Everything below concerns epithalamin. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-03-25. Numbers and descriptions here follow the published literature rather than marketing material.
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.
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.
== Medicine == Researchers in 2011 discovered the ability of graphene to accelerate the osteogenic differentiation of human mesenchymal stem cells without the use of biochemical inducers. In 2015 researchers used graphene to create biosensors with epitaxial graphene on silicon carbide. The sensors bind to 8-hydroxydeoxyguanosine (8-OHdG) and is capable of selective binding with antibodies. The presence of 8-OHdG in blood, urine and saliva is commonly associated with DNA damage. Elevated levels of 8-OHdG have been linked to increased risk of several cancers. By the next year, a commercial version of a graphene biosensor was being used by biology researchers as a protein binding sensor platform. In 2016 researchers revealed that uncoated graphene can be used as neuro-interface electrode without altering or damaging properties such as signal strength or formation of scar tissue. Graphene electrodes in the body are significantly more stable than electrodes of tungsten or silicon because of properties such as flexibility, bio-compatibility and conductivity.
Free fatty acid receptor 2 (FFAR2), also known as G-protein coupled receptor 43 (GPR43), is a rhodopsin-like G-protein coupled receptor (GPCR) encoded by the FFAR2 gene. In humans, the FFAR2 gene is located on the long arm of chromosome 19 at position 13.12 (19q13.12). FFAR2, like other GPCRs, is located on the cell membrane and is activated by binding specific ligands, regulating various cellular functions. FFAR2 is part of the free fatty acid receptor family, which also includes FFAR1 (GPR40), FFAR3 (GPR41), and FFAR4 (GPR120). FFAR2 and FFAR3 are activated by short-chain fatty acids (SCFAs), while FFAR1 and FFAR4 respond to long-chain fatty acids. SCFAs, produced by intestinal bacteria, play a key role in various bodily functions by activating FFAR2. This receptor is implicated in regulating insulin and glucose levels, inflammation, fat tissue development, and certain cancerous and non-cancerous cell growth. Due to its role in these processes, FFAR2 has been studied for its potential involvement in conditions such as diabetes, inflammation, obesity, ketoacidosis, certain types of cancer, neurological diseases, and infections. Therapies targeting FFAR2 are being developed to modulate its activity in these conditions, offering potential new treatments for diseases influenced by SCFAs.
== Clinical significance == An abdominal muscle strain, also called a pulled abdominal muscle, is an injury to one of the muscles of the abdominal wall. A muscle strain occurs when the muscle is stretched too far. When this occurs the muscle fibers are torn. Most commonly, a strain causes microscopic tears within the muscle, but occasionally, in severe injuries, the muscle can rupture from its attachment. A rectus sheath hematoma is an accumulation of blood in the sheath of the rectus abdominis muscle. It causes abdominal pain with or without a mass. The hematoma may be caused by either rupture of the epigastric artery or by a muscular tear. Causes of this include anticoagulation, coughing, pregnancy, abdominal surgery and trauma. With an ageing population and the widespread use of anticoagulant medications, there is evidence that this historically benign condition is becoming more common and more serious. On abdominal examination, people may have a positive Carnett's sign. Most hematomas resolve without treatment, but they may take several months to resolve.
General single cell studies including growth Cellular aging: microfluidic devices such as the "mother machine" allow tracking of thousands of individual cells for many generations until they die Microenvironmental control: ranging from mechanical environment to chemical environment Precise spatiotemporal concentration gradients by incorporating multiple chemical inputs to a single device Force measurements of adherent cells or confined chromosomes: objects trapped in a microfluidic device can be directly manipulated using optical tweezers or other force-generating methods Confining cells and exerting controlled forces by coupling with external force-generation methods such as Stokes flow, optical tweezer, or controlled deformation of the PDMS (Polydimethylsiloxane) device Electric field integration Plant on a chip and plant tissue culture Antibiotic resistance: microfluidic devices can be used as heterogeneous environments for microorganisms. In a heterogeneous environment, it is easier for a microorganism to evolve. This can be useful for testing the acceleration of evolution of a microorganism / for testing the development of antibiotic resistance. Viral fusion: these devices also allow the study of the several steps and conditions required for viruses to bind and enter host cells. Information regarding efficiency, kinetics and specific steps of the binding and fusion processes can be obtained using microfluidic flow cells.
Under Xi, China's official military budget has more than doubled, reaching a record $282 billion in 2026. Though predating Xi, his administration has taken a more assertive stance towards maritime affairs, and has boosted CCP control over the maritime security forces. The PLA Navy has grown rapidly under Xi, with China adding more warships, submarines, support ships and major amphibious vessels from 2014 to 2019 than the entire number of ships serving in the United Kingdom's fleet. Aircraft carriers Shandong and Fujian entered into service under Xi in 2019 and 2025 respectively. In 2017, China established the navy's first overseas base in Djibouti. Xi has also undertaken an expansion of China's nuclear arsenal, with him calling China to "establish a strong system of strategic deterrence." The Federation of American Scientists (FAS) has estimated China's total nuclear arsenal to be 600 in 2025, with the US Department of Defense estimating that China's arsenal could reach 1,000 by 2030.
Sources: en.wikipedia.org
== Further reading == Sherman, R. A. (2003). "Maggot Therapy for Treating Diabetic Foot Ulcers Unresponsive to Conventional Therapy". Diabetes Care. 26 (2): 446–51. doi:10.2337/diacare.26.2.446. PMID 12547878. Van Der Plas, M. J. A.; Jukema, G. N.; Wai, S.-W.; Dogterom-Ballering, H. C. M.; Lagendijk, E. L.; Van Gulpen, C.; Van Dissel, J. T.; Bloemberg, G. V.; Nibbering, P. H. (2007). "Maggot excretions/secretions are differentially effective against biofilms of Staphylococcus aureus and Pseudomonas aeruginosa". Journal of Antimicrobial Chemotherapy. 61 (1): 117–22. doi:10.1093/jac/dkm407. PMID 17965032. Cazander, G.; Van Veen, K.E.B.; Bernards, A.T.; Jukema, G.N. (2009). "Do maggots have an influence on bacterial growth? A study on the susceptibility of strains of six different bacterial species to maggots of Lucilia sericata and their excretions/secretions". Journal of Tissue Viability. 18 (3): 80–7. doi:10.1016/j.jtv.2009.02.005. PMID 19362001. Cazander, Gwendolyn; Schreurs, Marco W. J.; Renwarin, Lennaert; Dorresteijn, Corry; Hamann, Dörte; Jukema, Gerrolt. N. (2012). "Maggot excretions affect the human complement system". Wound Repair and Regeneration. 20 (6): 879–86. doi:10.1111/j.1524-475X.2012.00850.x. PMID 23110586. S2CID 24568980. Mumcuoglu, Kosta Y.; Ingber, Arieh; Gilead, Leon; Stessman, Jochanan; Friedmann, Reuven; Schulman, Haim; Bichucher, Hellen; Ioffe-Uspensky, I; Miller, J; Galun, R; Raz, I (1999). "Maggot therapy for the treatment of intractable wounds". International Journal of Dermatology. 38 (8): 623–7. doi:10.1046/j.1365-4362.1999.00770.x.
The current consumer price inflation in Europe and the United States is less than 2%, compared to India's double digit inflation. The Pepsi and Coca-Cola example is meaningless in the context of Indian beverage market. More competition is lacking because of limited demand. Indian consumer has limited interest in soft drinks. Soft drinks represent less than 5% of Indian beverage market. Indian consumers prefer milk-based, tea and coffee and these account for 90% of Indian beverage market, with plenty of competing domestic brands and even European brands like Nestlé. The next most important market in India is bottled water, which outsells the combined soft drink sales of the Pepsi and Coca-Cola. Organised retail too will have numerous brands and strong competition. Comparing the 21st century to the 18th century is inappropriate. Conditions today are different. India wasn't a democracy then. Global awareness and news media have also changed. For example, China has over 57 million square feet of retail space owned by foreigners, employing millions of Chinese citizens. Yet, China hasn't become a vassal of imperialists, enjoying respect from all global powers. Other Asian countries like Malaysia, Taiwan, Thailand and Indonesia see foreign retailers as catalysts of new technology and price reduction; and they have benefited by welcoming FDI in retail. India too will benefit by integrating with the world, rather than isolating itself. With 51% FDI limit in multi-brand retailers, nearly half of any profits will remain in India.
Historically, Belize and the US have had good relations because of a shared commitment to democratic governance. Along with financial aid, the US has continuously provided disaster relief after detrimental natural disasters that have been a threat to Belize's overall stability. The US Peace Corps has also played a pivotal role in Belize. Since 1952, the US Peace Corps has a public health and education program in Belize through the US Embassy Regional Security Program in Central America. Volunteers work in rural and urban communities to address the improvement of education, economic development, public health, etc. These efforts have strengthened the relations between Belize and the US on a more community-based level. In 2025 Belize joined Barbados, the Commonwealth of Dominica, and Saint Vincent and the Grenadines in implementing full free movement, allowing nationals of the four countries to reside and work indefinitely in participating countries without work or residence permits.
Females are more aggressive than males during the courtship period, often fighting for access to mates, with fights among females accounting for more than half the aggressive interactions during this period. If females court a male that already has a partner, the incumbent female will try to repel the competitor, usually by chasing and kicking. These interactions can be prolonged, lasting up to five hours, especially when the male being fought over is single and neither female has the advantage of incumbency. In these cases, the females typically intensify their calls and displays. The sperm from a mating is stored by the female and can suffice to fertilise about six eggs. The pair mate every day or two, and every second or third day the female lays one of a clutch of five to fifteen very large, thick-shelled, green eggs. The shell is around 1 mm (0.04 in) thick, but rather thinner in northern regions according to indigenous Australians. The shell is substantially composed of calcite, and its δ13C is a function of the emu's diet. The eggs are on average 13 cm × 9 cm (5.1 in × 3.5 in) and weigh between 450 and 650 g (1.0 and 1.4 lb). The maternal investment in the egg is considerable, and the proportion of yolk to albumen, at about 50%, is greater than would be predicted for a precocial egg of this size. This probably relates to the long incubation period which means the developing chick must consume greater resources before hatching. The first verified occurrence of genetically identical avian twins was demonstrated in the emu. The egg surface is granulated and pale green.
Sources: en.wikipedia.org
Diamondback moths cause US$4 to $5 billion of damage each year worldwide. The approach is similar to the sterile technique tested on mosquitoes, where males are transformed with a gene that prevents any females born from reaching maturity. They underwent field trials in 2017. Genetically modified moths have previously been released in field trials. In this case a strain of pink bollworm that were sterilized with radiation were genetically engineered to express a red fluorescent protein making it easier for researchers to monitor them. Silkworm, the larvae stage of Bombyx mori, is an economically important insect in sericulture. Scientists are developing strategies to enhance silk quality and quantity. There is also potential to use the silk producing machinery to make other valuable proteins. Proteins currently developed to be expressed by silkworms include; human serum albumin, human collagen α-chain, mouse monoclonal antibody and N-glycanase. Silkworms have been created that produce spider silk, a stronger but extremely difficult to harvest silk, and even novel silks.
==== Obsessive–compulsive disorder ==== Psilocybin has been studied for the treatment of obsessive–compulsive disorder. It is formally under development for treatment of OCD by multiple pharmaceutical companies. These include candidates with the developmental code names SYNP-101 (Ceruvia Lifesciences) and MLS-101 (MycoMedica Life Sciences).
A well studied complex is tris(glycinato)cobalt(III). It is produced by the reaction of glycine with sodium tris(carbonato)cobalt(III). Similar synthetic methods apply to the preparation of tris(chelates) of other amino acids. Commonly amino acid complexes are prepared by ligand displacement reactions of metal aquo complexes and the conjugate bases of amino acids:
IUPAC is involved today with many processes relating to the periodic table: the recognition and naming of new elements, recommending group numbers and collective names, and the updating of atomic weights.
=== Behavior === Relatively little is known about appropriate behavioral expression for farmed species of insects. Adult black soldier flies are unlikely to be able to lek, a natural mating behavior, in most current cage sizes. Adult black soldier flies are unable to engage in natural foraging/feeding behaviors when not provided with feed. Photophobic insect larvae, or crickets of any life stage, may not be able to avoid or escape lights during some parts of rearing or processing. Selection, or genetic modification, could reduce the ability of insects to perform natural behaviors: for instance, one study genetically modified adult black soldier flies to not have wings, eliminating the ability of the flies to engage in the natural behavior of flight. This modification has not been deployed for adult black soldier flies - but flightless lines of fruit flies have been generated and are frequently sold as feeders for other animals.
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.