Everything below concerns research chemical. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-02-23. Numbers and descriptions here follow the published literature rather than marketing material.
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.
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.
Reversed-phase high-performance liquid chromatography is the standard approach for assessing purity, usually with ultraviolet detection near 214 nm, where the peptide bond absorbs. Mass spectrometry, most often with electrospray ionization, confirms the molecular mass and helps reveal truncation or deletion byproducts. Amino acid analysis can verify composition, and counterion content is sometimes measured because peptides purified with trifluoroacetic acid retain variable amounts of that salt. Purity figures reported without a stated method and detection wavelength are difficult to interpret.
Material sold for research use varies widely in documented quality. A useful verification package includes a certificate of analysis that states peptide content rather than only net weight, the chromatographic method and column used, and a mass spectrum consistent with the expected mass. Independent testing by a third-party laboratory is occasionally reported. Statements of identity resting only on a supplier label provide little assurance, and the gap between nominal mass and actual peptide content can be substantial once counterions and residual water are counted.
Peptides of this size are generally stable as dry solids but degrade in solution over time. The principal routes are hydrolysis of the peptide backbone and oxidation, with hydrolysis favoured by elevated temperature and extreme pH. Aqueous solutions held at room temperature can show measurable loss of purity within days, while frozen aliquots are considerably more durable. Because the sequence contains neither cysteine nor methionine, oxidation is less of a concern than for many other peptides, but pH control during handling still matters.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C14H22N4O9 | Synthetic tetrapeptide, four residues |
| Nominal mass | Approximately 390 Da | Free peptide; salt forms differ |
| Appearance | White to off-white powder | Commonly supplied lyophilised |
| Solubility class | Freely soluble in water | Also dissolves in aqueous buffer |
| Typical storage | −20 °C, desiccated | Cold packs used during transport |
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 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.
Verification of research-grade material involves comparing a supplier chromatogram against an in-house reference, checking the observed mass against the calculated value, and where possible confirming residue order by tandem mass spectrometry or enzymatic peptide mapping. Purity claims should be read alongside the method used to obtain them, because detection wavelength and integration settings alter the result. Batch-specific data, rather than a generic grade statement, is the informative part of a certificate.
Identity and purity of epitalon samples are normally established by reversed-phase high-performance liquid chromatography with ultraviolet detection near 214 nanometres, combined with mass spectrometry. The mass spectrum confirms the expected molecular ion and can reveal truncated or oxidised by-products. Amino acid analysis after acid hydrolysis verifies that the four residues are present in the expected ratio. Certificates typically report a purity figure taken from chromatographic peak area, expressed as a percentage of total integrated signal.
The parent extract epithalamin was characterised as a low-molecular-weight fraction of pineal tissue rather than a single defined chemical entity. Researchers fractionated it and tested successive fragments for activity, a screening approach typical of peptide discovery work in that era. Epitalon emerged from that process as one of the shorter sequences of interest. Because the original extract was never fully resolved into individual components, claims about which constituent drives a given effect rest on inference. This distinction matters when reading older reports that attribute extract observations to the tetrapeptide itself.
Epitalon is a synthetic tetrapeptide with the residue sequence alanine-glutamate-aspartate-glycine, commonly abbreviated AEDG. Its monoisotopic mass is approximately 390.35 daltons, and it is usually supplied as a lyophilised trifluoroacetate or acetate salt. The compound was derived from a pineal gland extract called epithalamin, a heterogeneous preparation investigated in the former Soviet Union. Researchers associated with the Saint Petersburg Institute of Bioregulation and Gerontology described the tetrapeptide as a constituent fragment of that extract. Commercial material is offered as a laboratory reagent rather than as a finished pharmaceutical product.
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.
Regulatory status varies by country and is not harmonized. Epitalon is not an approved drug in major Western jurisdictions. In some countries it is sold as a research chemical, and in others it has appeared in products marketed for other categories. This inconsistent status means that purity, labeling accuracy, and documentation differ widely between suppliers, and verification of identity and purity through independent analysis is the usual way buyers assess a given lot.
Epitalon appears in the literature primarily through a small number of research groups, most of them associated with the St. Petersburg Institute of Bioregulation and Gerontology. Publications describe cell culture experiments, animal studies, and a limited number of small human studies. Independent replication outside this network is sparse. As a result, reviews of the topic usually separate descriptive reports of observed effects from the question of whether those effects generalize, and they note the difficulty of comparing studies that use different preparations and endpoints.
=== Human genes === Na+/K+ transporting: ATP1A1, ATP1A2, ATP1A3, ATP1A4, ATP1B1, ATP1B2, ATP1B3, ATP1B4 Ca2+ transporting: ATP2A1, ATP2A2, ATP2A3, ATP2B1, ATP2B2, ATP2B3, ATP2B4, ATP2C1, ATP2C2 H+/K+ exchanging: ATP4A H+ transporting, mitochondrial: ATP5F1A, ATP5F1B, ATP5F1C, ATP5C2, ATP5F1D, ATP5F1E, ATP5F1, ATP5MC1, ATP5MC2, ATP5MC3, ATP5PD, ATP5ME, ATP5PF, ATP5MF, ATP5MG, ATP5L2, ATP5PO, ATP5S, MT-ATP6, MT-ATP8 H+ transporting, lysosomal: ATP6AP1, ATP6AP2, ATP6V1A, ATP6V1B1, ATP6V1B2, ATP6V1C1, ATP6V1C2, ATP6V1D, ATP6V1E1, ATP6V1E2, ATP6V1F, ATP6V1G1, ATP6V1G2, ATP6V1G3, ATP6V1H, ATP6V0A1, ATP6V0A2, ATP6V0A4, ATP6V0B, ATP6V0C, ATP6V0D1, ATP6V0D2, ATP6V0E Cu2+ transporting: ATP7A, ATP7B Class I, type 8: ATP8A1, ATP8B1, ATP8B2, ATP8B3, ATP8B4 Class II, type 9: ATP9A, ATP9B Class V, type 10: ATP10A, ATP10B, ATP10D Class VI, type 11: ATP11A, ATP11B, ATP11C H+/K+ transporting, nongastric: ATP12A type 13: ATP13A1, ATP13A2, ATP13A3, ATP13A4, ATP13A5
=== Municipal politics (2025–2026) === On September 17, 2025, Findlay became the advisory board chair of the Conservative Electors Association, a newly formed municipal party in British Columbia. Her role was to help with candidate recruitment and policy development. In February 2026, Findlay was involved in a launch event for the Conservative Electors Association, where they announced the slate of candidates for the 2026 Surrey municipal election.
=== Blood === Various mechanisms can cause anemia in rheumatoid arthritis, which is by far the most common abnormality of the blood cells. The chronic inflammation caused by RA leads to raised hepcidin levels, leading to anemia of chronic disease where iron is poorly absorbed and also sequestered into macrophages. The red cells are of normal size and color (normocytic and Normochromic). A low white blood cell count usually only occurs in people with Felty's syndrome with an enlarged liver and spleen. The mechanism of neutropenia is complex. An increased platelet count occurs when inflammation is uncontrolled.
PKU is an autosomal recessive metabolic genetic disorder. As such, two PKU alleles are required for an individual to experience symptoms of the disease. For a child to inherit PKU, both parents must have and pass on the defective gene. If both parents are carriers for PKU, any child they have will have a 25% chance to be born with the disorder, a 50% chance the child will be a carrier, and a 25% chance the child will neither develop nor be a carrier for the disease. PKU is characterized by homozygous or compound heterozygous mutations in the gene for the hepatic enzyme phenylalanine hydroxylase (PAH), rendering it nonfunctional. This enzyme is necessary to metabolize the amino acid phenylalanine (Phe) to the amino acid tyrosine. When PAH activity is reduced, Phe accumulates and is converted into phenylpyruvate (also known as phenylketone), which can be detected in the urine. Carriers of a single PKU allele do not exhibit symptoms of the disease, but appear to be protected to some extent against the fungal toxin ochratoxin A. Louis Woolf suggested that this accounted for the persistence of the allele in certain populations, in that it confers a selective advantage—in other words, being a heterozygote is advantageous. The gene for PAH is located on chromosome 12 in the bands 12q22-q24.2. As of 2000, around 400 disease-causing mutations had been found in the PAH gene. This is an example of allelic genetic heterogeneity.
Sources: en.wikipedia.org
==== Somatostatin analogues ==== The primary medical treatment of acromegaly is to use somatostatin analogues – octreotide (Sandostatin) or lanreotide (Somatuline). Somatostatin analogues are also sometimes used to shrink large tumors before surgery. Because octreotide inhibits gastrointestinal and pancreatic function, long-term use causes digestive problems such as loose stools, nausea, and gas in one-third of people. In addition, approximately 25 percent of people with acromegaly develop gallstones, which are usually asymptomatic. In some cases, octreotide treatment can cause diabetes because somatostatin and its analogues can inhibit the release of insulin. With an aggressive adenoma that is not able to be operated on, there may be a resistance to octreotide in which case a second-generation SSA, pasireotide, may be used for tumor control. However, insulin and glucose levels should be carefully monitored as pasireotide has been associated with hyperglycemia by reducing insulin secretion.
== Causes == Gynecomastia is thought to be caused by an altered ratio of estrogens to androgens mediated by an increase in estrogen action, a decrease in androgen action, or a combination of these two factors. Estrogen and androgens have opposing actions on breast tissue: estrogens stimulate proliferation while androgens inhibit proliferation. The cause of gynecomastia is unknown in around 25% of cases. Known causes can be physiologic (occurring normally) or non-physiologic due to underlying pathologies such as drug use, chronic disease, tumors, or malnutrition.
== Cause == Cutaneous vasculitis can have various causes, including but not limited to medications, bacterial and viral infections, or allergens. It is estimated that 45–55% of cases are idiopathic, meaning the cause is unknown. In cases where a cause can be determined, medications and infectious pathogens are most common in adults, while IgA vasculitis (Henoch–Schönlein purpura) frequently affects children. Other etiologies include autoimmune conditions and malignancies, usually hematologic (related to the blood).
== History == Hepcidin was initially reported and named in January 1998, after it was observed that it was produced in the liver and appeared to have bactericidal (bacteria-killing) properties. Detailed descriptions were published in 2000–2001. Although it is primarily synthesized in the liver, smaller amounts are synthesized in other tissues such as fat cells. Hepcidin was first discovered in human urine and blood serum. Soon after this discovery, researchers discovered that hepcidin production in mice increases in conditions of iron overload as well as inflammation. Genetically modified mice engineered to overexpress hepcidin died shortly after birth with severe iron deficiency, again suggesting that hepcidin plays a central and not redundant role in iron regulation. The first piece of evidence that linked hepcidin to the clinical condition known as the anemia of inflammation came from the lab of Nancy Andrews in Boston, when researchers looked at tissue from two patients with liver tumors with a severe microcytic anemia that did not respond to iron supplements. The tumor tissue appeared to be overproducing hepcidin, and contained large quantities of hepcidin mRNA. Removing the tumors surgically cured the anemia.
The Celtic Boii settled there and the region was first mentioned on the map of Ptolemaios in the 2nd century AD. The Germanic tribe of the Marcomanni dominated the entire core of the region in later centuries. Those tribes already built cities like Brno, but moved west during the Migration Period. In the 7th century AD Slavic people moved in and were united under Samo's realm. Later in the High Middle Ages Germans settled into the less populated border region.
Sources: en.wikipedia.org
=== First Empire === September 15, 1807: If a husband goes bankrupt, the wife's personal assets are also affected. March 17, 1808: Decree organizing the university bans women from entering colleges or lycées. March 29, 1809: Decree organizing Napoleon's imperial houses in Écouen and Saint-Denis to educate battlefield orphans' daughters as "future mothers." 1810: Penal Code of 1810 includes measures specific to women or differentiates penalties by sex. January 19, 1811: Decree on foundlings, abandoned children, and poor orphans, with education differing by sex. October 15, 1812: Decree on the Théâtre-Français's oversight, organization, administration, accounting, police, and discipline, admitting equal numbers of male and female students. February 5, 1813: Organic Senatus-Consultum on imperial regency and the coronation of the empress and prince imperial, prioritizing the empress for regency and barring her remarriage.
=== Organ meats/offal === Lamb's liver, known as lamb's fry in New Zealand and Australia, is eaten in many countries. It is the most common form of offal eaten in the UK, traditionally used in the family favourite and pub grub staple of liver with onions, potentially also with bacon and mashed potatoes. It is a major ingredient, along with the lungs and heart (the pluck), in the traditional Scottish dish of haggis. Lamb testicles or lamb fries are a delicacy in many parts of the world. Lamb kidneys are found in many cuisines across Europe and the Middle East, often split into two halves and grilled (on kebabs in the Middle East), or sautéed in a sauce. They are generally the most highly regarded of all kidneys. Lamb sweetbreads are a delicacy in many cuisines.
In 1949, its genetic transmission was determined by E. A. Beet and J. V. Neel. In 1954, it was established that carriers of the abnormal gene are protected to some degree against malaria, which accounts for its persistence in populations threatened by malaria.
Rockefeller Benjamin Jealous (1994), president of the NAACP Ai-jen Poo (1996), activist, recipient of the MacArthur Fellowship in 2014 Risë Wilson (1997), activist Anna Baltzer (2002), activist for Palestinian human rights Ady Barkan (2006), activist and organizer for Center for Popular Democracy Tourmaline (2006), activist and filmmaker Emma Sulkowicz (2015), performance activist known for Mattress Performance (Carry That Weight) and Ceci N'est Pas Un Viol Coleman Hughes (2020), activist and writer on issues of race and racism Henry Williams (2022), political activist and chief of staff of the Mike Gravel 2020 presidential campaign
Tests performed by SHIELD Illinois represent 12% of all SARS-CoV-2 tests in Illinois and more tests than 24 entire states. To achieve this, SHIELD Illinois ultimately grew from a team of 30 to over 300 employees and more than 1,000 contractors.
Sources: en.wikipedia.org
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.
No endogenous peptide with this exact sequence has been described as a circulating hormone or signalling molecule. The tetrapeptide was designed as a synthetic analogue based on fragments observed in pineal preparations. Any activity discussed in the literature therefore refers to administered material rather than to a natural pool of the compound.
It is not an approved medicine in major jurisdictions and does not appear in the major pharmacopoeias. Material is usually distributed as a research chemical or laboratory reagent. Such labelling places handling responsibility on the purchaser and does not indicate that a regulatory body has reviewed the substance.
The powder is normally kept at −20 °C or below in a sealed, moisture-protected container. Letting the vial reach room temperature before opening helps prevent condensation on the contents.