If you have been reading about epithalamin and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.
Last reviewed on 2026-05-21. Where a claim depends on a specific study, the study is described rather than over-claimed.
The most frequently cited laboratory finding is that AEDG increased telomerase activity and extended telomere length in cultured human somatic cells. That work used fetal fibroblast strains and reported changes in enzyme activity alongside altered division counts. Replication by unrelated groups has been limited, and the published record is largely a single-laboratory series rather than a multi-centre programme. The result supports a hypothesis about peptide influence on gene expression in cell culture; it does not by itself establish an effect on telomere length in living animals or in people.
Animal and clinical reports appear mainly in Russian-language journals from the 1990s and 2000s, covering endpoints such as melatonin rhythm, lifespan in aged rodents, and retinal function. Many of these papers involve small groups, lack blinding or placebo comparison, and are difficult to retrieve through indexed databases. Review articles published in English generally summarise the claims without reanalysing the underlying data. Because no large randomised trial exists, the clinical importance of these reported effects stays unresolved and is properly described as an open question.
Epitalon is the common name for a synthetic tetrapeptide with the sequence alanine-glutamate-aspartate-glycine, usually abbreviated AEDG. All four residues are proteinogenic amino acids, and the free peptide has a calculated mass near 390 grams per mole. Because the chain is short and carries no modifications, it is assembled readily by solid-phase synthesis and is distributed mainly as a freeze-dried solid for laboratory work. Catalogue listings use the spellings epitalon, epithalone, and simply AEDG, and the three refer to the same sequence.
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.
| Property | Value | Notes |
|---|---|---|
| Regulatory status | Not an approved drug | Marketed in most countries as a research chemical |
| Main literature language | Russian and English | Early reports concentrated in Russian journals |
| Typical stated purity | ≥95% by HPLC | Supplier declaration, seldom independently verified |
| Principal studied endpoint | Telomerase activity in vitro | Measured in cultured human cells |
| Reported administration routes | Subcutaneous, intranasal | Described in exploratory use reports |
Identity and purity are checked by reversed-phase high-performance liquid chromatography, usually with ultraviolet detection near 214 nanometres, where the peptide bond absorbs. Mass spectrometry confirms the expected mass and reveals whether truncation products or adducts are present. Acid hydrolysis followed by amino acid analysis gives the residue ratio, which should approximate one alanine, one glutamate, one aspartate and one glycine. Counter-ions such as acetate or trifluoroacetate remain in the dried product and lower net peptide content, so a stated purity figure on a label does not by itself describe how much peptide a vial holds.
Regulatory treatment differs by country. No formulation of epitalon holds a marketing authorisation as a medicine in the United States or the European Union, where material sold for laboratory use is handled as a research chemical and is not intended for human consumption. In Russia, several short peptide preparations from the same institute's peptide series are registered medicinal products, and epitalon appears in that national context. Elsewhere it is frequently offered as a cosmetic ingredient, a category with lighter requirements. Advertising claims about longevity or disease prevention are restricted in most jurisdictions, which limits how sellers describe the compound.
Epitalon is a synthetic four-amino-acid peptide with the sequence alanine-glutamate-aspartate-glycine, commonly abbreviated AEDG. Its molecular formula is C14H22N4O9, and its calculated molar mass is approximately 390.35 grams per mole. The compound is a short fragment related to a peptide fraction isolated from bovine pineal gland extracts, and it is normally supplied as a lyophilised powder intended for laboratory research. It is not a registered pharmaceutical product in most countries.
The peptide emerged from research carried out in Saint Petersburg from the late 1980s onward, where investigators searched for shorter active fragments of a pineal preparation known as epithalamin. The name epitalon was chosen to reflect that parent extract. Early reports described effects on neuroendocrine markers and on the lifespan of laboratory animals. Much of that work appeared in Russian-language journals, with English translations following later, which affects how readily the original protocols can be assessed by outside groups.
Published studies on epitalon are dominated by a small number of research groups, and independent replication in other laboratories remains limited. Proposed mechanisms include activation of telomerase and modulation of melatonin rhythms, but the evidence for either rests mainly on cell cultures and animal models. Whether the peptide produces comparable effects in humans is an open question, and the absence of large controlled trials means the literature is best read as exploratory rather than settled.
== Regulation == A cis-regulatory element called the GAIT element is involved in the selective translational silencing of the Ceruloplasmin transcript. The silencing requires binding of a cytosolic inhibitor complex called IFN-gamma-activated inhibitor of translation (GAIT) to the GAIT element.
== Regulation == As of 2016, the U.S. Environmental Protection Agency had conditionally registered, for a period of four years, only two nanomaterial pesticides as ingredients. The EPA differentiates nanoscale ingredients from non-nanoscale forms of the ingredient, but there is little scientific data about potential variation in toxicity. Testing protocols still need to be developed.
Antiviral proteins are proteins that are induced by human or animal cells to interfere with viral replication. These proteins are isolated to inhibit the virus from replicating in a host's cells and stop it from spreading to other cells. The Pokeweed antiviral protein and the Zinc-Finger antiviral protein are two major antiviral proteins that have undergone several tests for viruses, including HIV and influenza.
Sources: en.wikipedia.org
The transaction transferred Labcorp’s US-based biocompatibility, analytical testing, microbiological, and preclinical research services to NAMSA, enabling Labcorp to concentrate on its core preclinical drug development and chemical testing activities. In March 2026, Labcorp acquired select assets of Crouse Health, including assuming operations of Lab Alliance's 12 patient service centers.
=== Withdrawal === Users of hydromorphone may experience painful symptoms if the drug is suspended. Some people cannot tolerate the symptoms, which results in continuous drug use. Symptoms of opioid withdrawal are not easy to decipher, as there are differences between drug-seeking behaviors and true withdrawal effects. Symptoms associated with hydromorphone withdrawal include:
The UK NHS in 2019 listed Humira, Amgevita, Hulio, Hyrimoz, Idacio, and Imraldi as biosimilars available on (almost free) prescription, to be updated in February 2022. The annual cost of adalimumab, the costliest NHS drug, was expected to drop from £400m to £100m by 2021, the biggest saving in NHS history from a single drug negotiation. The best-selling drugs list published by Genetic Engineering & Biotechnology News, shows that Humira occupied the #1 position for 2015 (US$14.012 billion) and 2016 (US$16.078 billion) From 2012 until the US patent expired in 2016, Humira led the list of top-selling pharmaceutical products, and in 2016, it had US$16 billion of global sales. AbbVie reported that Humira achieved US$18.427 billion of sales in 2017. Humira had the largest worldwide drug sales in 2019 and 2020 of US$19.7bn and US$20.4bn respectively.
=== Extraterrestrial sulfuric acid === The permanent Venusian clouds are made of concentrated sulfuric acid, and produce a concentrated sulfuric acid rain, just as the clouds in the atmosphere of Earth are made of water and produce water rain. Sulfuric acid ice has been detected on Jupiter's moon Europa, where it forms when sulfur ions from Jupiter's magnetosphere implant into the icy surface.
Sources: en.wikipedia.org
Human chorionic gonadotropin injection is extensively used for final maturation induction in lieu of luteinizing hormone. In the presence of one or more mature ovarian follicles, ovulation can be triggered by the administration of HCG. As ovulation will happen between 38 and 40 hours after a single HCG injection, procedures can be scheduled to take advantage of this time sequence, such as intrauterine insemination or sexual intercourse. Also, patients that undergo IVF, in general, receive HCG to trigger the ovulation process, but have an oocyte retrieval performed at about 34 to 36 hours after injection, a few hours before the eggs actually would be released from the ovary. As hCG supports the corpus luteum, administration of hCG is used in certain circumstances to enhance the production of progesterone. Several vaccines against human chorionic gonadotropin (hCG) for the prevention of pregnancy are currently in clinical trials.
== Pathogenesis == Although the methods of action are not yet completely understood, it is hypothesized that medication-associated osteonecrosis of the jaw is related to a defect in jaw bone healing and remodelling. The inhibition of osteoclast differentiation and function, precipitated by drug therapy, leads to decreased bone resorption and remodelling. Evidence also suggests bisphosphonates induce apoptosis of osteoclasts. Another suggested factor is inhibition of angiogenesis due to bisphosphonates; this effect remains uncertain. Several studies have proposed that bisphosphonates cause excessive reduction of bone turnover, resulting in a higher risk of bone necrosis when repair is needed. It is also thought that bisphosphonates bind to osteoclasts and interfere with the remodeling mechanism in bone. To be more specific, the drug interferes with the cholesterol biosynthesis pathway through the inhibition of farnesyl diphosphate synthase. Over time, the cytoskeleton of the osteoclasts loses its function and the essential border needed for bone resorption does not form. Like aminobisphosphonates, bisphosphonates have shown to have antiangiogenic properties. Therefore, effects include an overall decrease in bone recycling/turnover as well as an increased inhibition of the absorptive bone abilities.
The inner chloroplast membrane borders the stroma and regulates passage of materials in and out of the chloroplast. After passing through the TOC complex in the outer chloroplast membrane, polypeptides must pass through the TIC complex (translocon on the inner chloroplast membrane) which is located in the inner chloroplast membrane. In addition to regulating the passage of materials, the inner chloroplast membrane is where fatty acids, lipids, and carotenoids are synthesized.
Sources: en.wikipedia.org
Small studies with human participants have been reported, chiefly in Russian-language journals, but they are limited in size and design. No large randomised controlled trial with published results is available.
The most reproducible biochemical observation comes from cultured cells, where the peptide was reported to raise telomerase activity. Whether this translates into measurable health effects in animals or humans is not established.
It is offered as a research chemical for laboratory use, which places it outside the approval pathways applied to medicines. Buyers should expect documentation to differ between suppliers.
It is a four-amino-acid peptide with the sequence alanine-glutamate-aspartate-glycine. The chain is unmodified and contains only standard proteinogenic residues, which makes it straightforward to produce by solid-phase synthesis and to characterise by standard peptide methods.