The short version of hGH fragment fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-06-03. Anything still debated is marked as such rather than presented as settled.
Regulatory treatment of AOD-9604 has varied. In sports anti-doping, the peptide became widely discussed during a 2013 investigation into an Australian professional sports club. Authorities at the time debated whether it fell under prohibitions on growth hormone and related substances. Later clarifications and updated lists have addressed the compound in different ways. Anyone seeking current status should consult the latest applicable rules, and commercial supply for human use is not authorized in major markets.
Research interest in AOD-9604 often focuses on whether it can influence lipid metabolism without the growth-promoting or glucose-related effects of full-length hGH. This question remains unresolved, and findings depend on model, dose, and measurement method. Some reviews treat the peptide as a historical obesity candidate rather than an active therapeutic. Others cite it in discussions of peptide fragments, metabolic signaling, and performance-enhancing substances. Clear conclusions are limited by the small number of rigorous, independent human studies.
Quality varies among research-grade suppliers, so certificates of analysis and independent testing are important for verification. A typical certificate reports purity by HPLC, identity by mass spectrometry, appearance, and sometimes residual solvents or water content. AOD9604 is often sold as a research chemical not intended for human consumption, and labels can be inaccurate. Common misconceptions include treating the peptide as a form of growth hormone, assuming supplement status, or expecting approved-drug quality from unregulated products.
AOD9604 is commonly supplied as a white to off-white lyophilized powder. The powder is typically stored at -20 °C or below, protected from light and moisture, because peptides can degrade through oxidation, hydrolysis, or aggregation. If it is reconstituted for laboratory use, an appropriate aqueous buffer or solvent is chosen, and the solution is kept cold and handled to avoid repeated freeze-thaw cycles. These practices support stability but do not imply suitability for human use.
Identity and purity are usually assessed with reversed-phase high-performance liquid chromatography and mass spectrometry. Reversed-phase HPLC separates the peptide from related impurities and can estimate purity by ultraviolet absorbance, while mass spectrometry confirms the molecular mass and detects modifications. Peptide mapping, amino acid analysis, and disulfide mapping may be used when the sequence or disulfide arrangement must be verified. Because AOD9604 contains cysteine residues, oxidation and disulfide isomers are possible quality concerns in synthetic batches.
| Property | Value | Notes |
|---|---|---|
| Primary research area | Obesity and metabolic regulation | Studied in cell, animal, and human models |
| Highest reported trial phase | Phase II | Public summaries describe mixed results |
| Common route in trials | Subcutaneous injection | Typical for peptide therapeutics |
| Regulatory example | 2013 Australian anti-doping review | Classification was debated at the time |
| Approval status | Not approved as a human medicine | Status can change by jurisdiction |
The fragment includes residues that can form an internal disulfide bond between two cysteine positions. This structural feature can influence how the peptide folds and how stable it is in solution. AOD-9604 differs from full-length hGH in size and receptor interactions; it does not contain the entire growth hormone sequence. Published descriptions sometimes use slightly different residue numbering, so sequence information should be checked against primary sources. The molecule is small compared with intact hGH, which affects analytical detection and purification approaches.
Interest in AOD-9604 arose from attempts to separate metabolic effects from growth effects attributed to hGH. Early work explored whether the fragment could influence lipolysis or fat oxidation without promoting growth. Those questions remain partly unresolved because human data are limited and results have varied across studies. The peptide is not a hormone replacement for hGH and is not equivalent to hGH in clinical use. Its research history includes both laboratory studies and commercial marketing claims that are not the same as regulatory approval.
Regulatory treatment of AOD-9604 is shaped by its classification as a peptide hormone. The World Anti-Doping Agency lists it as a prohibited substance, and many national anti-doping organizations adopt that list. It does not hold approval as a prescription medicine in the United States, the European Union, or other major markets. Products sold online are frequently labeled for research use only and may not undergo independent quality testing. Import and possession rules differ by country, so legal status depends on local law.
Proposed mechanisms for AOD-9604 focus on fat cells. Laboratory studies suggest the peptide can increase lipolysis, the breakdown of stored fat, and reduce lipogenesis, the formation of new fat. Unlike full human growth hormone, it does not appear to stimulate substantial IGF-1 production in the studies reported so far. Some evidence points to beta-adrenergic signaling, but the precise receptor targets and downstream pathways remain unresolved. The fragment is not thought to act through the classical growth hormone receptor.
Willem Vrolik, a Dutch anatomist who was also curator of the "Museum Vrolikianum", which made him privy to many specimens of bodies having birth defects, coined the term "osteogenesis imperfecta" in his bilingual Latin and Dutch language book on teratology, Illustrations of Human and Mammalian Embryogenesis, first published in 1849. Included is a description of the remains of an infant who had what is now known as perinatally fatal OI type II (as verified in a 1998 re-examination of the remains by Baljet et al.). The remains were first given to Vrolik's father, who could not make sense of them. Vrolik described poorly mineralized bones, bowed long bones, and fractures in various states of healing. Vrolik correctly determined that what he termed OI in the infant was not caused by secondary rickets, but a congenital abnormality causing primary osteopenia; he theorized this was due to a lack of "intrinsic generative energy".
=== Contributions to mechanical properties of biomaterials === Natural materials show a combination of normally contradicting mechanical properties (softness and toughness), due to their hierarchical structures of fibrils across multiple length scales. These fibrils are often oriented in a single direction, leading to anisotropic mechanical response in the resulting biocomposite material. This is a prime advantage as most of these materials withstand stresses in a single direction, and so a higher yield and fracture stress in the direction of the applied stress ensures the material structural integrity. Macro, micro, and nano fibrils enable the material to resist fracture through a series of fracture resistance mechanisms:
In 2012 and 2015 he guest-starred on Castle as Detective Ethan Slaughter, reuniting on screen with Firefly co-star Nathan Fillion. He later joined the TNT action drama The Last Ship (2014–2018) as Mike Slattery, the destroyer's second-in-command. In film, he later appeared in the western The Kid (2019) as Bob Olinger, and the sports drama American Underdog (2021) as Terry Allen. Baldwin has also worked as a voice actor, including voicing Superman in the animated film Superman: Doomsday (2007), and portraying Dutch in the video game Halo 3: ODST (2009). He provided additional voices for citizens and other miscellaneous characters in Half-Life 2: Episode Two (2007). Along with his Chuck co-star Yvonne Strahovski, he contributed voice work to Mass Effect 2 (2010), voicing the quarian marine Kal'Reegar.
The reaction between p-toluenesulfonamide (1) and ethyl chloroformate (2) in the presence of base gives tosylurethane [5577-13-9] (3). Heating that intermediate with azepane (4) leads to the displacement of the ethoxy group and the formation of tolazemide (5). Azepane proper would lead to [13078-23-4].
=== Iranian IRGC involvement === In 2013, an Iranian vessel was seized and discovered to be carrying Katyusha rockets, heat-seeking surface-to-air missiles, RPG-7s, Iranian-made night vision goggles and artillery systems that track land and navy targets 40 km away. That was en route to the Houthis. In March 2017, Qasem Soleimani, head of Iran's Quds Force, met with Iran's Islamic Revolutionary Guard Corps (IRGC) regarding the "newly accelerated effort to empower the Houthis", including the provision of weapons and training. Soleimani was quoted as saying, "At this meeting, they agreed to increase the amount of help, through training, arms and financial support." Despite the Iranian government, and Houthis both officially denying Iranian support for the group. Brigadier General Ahmad Asiri, the spokesman of the Saudi-led coalition told Reuters that evidence of Iranian support was manifested in the Houthi use of Kornet anti-tank guided missiles which had never been in use with the Yemeni military or with the Houthis and that the arrival of Kornet missiles had only come at a later time. In the same month the IRGC had altered the routes used in transporting equipment to the Houthis by spreading out shipments to smaller vessels in Kuwaiti territorial waters in order to avoid naval patrols in the Gulf of Oman due to sanctions imposed, shipments reportedly included parts of missiles, launchers, and drugs.
Sources: en.wikipedia.org
== Research centres and major projects == The Scar Free Foundation (formerly The Healing Foundation) has co-ordinated research projects in burns, cleft, conflict wounds, and scarring genetics since its inception in 1998. Notable projects include:
It may also be possible to generate isotopes in the island of stability such as 298Fl in multi-nucleon transfer reactions in low-energy collisions of actinide nuclei (such as 238U and 248Cm). This inverse quasifission (partial fusion followed by fission, with a shift away from mass equilibrium that results in more asymmetric products) mechanism may provide a path to the island of stability if shell effects around Z = 114 are sufficiently strong, though lighter elements such as nobelium and seaborgium (Z = 102–106) are predicted to have higher yields. Preliminary studies of the 238U + 238U and 238U + 248Cm transfer reactions have failed to produce elements heavier than mendelevium (Z = 101), though the increased yield in the latter reaction suggests that the use of even heavier targets such as 254Es (if available) may enable production of superheavy elements. This result is supported by a later calculation suggesting that the yield of superheavy nuclides (with Z ≤ 109) will likely be higher in transfer reactions using heavier targets. A 2018 study of the 238U + 232Th reaction at the Texas A&M Cyclotron Institute by Sara Wuenschel et al. found several unknown alpha decays that may possibly be attributed to new, neutron-rich isotopes of superheavy elements with 104 < Z < 116, though further research is required to unambiguously determine the atomic number of the products. This result strongly suggests that shell effects have a significant influence on cross sections, and that the island of stability could possibly be reached in future experiments with transfer reactions.
During 1990, in the capital city of Mogadishu, the residents were prohibited from gathering publicly in groups greater than three or four. Fuel shortages, inflation, and currency devaluation impacted the economy. A thriving black market existed in the centre of the city as banks experienced shortages of local currency for exchange. Harsh exchange control regulations were introduced to prevent export of foreign currency. Although no travel restrictions were placed on foreigners, photographing many locations was banned. During daytime in Mogadishu, the appearance of any government military force was extremely rare. Alleged late-night operations by government authorities, however, included "disappearances" of individuals from their homes. In 1991, the Barre administration was ousted by a coalition of clan-based opposition groups, backed by Ethiopia's then-ruling Derg regime and Libya. Following a meeting of the Somali National Movement and northern clans' elders, the northern former British portion of the country declared its independence as the Republic of Somaliland in May 1991. Although de facto independent and relatively stable compared to the tumultuous south, it was not recognised by any foreign government, until Israel recognised it in 2025.
==== August 2015 Salmonella ==== At almost the same time as the Simi Valley norovirus outbreak, Minnesota health officials confirmed a Salmonella outbreak that affected 17 Minneapolis-area Chipotle restaurants in mid-August 2015. The source of the outbreak was traced back to contaminated tomatoes that were grown in Mexico. The Minnesota Department of Health reported that samples from 45 victims were tested and found that their illness was caused by the Salmonella Newport bacterium as determined by DNA profiling. Later, the state officials reported that the total of persons who became infected was increased to 64 and the number Chipotle locations in which they had acquired the bacterium was increased to 22, all located within the state of Minnesota.
Sources: en.wikipedia.org
=== Dendritic secretion === Supraoptic neurons have typically 1-3 large dendrites, most of which projecting ventrally to form a mat of process at the base of the nucleus, called the ventral glial lamina. The dendrites receive most of the synaptic terminals from afferent neurons that regulate the supraoptic neurons, but neuronal dendrites are often actively involved in information processing, rather than being simply passive receivers of information. The dendrites of supraoptic neurons contain large numbers of neurosecretory vesicles that contain oxytocin and vasopressin, and they can be released from the dendrites by exocytosis. The oxytocin and vasopressin that is released at the posterior pituitary gland enters the blood, and cannot re-enter the brain because the blood–brain barrier does not allow oxytocin and vasopressin through, but the oxytocin and vasopressin that is released from dendrites acts within the brain. Oxytocin neurons themselves express oxytocin receptors, and vasopressin neurons express vasopressin receptors, so dendritically released peptides "autoregulate" the supraoptic neurons. Francoise Moos and Phillipe Richard first showed that the autoregulatory action of oxytocin is important for the milk-ejection reflex. These peptides have relatively long half-lives in the brain (about 20 minutes in the CSF), and they are released in large amounts in the supraoptic nucleus, and so they are available to diffuse through the extracellular spaces of the brain to act at distant targets.
=== Independent Namibia === When Namibia gained its independence in 1990, SWAPO became the dominant political party. Though the organisation rejected the term South West Africa and preferred to use Namibia, the organisation's original name—derived from the territory's old name—was too deeply rooted in the independence movement to be changed. However, the original full name is no longer used; only the acronym remains. SWAPO, and with it much of Namibia's government and administration, continues to be dominated by the Ovambo ethnic group, despite "considerable efforts to counter [that] perception". SWAPO president Sam Nujoma was declared Namibia's first President after SWAPO won the inaugural election in 1989. A decade later, Nujoma had the constitution changed so he could run for a third term in 1999, as it limits the presidency to two terms. In 2004, the SWAPO presidential candidate was Hifikepunye Pohamba, described as Nujoma's hand-picked successor. In 2014, the SWAPO presidential candidate was Hage Geingob, who was the vice-president of SWAPO. In 2019 presidential election, president Geingob won his second five-year term as Namibian president.
Chloroform began to replace ether as an anesthetic in the United States at the beginning of the 20th century. It was soon abandoned in favor of ether when its hepatic and cardiac toxicity, especially its tendency to cause potentially fatal cardiac dysrhythmias, became apparent. In fact, the use of chloroform versus ether as the primary anesthetic gas varied by country and region. For instance, Britain and the American South stuck with chloroform while the American North returned to ether. John Snow quickly became the most experienced British physician working with the new anesthetic gases of ether and chloroform thus becoming, in effect, the first British anesthetist. Through his careful clinical records he was eventually able to convince the elite of London medicine that anesthesia (chloroform) had a rightful place in childbirth. Thus, in 1853 Queen Victoria's accoucheurs invited John Snow to anesthetize the Queen for the birth of her eighth child. From the beginnings of ether and chloroform anesthesia until well into the 20th century, the standard method of administration was the drop mask. A mask was placed over the patient's mouth with some fabric in it and the volatile liquid was dropped onto the mask with the patient spontaneously breathing. Later development of safe endotracheal tubes changed this.
Utilizing both the freeze-casting and salting-out processing techniques on poly(vinyl alcohol) hydrogels to induce hierarchical morphologies and anisotropic mechanical properties. Directional freezing of the hydrogels helps to align and coalesce the polymer chains, creating anisotropic array honeycomb tube-like structures while salting out the hydrogel yielded out a nano-fibril network on the surface of these honeycomb tube-like structures. While maintaining a water content of over 70%, these hydrogels' toughness values are well above those of water-free polymers such as polydimethylsiloxane (PDMS), Kevlar, and synthetic rubber. The values also surpass the toughness of natural tendon and spider silk.
The connective tissue of the lungs is made up of elastic and collagen fibres that are interspersed between the capillaries and the alveolar walls. Elastin is the key protein of the extracellular matrix and is the main component of the elastic fibres. Elastin gives the necessary elasticity and resilience required for the persistent stretching involved in breathing, known as lung compliance. It is also responsible for the elastic recoil needed. Elastin is more concentrated in areas of high stress such as the openings of the alveoli, and alveolar junctions. The connective tissue links all the alveoli to form the lung parenchyma which has a sponge-like appearance. The alveoli have interconnecting air passages in their walls known as the pores of Kohn.
Sources: en.wikipedia.org
No major medicines regulator appears to have approved AOD-9604 for human therapeutic use. It has been studied in clinical trials, but those programs did not result in a marketed drug.
It became prominent during a 2013 Australian sports investigation that examined whether it was a prohibited growth-hormone-related substance. Subsequent interpretations and list updates have varied, so current rules should be checked directly.
Published summaries generally report limited or inconsistent weight-loss effects, and complete trial data are not widely available. The studies were not sufficient to establish it as an effective obesity treatment.
Lyophilized AOD9604 is generally kept at -20 °C or colder, desiccated, and protected from light. Reconstituted solutions are usually refrigerated and handled to minimize repeated freeze-thaw cycles. These are general laboratory handling practices, not instructions for human use.