This is a working overview of hGH fragment, written for readers who want more than a one-paragraph summary but less than a textbook.
Reviewed 2025-10-09. Anything still debated is marked as such rather than presented as settled.
Several names appear in scientific and commercial settings. AOD9604 and AOD-9604 are development codes used interchangeably, while hGH fragment 176-191 describes the same region. The peptide includes a disulfide bond between two cysteine residues, which helps shape its three-dimensional structure. Different suppliers may provide acetate or other salt forms, and purity can vary. These differences matter because analytical tests and biological assays can respond to the specific form being studied.
Early interest in AOD-9604 centered on whether a fragment of human growth hormone could influence fat metabolism without the broader effects of the full hormone. Cell and animal studies reported changes in fat storage and breakdown. Human trials followed, but the results were not strong enough to secure regulatory approval. The compound remains available for laboratory research, and its clinical potential is still described as uncertain. Studies continue to examine its activity and safety profile.
Commercial AOD-9604 may vary in purity, counterion content, and residual moisture. Certificates of analysis often report HPLC purity, mass confirmation, and appearance, but testing methods differ between suppliers. Independent verification is sometimes used because labeled content may not match actual peptide amount. Stability under different pH and temperature conditions is not fully standardized across studies. Researchers generally treat lyophilized material as the reference form for weighing and reconstitution. Moisture content can affect accurate mass measurement.
AOD-9604 is typically supplied as a lyophilized white to off-white powder. In this form, it is relatively stable when kept cool, dry, and protected from light. Common storage recommendations place it at −20 °C or below for long-term retention. Reconstituted solutions are less stable and are often kept at 2–8 °C for short periods. Freeze-thaw cycles should be minimized because they can promote aggregation or loss of peptide content. Vials are usually sealed under inert gas to reduce oxidation.
| Property | Value | Notes |
|---|---|---|
| Common name | AOD-9604 | Development code used in scientific literature. |
| Chemical class | Synthetic peptide | Fragment of human growth hormone. |
| Amino acid length | 16 residues | Matches hGH region 176-191. |
| Appearance | White to off-white powder | Typical lyophilized peptide solid. |
| Solubility | Soluble in water | Dissolves in aqueous media; exact behavior depends on salt form. |
In the scientific literature, AOD-9604 appears in reviews of growth hormone fragments and in discussions of peptide-based metabolic research. Some sources distinguish it from growth hormone itself, while others group it with compounds marketed for weight management. The evidence base is small compared with approved obesity medications. Questions about long-term efficacy and clinical relevance remain open, and independent replication of key findings is limited. Most published reports are early-stage and exploratory.
AOD-9604 is a synthetic peptide modeled on the C-terminal region of human growth hormone. It is often described as hGH fragment 176-191. Research interest arose because it was designed to isolate possible effects on fat metabolism from other actions of growth hormone. It is not a full growth hormone molecule. Its development history includes early laboratory and animal studies followed by human trials. The peptide has been examined in laboratory, animal, and limited 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.
Detection and characterization of AOD-9604 in research and anti-doping settings typically rely on mass spectrometry coupled with liquid chromatography. These methods can identify the peptide by its mass and fragmentation pattern. Immunoassays may also be used in some screening contexts, but they can cross-react with related peptides. Because the molecule is small and may be present at low concentrations, sample preparation and method validation are important. Confirmatory analysis usually requires comparison with a certified reference standard.
In laboratory settings, AOD-9604 is commonly supplied as a lyophilized powder and stored cold to limit degradation. Reconstituted solutions are typically kept refrigerated or frozen, depending on the buffer and concentration, and protected from repeated freeze-thaw cycles. Stability can be influenced by pH, temperature, and the presence of proteases. Purity is usually assessed by high-performance liquid chromatography and mass spectrometry. These practices support reproducibility, but they do not imply safety or efficacy for any human use.
Regulatory status: AOD-9604 is not approved as a therapeutic drug in the United States, European Union, or other major markets. It is listed by the World Anti-Doping Agency as a prohibited substance in sport, specifically under growth hormone fragments. Many jurisdictions restrict its sale for human consumption. Products marketed online may not meet pharmaceutical quality standards. The legal status varies by country and often depends on whether the material is presented as a research chemical, supplement, or drug.
=== Health === In 1996, Morgan was diagnosed with diabetes mellitus and for years has been an alcoholic. Morgan has conceded that many of his own troubles were incorporated within 30 Rock episodes. In early December 2010, Morgan received a kidney transplant necessitated by his diabetes and alcohol use. In August 2023, Morgan responded to a comment about his healthy appearance during an episode of Today with Hoda & Jenna by disclosing that he was using semaglutide. In March 2024, he told Jimmy Fallon that he had "learned to out-eat Ozempic" and "gained 40 lbs," but later clarified that he was joking, saying "Ozempic did great by me and I was glad to use it." On March 17, 2025, while sitting courtside at an NBA basketball game at Madison Square Garden between the New York Knicks and Miami Heat, Morgan experienced an episode of food poisoning, which caused him to vomit onto the basketball court sideline and suffer a bloody nose. He joked on his Instagram post from the hospital saying, "More importantly, the Knicks are now 1-0 when I throw up on the court so maybe I'll have to break it out again in the playoffs."
=== Historic and laboratory routes === Fumaric acid was first prepared from succinic acid. A traditional synthesis involves oxidation of furfural (from the processing of maize) using chlorate in the presence of a vanadium-based catalyst.
==== Supralingual ==== Supralingual administration is achieved by placing the drug above the tongue. It is often the route of administration of choice when one would like the drug to bypass or alleviate the first pass effect on the drug after oral delivery.
== List of people with the surname == Andy Merrifield (born 1960), British Marxist urban theorist Charles T. Merrifield (c. 1924–1957), American uranium miner and murder victim Charles Watkins Merrifield (1827–1884), British mathematician Dave Merrifield (born 1941), Canadian ice hockey player Donald Merrifield (1928–2010), American Jesuit Eric Mowbray Merrifield, South African engineer, inventor of the dolos Flora Merrifield (1859–1943), British suffragist Frankie Merrifield (born 1994), English footballer Frederick Merrifield (1831–1924), English lepidopterist John H. Merrifield (1847–1906), American politician Lane Merrifield, Canadian entrepreneur, co-creator of Club Penguin Leonard Stanford Merrifield (1880–1943), British sculptor Lester Levern Merrifield (1921–2000), American orthodontist Louisa May Merrifield (1906–1953), British poisoner Mary Philadelphia Merrifield (1804–1889), British algologist and writer Michael Merrifield (born 1946/47), American politician Michael Merrifield, English astronomer and professor Ralph Merrifield (1913–1995), English museum curator and archaeologist Renee Merrifield, Canadian politician Rob Merrifield (born 1953), Canadian politician and diplomat Robert Bruce Merrifield (1921–2006), American biochemist, inventor of solid phase peptide synthesis Samuel Merrifield (1904–1982), Australian politician Webster Merrifield (1852–1916), American educator and academic Whit Merrifield (born 1989), American baseball player William Merrifield (1890–1943), Canadian Victoria Cross recipient
A major target of poaching is the totoaba in the Gulf of California, due to its perceived similarity to the traditional high-grade swim bladder of Bahaba taipingensis. The totoaba, a critically endangered species, is protected by CITES. Poachers use gillnets to capture the totoaba, and often remove the valuable bladder and toss the dead fish into the sea to minimize evidence. Poaching operations were backed by a transnational organized crime ring known by the moniker 'the Dragon Cartel' (Spanish: Cártel del Dragón): a cooperation between Chinese organized crime and Mexican cartels, particularly the Sinaloa cartel, operating in Mexicali, Baja California. Mexican cartels poached totoaba maw (Spanish: buches) and smuggled them through local restaurateurs to international ports like Vancouver, and traded them with Chinese criminals for the chemical precursors to fentanyl. As of 2021, a single totoaba maw sold for US$3-5,000 equivalent in Mexico, US$10-15,000 in the US, and US$60,000 in China. For its high price and involvement with drug trafficking, totoaba maw has been given the media moniker "cocaine of the sea". In 2019, internal documents of the Secretariat of Environment and Natural Resources (SEMARNAT) of Mexico claimed that the government has minimally investigated cartel activity. SEMARNAT's prosecution branch PROFEPA opened 42 investigations into totoaba poaching between 2012 and 2021, resulting in two arrests.
Sources: en.wikipedia.org
== Further reading == Bernard, MA; Valli, VE (1977). "Familial renal disease in Samoyed dogs". The Canadian Veterinary Journal. 18 (7): 181–9. PMC 1697612. PMID 884645. Meyers, VN; Jezyk, PF; Aguirre, GD; Patterson, DF (1983). "Short-limbed dwarfism and ocular defects in the Samoyed dog". Journal of the American Veterinary Medical Association. 183 (9): 975–9. doi:10.2460/javma.1983.183.09.975. PMID 12002589. S2CID 32585084. Kimmel, SE; Ward, CR; Henthorn, PS; Hess, RS (2002). "Familial insulin-dependent diabetes mellitus in Samoyed dogs". Journal of the American Animal Hospital Association. 38 (3): 235–8. doi:10.5326/0380235. PMID 12022409.
== Pathophysiology == Overproduction of collagen is thought to result from an autoimmune dysfunction, in which the immune system starts to attack the kinetochore of the chromosomes. This would lead to genetic malfunction of nearby genes. T cells accumulate in the skin; these are thought to secrete cytokines and other proteins that stimulate collagen deposition. Stimulation of the fibroblast, in particular, seems to be crucial to the disease process, and studies have converged on the potential factors that produce this effect.
=== Molecular mimicry === Some infectious agents, like Campylobacter jejuni, bear antigens that resemble, but are not identical to, the body's self-molecules. This phenomenon, known as molecular mimicry, can lead to cross-reactivity, where the immune response to such infections inadvertently results in the production of antibodies that also react with self-antigens. An example of this is Guillain–Barré syndrome, in which antibodies generated in response to a C. jejuni infection also react with the gangliosides in the myelin sheath of peripheral nerve axons.
Radon-222 (222Rn, Rn-222, historically also radium emanation) is the most stable isotope of radon, with a half-life of 3.82146 days. It is an intermediate in the decay chain of primordial uranium-238 and is the immediate decay product of radium-226. Radon-222 was first observed in 1899, and was identified as an isotope of a new element several years later. In 1957, the name radon, formerly the name of only radon-222, became the name of the element. Owing to its gaseous nature and high radioactivity, radon-222 is one of the leading causes of lung cancer.
ATC code A Alimentary tract and metabolism is a section of the Anatomical Therapeutic Chemical Classification System, a system of alphanumeric codes developed by the World Health Organization (WHO) for the classification of drugs and other medical products. Codes for veterinary use (ATCvet codes) can be created by placing the letter Q in front of the human ATC code: for example, QA. National versions of the ATC classification may include additional codes not present in this list, which follows the WHO version.
Sources: en.wikipedia.org
Former Yemeni president Ali Abdullah Saleh had accused the Houthis of having ties to external backers, in particular the Iranian government; Saleh stated in an interview with The New York Times,The real reason they received unofficial support from Iran was because they repeat same slogan that is raised by Iran – death to America, death to Israel. We have another source for such accusations. The Iranian media repeats statements of support for these [Houthi] elements. They are all trying to take revenge against the USA on Yemeni territories. Such backing has been reported by diplomatic correspondents of major news outlets (e.g., Patrick Wintour of The Guardian), and has been the reported perspective of Yemeni governmental leaders militarily and politically opposing Houthi efforts (e.g., as of 2017, the UN-recognized, deposed Yemeni President Abd Rabbu Mansour Hadi, who referred to the "Houthi rebels... as 'Iranian militias'". The Houthis in turn accused the Saleh government of being backed by Saudi Arabia and of using Al-Qaeda to repress them. Under the next President Hadi, Gulf Arab states accused Iran of backing the Houthis financially and militarily, though Iran denied this, and they were themselves backers of President Hadi. Despite confirming statements by Iranian and Yemeni officials in regards to Iranian support in the form of trainers, weaponry, and money, the Houthis denied reception of substantial financial or arm support from Iran.
Some surgeons utilize 100 micrometres between each section, and some utilize 200 micrometres between the first two sections, and 100 micrometres between subsequent sections (10 crank of tissue set at 6 to 10 micrometre is roughly equal to 100 micrometres if one allows for physical compression due to the blade).
RNA-eIF4E complexes are never observed in PML bodies consistent with the observation that PML suppresses the m7G cap binding function of eIF4E. Structural studies show that a related arenavirus RING finger protein, Lassa Fever Z protein, can similarly bind eIF4E on the dorsal surface. eIF4E nuclear entry is mediated by its direct interactions with Importin 8 where Importin 8 associates with the m7G cap-binding site of eIF4E. Indeed, reduction in Importin 8 levels reduce the oncogenic potential of eIF4E overexpressing cells and its RNA export function. Importin 8 binds to the cap-binding site of eIF4E and is competed by excess m7G cap analogues as observed by NMR. eIF4E also stimulates the RNA export of Importin 8 RNA thereby producing more Importin 8 protein. There may be additional importins that play this role depending on cell type. Although an initial study suggested that the eIF4E transporter protein 4E-T (eIF4ENIF1) facilitated nuclear entry, later studies showed that this factor rather alters the localization of eIF4E to cytoplasmic processing bodies (P-bodies) and repress translation. Potyvirus viral protein genome linked (VPg) were found to directly bind eIF4E in its cap-binding site. VPg is covalently linked to its genomic RNA and this interaction allows VPg to act as a "cap." The potyvirus VPg has no sequence or structural homology to other VPg's such as those from poliovirus.
KPV tripeptide (Lys-Pro-Val) is a tripeptide derivative that is derived from the C-terminal fragment of alpha-MSH. It has antiinflammatory effects, and is used in skincare products, as well as having been researched for other potential medical applications.
== Target == DkTx is a specific TRPV1 receptor agonist and acts as a bivalent ligand, which gives it high affinity to its target. The TRPV1 channel is a member of the group of TRP ion channels, which are all known to be responsible for sensory signaling, such as mechanosensation, thermoception, and nociception. TRPV1 itself is a nonselective cation channel located in the plasma membrane of nociceptive dorsal root ganglions. It can be activated in several ways, such as by noxious heat, capsaicin, extracellular proteins, and other inflammatory agents. However, binding locations can differ, e.g., capsaicin does not bind to the outer pore region but to the S3-S4 region of the channel. The potency of this toxin binding to the TRPV1 channel, as quantified with the half maximal effective concentration (EC50) of DkTx is 0.23 μM. Owing to its bivalent structure, this potency is much higher compared to single K1 and K2 motifs or other vanillotoxins binding to the TRPV1 channel. Vanillotoxins (VaTx, or Vanilloids) are toxins that are TRPV1 agonists that target the channel on its outer pore region. For this reason, DkTx is considered a vanillotoxin. Different from the reversible interaction of the other three VaTx toxins (VaTx1, VaTx2 and VaTx3), binding of DkTx is irreversible and inflicts persistent TRPV1 channel activity.
Sources: en.wikipedia.org
AOD-9604 is a synthetic peptide fragment of human growth hormone. It corresponds to the C-terminal region known as hGH 176-191 and is studied for metabolic effects. It is not an approved therapeutic drug.
No. It contains only a small portion of the human growth hormone sequence. The full hormone has 191 amino acids and many additional actions that the fragment does not share.
The name refers to the amino acid positions in the human growth hormone chain. The fragment spans residues 176 through 191 at the C-terminal end. This naming convention helps distinguish it from full-length hGH.
Lyophilized powder is commonly stored at −20 °C or below, protected from light and moisture. Reconstituted solutions are typically kept refrigerated and used within a limited period.