthipeptide-like dehydratases, designated the B and C proteins, which install dehydroalanine and dehydrobutyrine moieties by dehydrating Ser/Thr precursor residues. Azole and azoline synthesis is effected by the E protein, the dehydrogenase, and the G protein, the cyclodehydratase. The nitrogen-containing heterocycle is installed by the D protein cyclase via a putative [4+2] cycloaddition of dehydroalanine moieties to form the characteristic macrocycle. The F protein is responsible for binding of the leader peptide. Thiopeptide biosynthesis is biochemically similar to that of cyanobactins, lanthipeptides, and linear azol(in)e-containing peptides (LAPs). As with cyanobactins and LAPs, azole and azoline synthesis occurs via the action of an ATP-dependent YcaO-domain cyclodehydratase.
Diazepam appears to act on areas of the limbic system, thalamus, and hypothalamus, inducing anxiolytic effects. Benzodiazepine drugs, including diazepam, increase the inhibitory processes in the cerebral cortex. The anticonvulsant properties of diazepam and other benzodiazepines may be in part or entirely due to binding to voltage-dependent sodium channels rather than GABAA receptors. Sustained repetitive firing seems limited by benzodiazepines' effect of slowing recovery of sodium channels from inactivation. The muscle relaxant properties of diazepam are produced via inhibition of polysynaptic pathways in the spinal cord.
Peukert argued that despite a turn towards Social Darwinism when confronted with the failure of the welfare state to solve all social problems in the 1920s, that it was the democratic Weimar constitution that had provided a thin legal wedge that prevented the full implications of this from being worked out. Peukert argued that in 1939 that the entire system that had been built up for scientifically identifying those of racial "non-value" served as the apparatus for genocide. Peukert wrote that all of the criteria for identifying Jews and Romany as peoples of racial "non-value" were based on the pseudo-scientific theories that had been promoted by generations of "race scientists" and that those serving in the "human sciences and social professions" worked to provide the theories for an "all-embracing racist restructuring of social policy, educational policy and health and welfare policy". The culmination of these efforts was the proposed 1944 "Law for the Treatment of Community Aliens" which called for sending to the concentration camps anyone who failed to live be up to be a proper 'volksgenossen as a gemeinschaftsfremde (community alien). Only the fact that Germany was fully engaged in World War II prevented Hitler from signing "Law for the Treatment of Community Aliens", which was put off until the Reich won the "final victory". Peukert wrote: "Nazi racism, the professed goal which had been to secure the immortality of the racially pure volkskörper in practice inevitably became converted into a crusade against life".
The Singapore Tourism Board (STB) is the statutory board under the Ministry of Trade and Industry which is tasked with the promotion of the country's tourism industry. In August 2017 the STB and the Economic Development Board (EDB) unveiled a unified brand, Singapore – Passion Made Possible, to market Singapore internationally for tourism and business purposes. The Orchard Road district, which contains multi-storey shopping centres and hotels, can be considered the centre of shopping and tourism in Singapore. Other popular tourist attractions include the Singapore Zoo, River Wonders, Bird Paradise and Night Safari (located in Northern Singapore). The Singapore Zoo has embraced the open zoo concept whereby animals are kept in enclosures, separated from visitors by hidden dry or wet moats, instead of caging the animals, and the River Wonders has 300 species of animals, including numerous endangered species. Singapore promotes itself as a medical tourism hub, with about 200,000 foreigners seeking medical care there each year. Singapore medical services aim to serve at least one million foreign patients annually and generate US$3 billion in revenue. In 2025, Singapore saw a record number of nearly 245 million people crossing its borders. In the same year, Singapore turned away more than 45,000 foreigners – 38% higher than 2024. Luxury Hotels in Singapore include Raffles Hotel, Marina Bay Sands, Grand Hyatt Singapore, Capella Singapore, Conrad Singapore, Hilton Singapore Orchard, Shangri-La Singapore and The Ritz-Carlton Millenia Singapore.
Sources: en.wikipedia.org
=== Pharmacokinetics === A 2007 human pharmacokinetic study of sodium RLA demonstrated the maximum concentration in plasma and bioavailability are significantly greater than the free acid form, and rivals plasma levels achieved by intravenous administration of the free acid form. Additionally, high plasma levels comparable to those in animal models where Nrf2 was activated were achieved. The various forms of LA are not bioequivalent. Very few studies compare individual enantiomers with racemic lipoic acid. It is unclear if twice as much racemic lipoic acid can replace RLA. The toxic dose of LA in cats is much lower than that in humans or dogs and produces hepatocellular toxicity.
Glutamate is a key compound in cellular metabolism. Dietary proteins are digested into amino acids, which can be absorbed into the bloodstream or serve as metabolic fuel within the intestinal lining cells (enterocytes). A key process in amino acid degradation is transamination, in which the amino group of an amino acid is transferred to an α-ketoacid, typically catalysed by a transaminase. The reaction can be generalised as such:
== Election to Kerala Legislative Assembly == Anoop's father, who was the Minister for Food and Civil Supplies, died on 30 October 2011. Following this, Anoop was nominated by the Kerala Congress (Jacob) and UDF to contest from the Piravom assembly seat previously represented by his father. His father had lost the sitting seat in 2006 elections and recaptured it in 2011 election by a margin of 157 votes. Against Anoop Jacob, CPI(M)–led LDF once again fielded M. J. Jacob, who had won against T. M. Jacob in 2006 and lost in 2011. Since the result of Piravom by-election mattered heavily to the ruling UDF who had a slender margin of 1 seat in the Legislative assembly over LDF, the constituency witnessed intense campaigning from both sides. Election was held on 17 March 2012 and results were announced on 21 March 2012. Anoop Jacob won the by-election by a significant margin of 12,071 votes. He was sworn in as an MLA on 22 March 2012. Anoop took oath as the Minister for Food & Civil Supplies on 12 April 2012 and occupied office in the North Block of the Kerala Secretariat; both portfolio & office last held by his departed father.
=== Biosimilar drugs === Biosimilar drugs are biological products that are highly similar to an already approved biologic drug, with few or no clinically meaningful differences in terms of safety, purity, and potency. These drugs are developed to be equivalent to the reference biologic, often at a lower cost, providing alternative treatment options. In the context of ankylosing spondylitis, biosimilars are typically used as alternatives to the original biologic drugs. Biosimilars for ankylosing spondylitis may include versions of tumor necrosis factor inhibitors or other biologics commonly used in the treatment of the condition. When possible, physicians are recommended to use the original drugs over the biosimilar versions. Even biosimilars with perfect replication of the quality, composition, and other properties of the original drug are susceptible to nocebo effects.
For most people, 3.5 dried grams (1/8 oz) would be considered a high dose and may produce an intense experience; this is, however, typically considered a standard dose among recreational users. Body composition (usually weight) should be taken into account when calculating dosage. For many individuals, doses above three grams may be overwhelming. For a few rare people, doses as small as 0.25 gram can produce full-blown effects normally associated with very high doses. For most people, however, that dose level would have virtually no effects. There are many different ways to ingest Psilocybe cubensis. Users may prefer to take them raw, freshly harvested, or dried and preserved. It is also possible to prepare culinary dishes such as pasta or tea with the mushrooms. However, the psychoactive compounds begin to break down rapidly at temperatures exceeding 100 °C (212 °F). Another method of ingestion known as "Lemon Tekking" involves combining pulverized Psilocybe cubensis with a concentrated citrus juice with a pH of ~2. Many users believe that a considerable amount of the psilocybin will have been dephosphorylated into psilocin, the psychoactive metabolite, by citric acid. However, this claim is not substantiated by the literature on the metabolism of psilocybin, as dephosphorylation is known to be mediated by the enzyme alkaline phosphatase in humans. It is therefore more likely that citric acid mostly helps in breakdown of mushroom cells, aiding in digestion and psilocybin release.
Sources: en.wikipedia.org
It is based on epithalamin, a peptide-rich preparation obtained from pineal gland tissue and studied in the former Soviet Union. Researchers later identified the tetrapeptide AEDG as a constituent fragment of that material. Modern supplies are produced by chemical synthesis rather than tissue extraction.
No. Epithalamin is a heterogeneous extract containing many peptides, while epitalon is a single synthesised tetrapeptide. Publications sometimes treat findings from the two as equivalent, which is a common source of confusion. Their compositions differ and they are not interchangeable in analytical terms.
Most published work uses cell cultures or rodents because those models are faster and less costly to run. The few human trials that have been reported are small, and several lack control groups or blinding. This restricts what can reasonably be concluded about effects in people.
No. Epithalamin is a heterogeneous peptide fraction obtained from pineal gland extract and contains many components. Epitalon is a single synthetic tetrapeptide with the sequence Ala-Glu-Asp-Gly. Researchers synthesised the shorter peptide while attempting to identify active sequences within the extract.