A practical reference on pineal peptides: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2026-08-01 and is reviewed periodically as new material appears.
The peptide is a synthetic analogue of epithalamin, a preparation extracted from bovine pineal glands. Investigators sought a short, chemically defined molecule that would reproduce some of the endocrine and gerontological observations attributed to the glandular extract. Proposed mechanisms centre on induction of telomerase activity, an effect reported in cultured human somatic cells in the early 2000s, together with influences on melatonin secretion and neuroendocrine regulation. Those mechanisms remain incompletely characterised, and the reported telomerase response has not been consistently reproduced by independent groups working in comparable systems.
Published work on this compound consists mainly of in vitro experiments, animal studies, and small clinical investigations, a substantial share of which appeared in Russian-language journals. Sample sizes are generally small, control conditions differ between studies, and several endpoints rely on markers whose clinical meaning is itself debated. Reviews of the longevity field treat the peptide as an early example of telomerase-directed research rather than an established intervention. Regulatory treatment varies by country: some jurisdictions place it under prescription controls, others treat it as a laboratory material, and importation may be restricted regardless of local status.
Epitalon is a synthetic tetrapeptide whose sequence is alanine–glutamate–aspartate–glycine, commonly abbreviated AEDG. It was developed in Russia during the 1980s and 1990s by investigators associated with the St. Petersburg Institute of Bioregulation and Gerontology, who studied short peptides as regulators of gene expression and tissue function. The alternative spelling epithalon appears interchangeably in the literature, and the two names refer to the same molecule. Outside Russia it is encountered chiefly as a research chemical rather than a licensed medicine, and it holds no approval from the United States Food and Drug Administration or the European Medicines Agency.
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.
Epitalon is a synthetic tetrapeptide with the sequence alanine–glutamate–aspartate–glycine, commonly abbreviated AEDG. Its design traces to epithalamin, a peptide fraction prepared from bovine pineal gland extracts that researchers in Saint Petersburg began investigating in the 1970s. The compound has a molecular formula of C14H22N4O9 and a nominal molecular mass near 390 daltons. It holds no approved drug status in the United States or the European Union, and material sold under this name is generally offered as a research chemical rather than a finished pharmaceutical product.
| Property | Value | Notes |
|---|---|---|
| Peptide sequence | Ala-Glu-Asp-Gly | Often abbreviated AEDG in research literature |
| Common synonyms | Epithalon, epitalon, AEDG | Spelling variants refer to the same tetrapeptide |
| Molecular formula | C14H22N4O9 | Theoretical monoisotopic mass near 390.35 Da |
| Appearance | White to off-white powder | Typically supplied as a lyophilised solid |
| Solubility class | Freely soluble in water | Hydrophilic peptide; dissolves in aqueous buffer |
Most experimental work has been carried out in cell culture and animal models. Several reports describe changes in telomerase activity and proliferation in cultured cells, while rodent studies have examined lifespan, melatonin rhythm and reproductive endpoints. Human data remain limited, and much of the published clinical material consists of small trials with incomplete reporting of methods and controls. Whether the cell and animal findings translate into measurable effects in people is an open question, and the mechanistic basis of the reported telomerase changes is not fully established.
Discussions in the literature often conflate three distinct entities: the pineal extract epithalamin, the isolated tetrapeptide AEDG, and commercial preparations sold under similar names. Reviews citing older Russian-language studies sometimes omit detail on purity, route of administration and control groups, which makes cross-study comparison difficult. Researchers working with the compound generally note the need for independent replication, standardized enzyme assays, and clearer reporting of peptide identity. These caveats are relevant when weighing claims that appear in secondary sources rather than in primary reports.
Material supplied for laboratory use is normally a lyophilised white to off-white powder that dissolves readily in water and in isotonic saline. Lyophilised cakes are hygroscopic and should be equilibrated to room temperature before opening to limit condensation on the solid. Solutions are typically prepared at milligram-per-millilitre concentrations and divided into single-use aliquots, because repeated freeze–thaw cycles degrade short peptides. Aqueous solutions are far less stable than the dry powder, and identity is usually verified by mass spectrometry alongside purity estimation from reversed-phase high-performance liquid chromatography.
Epitalon is a synthetic linear tetrapeptide with the sequence alanine–glutamate–aspartate–glycine, abbreviated AEDG. Its molecular formula is C14H22N4O9 and the calculated mass is approximately 390.35 g/mol. The compound is made by solid-phase peptide synthesis rather than extracted from tissue, although early work described it as a short fragment of a peptide fraction obtained from bovine pineal extract. In the research literature the spelling epitalon and the variant epithalone both appear, while AEDG is the standard code used in peptide nomenclature.
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.
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.
Storage recommendations center on limiting moisture, heat, and light. The dry powder is generally kept at minus 20 degrees Celsius, and some suppliers recommend minus 80 degrees for long-term archival. Once dissolved, solutions are usually aliquoted and frozen to avoid repeated freeze-thaw cycles, which can promote aggregation or degradation. Aqueous stability depends on pH and concentration, and buffered saline is often preferred over plain water for biological work. Stability data specific to epitalon remain limited, so general peptide-handling practices are applied by analogy rather than from product-specific validation.
Epitalon is a synthetic tetrapeptide with the sequence alanine-glutamate-aspartate-glycine, abbreviated AEDG. Its molecular formula is C14H22N4O9 and its calculated monoisotopic mass is approximately 390.35 daltons. The compound does not occur naturally as a free peptide; it is produced by solid-phase peptide synthesis. Because it contains two acidic residues and no basic residues, the neutral form carries a net negative charge at physiological pH. This charge profile influences how the peptide behaves in solution and during chromatographic analysis.
Laboratory-grade epitalon is typically supplied as a lyophilized powder. Purity is commonly assessed with reverse-phase high-performance liquid chromatography, often paired with mass spectrometry to confirm molecular identity. Amino acid analysis and peptide mapping can provide additional confirmation of sequence. Certificates of analysis for research materials frequently report purity above 95 percent, although the methods behind such figures vary between suppliers. The absence of a pharmacopeial monograph means that no single standardized assay defines the compound, so reported results depend on the analytical protocol chosen.
Legal opium production is allowed under the United Nations Single Convention on Narcotic Drugs and other international drug treaties, subject to strict supervision by the law enforcement agencies of individual countries. The leading legal production method is the Robertson-Gregory process, whereby the entire poppy, excluding roots and leaves, is mashed and stewed in dilute acid solutions. The alkaloids are then recovered via acid-base extraction and purified. The exact date of its discovery is unknown, but it was described by Wurtz in his Dictionnaire de chimie pure et appliquée published in 1868. Legal opium production in India is much more traditional. As of 2008, opium was collected by farmers who were licensed to grow 0.1 hectares (0.25 acres) of opium poppies, who to maintain their licences needed to sell 56 kilograms of unadulterated raw opium paste. The price of opium paste is fixed by the government according to the quality and quantity tendered. The average is around 1500 rupees (US$29) per kilogram. Some additional money is made by drying the poppy heads and collecting poppy seeds, and a small fraction of opium beyond the quota is sometimes consumed locally or diverted to the black market. The opium paste is dried and processed into government opium and alkaloid factories before it is packed into cases of 60 kilograms for export. Purification of chemical constituents is done in India for domestic production, but typically done abroad by foreign importers.
== Mechanism of action == Bleomycin acts by induction of DNA strand breaks. Some studies suggest bleomycin also inhibits incorporation of thymidine into DNA strands. DNA cleavage by bleomycin depends on oxygen and metal ions, at least in vitro. The exact mechanism of DNA strand scission is unresolved, but it has been suggested that bleomycin chelates metal ions (primarily iron), producing a pseudoenzyme that reacts with oxygen to produce superoxide and hydroxide free radicals that cleave DNA. An alternative hypothesis states that bleomycin may bind at specific sites in the DNA strand and induce scission by abstracting the hydrogen atom from the base, resulting in strand cleavage as the base undergoes a Criegee-type rearrangement, or forms an alkali-labile lesion.
volume (ideally no shrinkage occurs until some bound water is lost, that is, until wood is dried below FSP); strength (strengths generally increase consistently as the wood is dried below the FSP, except for impact-bending strength and, in some cases, toughness); electrical resistivity, which increases very rapidly with the loss of bound water when the wood dries below the FSP.
Nitazenes are a chemically defined class of substances derived from the parent compound nitazene. Nitazenes were developed in the second half of the 1950s by the Swiss company Ciba AG as pain-relieving agents. They are important as centrally active, selective μ-opioid receptor agonists. The high potency of fentanyl (in humans) is matched by a few nitazenes and surpassed by etonitazene and isotonitazene. Nitazenes were never included in the pharmacopoeia of human or veterinary medicine and have not been approved for human use. Since 2019, highly potent nitazenes have proliferated as ″new synthetic opioids″ in the North American and European narcotics markets and as such have become a formative component of the opioid epidemic in the United States. Overdoses of nitazene opioids have led to several hundred documented fatalities.
After structural comparison with different species of Penicillium, Fleming believed that his specimen was Penicillium chrysogenum, a species described by an American microbiologist Charles Thom in 1910. Charles John Patrick La Touche, an Irish botanist, had recently joined St Mary's as a mycologist, and he identified the specimen as Penicillium rubrum, the identification used by Fleming in his publication. In 1931, Thom re-examined different Penicillia, including that of Fleming's specimen, and he came to the conclusion that Fleming's specimen was P. notatum, a member of the P. chrysogenum series. From then on, Fleming's mould was synonymously referred to as P. notatum and P. chrysogenum. To resolve the confusion, the Seventeenth International Botanical Congress held in Vienna, Austria, in 2005 formally adopted P. chrysogenum as the name. Whole-genome sequence and phylogenetic analysis in 2011 revealed that Fleming's mould belongs to P. rubens, a species described by Belgian microbiologist Philibert Biourge in 1923. The source of the fungal contamination in Fleming's experiment remained the subject of speculation for several decades. Fleming suggested in 1945 that the fungal spores came through the window facing Praed Street, but was disputed by his co-workers, who testified much later that Fleming's laboratory window was kept shut, and Fleming was unable to reach the window to open it. A consensus developed that the mould had come from La Touche's laboratory, a floor below Fleming's, and that spores had drifted in through the open doors.
Sources: en.wikipedia.org
Cold Spring is a city in Stearns County, Minnesota, United States, at the gateway of the Sauk River Chain of Lakes, an interconnected system of 14 bay-like lakes fed and connected by the Sauk River. Cold Spring is part of the St. Cloud metropolitan area. Its population was 4,164 at the 2020 census.
He was suspended for two years which, with backdating, ended in November 2016; as a result, he served approximately fourteen months of his suspension and missed the entire 2016 season, during which time he had intended to coach Nuriootpa Rovers Football Club in the Barossa Light & Gawler Football League. Slattery completed a Bachelor of Agricultural Science from the University of Melbourne in late 2010, and also undertook a short course in Wine Appreciation and Making at Armadale Cellars in 2011. In recognition of his success in juggling football and study commitments, Slattery was awarded the AFL Players Association's Education and Training Excellence Award in 2011.
== Use and effects == EiPLA has been identified in blotter containing doses of 86 to 97 μg base equivalent per tab. Blotter containing 200 μg per tab has also been described. Anecdotal reports suggest that EiPLA produces psychedelic effects but is less potent than LSD.
Once the tobacco is cured, workers tie it into small bundles of about 20 leaves, called hands, or use a machine to make large blocks, called bales. The hands or bales are aged for one to three years to improve flavor and reduce bitterness.
Sources: en.wikipedia.org
With the advantage of being located near the Arabian Peninsula, Somali traders have increasingly begun to challenge Australia's traditional dominance over the Gulf Arab livestock and meat market, offering quality animals at very low prices. In response, Gulf Arab states have started to make strategic investments in the country, with Saudi Arabia building livestock export infrastructure and the United Arab Emirates purchasing large farmlands. Somalia is also a major world supplier of frankincense and myrrh. The modest industrial sector, based on the processing of agricultural products, accounts for 10% of Somalia's GDP. According to the Somali Chamber of Commerce and Industry, over six private airline firms also offer commercial flights to both domestic and international locations, including Daallo Airlines, Jubba Airways, African Express Airways, East Africa 540, Central Air and Hajara. In 2008, the Puntland government signed a multimillion-dollar deal with Dubai's Lootah Group, a regional industrial group operating in the Middle East and Africa. According to the agreement, the first phase of the investment is worth Dhs 170 m and will see a set of new companies established to operate, manage and build Bosaso's free trade zone and sea and airport facilities. The Bosaso Airport Company is slated to develop the airport complex to meet international standards, including a new 3,400 m (11,200 ft) runway, main and auxiliary buildings, taxi and apron areas, and security perimeters.
In November 1944, the division and several attached units were redesignated as Panzerkorps Großdeutschland. By March 1945, the Panzer Grenadier Division Großdeutschland had been reduced to around 4,000 men after the Battle of Memel. It had only one Sturmgeschütz III self-propelled gun, one Panzer IV, five Panthers, and six Tiger Is by 15 March 1945. By 25 April, the division was engaged in heavy fighting in the battles around Pillau. Eight hundred men of the division were evacuated on ferries via the Baltic Sea and surrendered to British forces in Schleswig-Holstein on 9 May. The rest were either killed or captured during the fighting in Pillau or surrendered to Soviet forces on 9 May on the Vistula spit.
== Awards == Hackenberger has received numerous awards for his work, including the Heinz Maier-Leibnitz Prize of the German Research Foundation (2011), the ORCHEM Prize of the German Chemical Society (2012), the Zervas Award of the European Peptide Society (2018), the Breakthrough of the Year Award in the life sciences from the Falling Walls Foundation (2020), the Astra-Zeneca Award of the Royal Society of Chemistry (2023), the Xiaoyu Hu Memorial Award of the Chinese Peptide Society (2023), and the Max Bergmann Medal (2024).
Because of their costs, many transgender women cannot afford GnRH modulators and must use other, often less effective options for testosterone suppression. However, in countries with publicly funded health care, such as France, they are becoming more common: they are for instance prescribed as standard practice for transgender women in the United Kingdom, where the National Health Service (NHS) covers them. This is in contrast to the United States. Another drawback of GnRH modulators is that most of them are peptides and are not orally active, requiring administration by injection, implant, or nasal spray. However, non-peptide and orally active GnRH antagonists, elagolix (Orilissa) and relugolix (Relumina), were introduced for medical use in 2018 and 2019, respectively. But they are under patent protection and, as with other GnRH modulators, are very expensive at present. In adolescents of either sex, GnRH modulators can be used to suppress puberty. The eighth edition of the World Professional Association for Transgender Health's Standards of Care permit its use from Tanner stage 2 and recommends GnRH agonists as the preferred method of puberty blocking.
=== The pre-war situation in Bosnia and Herzegovina === With the fall of communism and the start of the break-up of Yugoslavia, the old communist doctrine of tolerance began to lose its strength, creating an opportunity for nationalist elements in the society to spread their influence. On the first multi-party elections that took place in November 1990 in Bosnia and Herzegovina, the three largest ethnic parties in the country won: the Bosniak Party of Democratic Action, the Serbian Democratic Party and the Croatian Democratic Union of Bosnia and Herzegovina. After the elections, they formed a coalition government. Parties shared power along the ethnic lines so that the President of the Presidency of the Socialist Republic of Bosnia and Herzegovina was a Bosniak, president of the Parliament was a Bosnian Serb and the prime minister a Bosnian Croat.
Sources: en.wikipedia.org
Epitalon is a synthetic four-amino-acid peptide with the sequence alanine–glutamate–aspartate–glycine, also written AEDG. It was developed in Russian gerontology research and is studied for proposed effects on telomerase, melatonin regulation, and neuroendocrine function. It is not an approved pharmaceutical in the United States or the European Union.
No. Epithalamin is a peptide-rich extract prepared from bovine pineal glands, while epitalon is a short synthetic peptide designed as a defined analogue of it. The synthetic version was intended to provide a reproducible molecule with some of the same proposed biological activity.
Telomere elongation and telomerase activation have been reported in cultured human somatic cells, but evidence from living human subjects is limited and has not been independently confirmed at scale. Reported findings come largely from small studies with differing designs, so the question remains open rather than settled.
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.