Epitalon comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Last reviewed on 2026-07-19. Where a claim depends on a specific study, the study is described rather than over-claimed.
Epitalon is a synthetic tetrapeptide with the sequence alanine-glutamate-aspartate-glycine, commonly abbreviated AEDG. It was designed at the St. Petersburg Institute of Bioregulation and Gerontology as a short, chemically defined analogue of epithalamin, a fraction obtained from bovine pineal tissue. Small peptide bioregulators of this type formed a long-running line of work there from the 1980s onward. Because the molecule is produced by solid-phase synthesis rather than extraction, its composition is exact and its purity can be measured directly.
The most frequently cited proposed action is induction of telomerase, the enzyme that adds repeat sequences to chromosome ends. Cell-culture work from the originating group reported higher telomerase reverse transcriptase expression and measurable telomere elongation in human somatic cells after exposure. How a four-residue peptide would reach nuclear gene regulation is not established, and no cell-surface receptor or uptake route has been identified. Additional reports describe changes in melatonin secretion, antioxidant enzyme activity and lipid peroxidation in aged animals, but these findings remain mechanistically unconnected to the telomerase observation.
Published evidence comes mainly from Russian-language journals and from a single research group, with small sample sizes and limited independent replication. A few laboratories outside that group have examined related peptides and reported weaker or absent telomerase effects, so the central claim is best described as contested rather than settled. Rodent studies report modest changes in some ageing markers and in survival, but designs vary and control conditions are often sparse. No large randomised trial in humans has been published, and long-term safety data in healthy populations are correspondingly thin.
Epitalon is a synthetic tetrapeptide with the amino acid sequence alanine-glutamate-aspartate-glycine, abbreviated Ala-Glu-Asp-Gly or AEDG. It was developed by the Russian researcher Vladimir Khavinson and colleagues during work on peptide bioregulators derived from the pineal gland. The compound is short enough to be produced by standard solid-phase peptide synthesis and is typically handled as a lyophilized white powder. Its small size distinguishes it from larger pineal peptides such as epithalamin, a complex extract from which the tetrapeptide was conceptually derived.
The four residues give epitalon a molecular formula of C14H22N4O9 and a molecular weight near 390.35 daltons. The presence of two acidic residues, glutamate and aspartate, makes the free peptide strongly acidic, while the alanine and glycine ends provide neutral, nonpolar character. This combination produces a molecule with substantial water solubility. Because there are no cysteine, methionine, or tryptophan residues, the peptide lacks the most common oxidation-sensitive side chains, which simplifies handling compared with many longer peptides.
The proposed relationship between epitalon and pineal function is a central part of its background. Khavinson's group reported that short peptides corresponding to regions of larger pineal proteins could influence gene expression in cells. Epitalon was framed as a synthetic analogue of an active fragment rather than a direct isolation product. Whether the tetrapeptide reproduces the effects of the parent extract is an open question, because comparative studies are limited and the parent extract itself is not a single defined substance.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C14H22N4O9 | Calculated from the four residues with three water losses |
| Molecular mass | About 390.35 g/mol | Monoisotopic mass near 390.14, used for mass-spectrometric identification |
| Peptide sequence | Ala-Glu-Asp-Gly | Single-letter form AEDG; no disulfide bonds or modified residues |
| Appearance | White to off-white solid | Supplied as a dried powder |
| Isoelectric point | Around 4 | Estimated from aspartate and glutamate side-chain pKa values |
In its supplied form epitalon is a white to off-white powder, usually lyophilized and often hygroscopic. It dissolves readily in water and in aqueous buffers, and it is commonly handled as the acetate or trifluoroacetate salt to improve stability during purification and drying. The amide backbone is labile in aqueous media, so solutions are less durable than the dry solid. Handling notes in the chemical literature therefore emphasize keeping the powder dry, cool and shielded from light until it is dissolved.
Epitalon is a synthetic tetrapeptide whose sequence is alanine-glutamate-aspartate-glycine, written in single-letter code as AEDG. The four residues are joined by three peptide bonds, giving a linear backbone with no branching and no disulfide bridges. Its calculated molecular mass for the free form is approximately 390.3 daltons, a figure that rises when the compound is supplied as an acetate or trifluoroacetate salt. Because the chain is short, the molecule is defined entirely by its residue order rather than by any folded three-dimensional structure.
The compound is described in the literature as a derivative of epithalamin, a preparation obtained from bovine pineal tissue. Work on this peptide family was carried out mainly by a research group in Saint Petersburg beginning in the 1980s, and the substance was later registered for clinical use in Russia under the name Epitalon. Outside that region it is generally treated as a research chemical rather than an approved medicine. Statements about its biological activity rest on a relatively small number of studies, and independent replication remains limited.
The compound is generally presented as a synthetic fragment of epithalamin, a pineal gland extract investigated in the former Soviet Union from the 1970s onward. Vladimir Khavinson and colleagues in Saint Petersburg developed short peptides modelled on such extracts, and epitalon became the most widely cited of those sequences. Most primary reports appeared in Russian-language journals or in proceedings with limited international circulation. Independent replication in laboratories outside that network remains sparse, and much repeated secondary material traces back to a small number of originating groups.
Laboratory work has examined effects on telomerase activity in cultured cells, on melatonin rhythms in animals, and on markers of oxidative stress. Some experiments report measurable changes while others show none, and the reported findings rest largely on small studies. The absence of large independent trials means the generality of these results is unresolved rather than settled. Review articles occasionally apply the label geroprotector, a term that reflects a research hypothesis about ageing rather than an established clinical finding.
Carlos Gustavo Maslatón (born 19 December 1958) is an Argentine lawyer, financial analyst, trader, bitcoin advocate, influencer, and former politician. Originally active in student politics, he was elected to the Buenos Aires City Council in 1987 as part of the Union of the Democratic Centre (UCEDE). Since 2021, he has been part of La Libertad Avanza. He briefly intended to run for president in the 2023 elections.
=== Background === In October 2008, Konstantin Kosachev, chair of the Russian State Duma Foreign Affairs Committee, said he supported the international investigation, but "a lot depends on who will enter this commission". In November 2008, Georgia called on the European Union to conduct an independent inquiry who was to blame for the conflict. An independent, international fact-finding mission headed by Swiss diplomat Heidi Tagliavini was established by the EU to determine the causes of the war. The commission relied on "recognised" experts. The commission was funded with €1.6 million. The report was published on 30 September 2009. According to the European Council on Foreign Relations, Russian information operations influenced the EU report. The report said it could not claim "veracity or completeness in an absolute sense", since "It incorporates what has been available to the Mission at the time of writing." The report could not give "total assurance that there are no mistakes or omissions".
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inhibit secretion of many hormones, such as gastrin, cholecystokinin, glucagon, growth hormone, insulin, secretin, pancreatic polypeptide, TSH, and vasoactive intestinal peptide, reduce secretion of fluids by the intestine and pancreas, reduce gastrointestinal motility and inhibit contraction of the gallbladder, inhibit the action of certain hormones from the anterior pituitary, cause vasoconstriction in the blood vessels, and reduce portal vessel pressures in bleeding varices. It has also been shown to produce analgesic effects, most probably acting as a partial agonist at the mu opioid receptor.
Sources: en.wikipedia.org
=== Hot air drying in drying chamber === Compact flowers like marigolds, chrysanthemums, cornflowers and zinnias dry well in a fan-assisted, convection chamber. Non-ventilated chambers are not appropriate, because they generate too much moisture. The material must be dried at a low temperature (30-35˚Celsius), over many hours. The flowers are slotted through holes in a wire mesh rack leaving room for the stems to dangle below. The time required depends upon the density of the flowers.
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Skittles are commonly used to effectively treat hypoglycemia in diabetics. In July 2022, a lawsuit seeking class-action status was filed in California regarding the continued use of titanium dioxide as a coloring agent. The lawsuit was voluntarily dismissed without prejudice in November 2022. In March 2023, Democratic California Assemblyman Jesse Gabriel introduced Bill 418 to the California Assembly that would ban production, sales, and consumption of all foods and drinks (for example Skittles, Pez, Sour Patch Kids, Campbell Soup, etc.) that contain titanium dioxide and four other harmful additives, propylparaben, red dye 3, brominated vegetable oil, and potassium bromate, across the state of California, all five of which have been linked to causing cancer and other health problems. At least three of these additives are banned by the European Union from use in food. Titanium dioxide was removed from the list before the bill was voted on. The bill passed, making California the first US state to adopt the European Union's ban on these cancer-causing chemical additives from being used in food and drink products.
==== Integration of Chinese and Western medicine (1368–1949) ==== During the Ming (1368–1644) and Qing (1644–1912) dynasties, medical discoveries slowed but practitioners achieved significant knowledge integration across cultures. Over one hundred comprehensive medical monographs were cultivated, many synthesizing developments in the study of wasting-thirst and of diabetes. Zhang Xichun (1860–1933), a renowned integrator of medical knowledge, produced (among other works) Yīxué zhōng zhōng cānxī lù (医学衷中参西录; "The Integration of Traditional Chinese and Western Medicine"). In a dedicated chapter named "Xiāo-kě therapies", he discussed the following aspects synthesizing wasting-thirst and diabetes: nomenclature, theories (pathologies), primary formulae, medications (herbology and pharmacology), nursing (diet and maintenance), medical cases, and integrated analysis (protein and essence; qi and fluids). Yu Yunxiu (1879–1954), a Japanese-educated practitioner of Western medicine aligned with the modernizer camp of the Chinese Ministry of Health, attempted to forbid the practice of Chinese medicine in 1929. In 1939, he wrote on the rough equivalence of wasting-thirst and diabetes.
This is a list of topics related to HIV/AIDS, a spectrum of conditions caused by human immunodeficiency virus (HIV) infection. Many of the topics listed here were originally taken from the public domain U.S. Department of Health Glossary of HIV/AIDS-Related Terms, 4th Edition.
Sources: en.wikipedia.org
No. Epithalamin is a peptide-containing extract of bovine pineal glands, while epitalon is a single synthetic tetrapeptide. The extract contains many peptides and other tissue components, so its composition varies between batches in ways that a synthesised sequence does not.
It is not recognised as an endogenous peptide hormone. The four-residue sequence can appear inside larger proteins and in digestive fragments of dietary protein, but no dedicated pathway producing it as a signalling molecule has been identified.
Several cell-culture reports describe increased telomerase activity after treatment, measured by enzyme assays or by transcript levels. Results differ between cell types and laboratories, and measured telomere lengthening has been reported in some studies but not in others, which leaves the physiological relevance open.
Epitalon is a synthetic tetrapeptide composed of four amino acids: alanine, glutamate, aspartate, and glycine. It is written as Ala-Glu-Asp-Gly. The free peptide has a molecular weight of about 390 daltons and is normally supplied as a lyophilized powder.