This is a working overview of synthetic peptide, written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2026-03-08 and is reviewed periodically as new material appears.
AOD-9604 is a synthetic peptide whose sequence is modeled on the C-terminal region of human growth hormone. Published descriptions commonly place it as a modified fragment corresponding to hGH amino acids 176–191, with a tyrosine residue added or retained at the N-terminus to support detection and handling. It is not intact growth hormone and lacks the full receptor-binding architecture of the parent protein. The molecule was developed as a research candidate for metabolic studies rather than as a replacement for growth hormone therapy. Its identity is defined by its amino acid sequence rather than by any single commercial preparation.
AOD-9604 drew attention in the 1990s and 2000s as a potential anti-obesity agent. Early work explored both injectable and oral routes, which is unusual for a peptide of this size. Animal studies reported changes in fat metabolism without the growth-promoting or insulin-like effects associated with full-length growth hormone. Subsequent human trials produced mixed or modest results, and the compound did not obtain regulatory approval for weight management in major markets. It remains known mainly through research literature, sports anti-doping listings, and non-approved supplement advertising.
AOD-9604 is a synthetic peptide whose sequence matches the C-terminal fragment of human growth hormone, specifically residues 176 through 191. This region differs from the full hormone in its receptor interactions. The peptide is not a growth hormone secretagogue and does not bind the growth hormone receptor in the same manner. Researchers have examined it for effects on lipid metabolism, but its exact pharmacological profile remains an active area of study.
Development of AOD-9604 began in the 1990s as scientists sought to isolate metabolic effects of growth hormone without its growth-promoting actions. Early laboratory work focused on fat cells and animal models. Several human trials followed, examining changes in body composition and fat mass. Results have been mixed, and the peptide has not progressed to widespread clinical approval. Interest continues in research settings, particularly regarding its mechanism and potential metabolic targets.
Regulatory status varies by country. In the United States, AOD-9604 is not approved as a prescription drug. It is sometimes sold as a research chemical or dietary supplement, though such marketing may fall outside legal frameworks. The World Anti-Doping Agency prohibits its use in sport. Researchers must obtain it through legitimate suppliers and follow institutional rules. Its legal classification continues to evolve as authorities increasingly assess peptide products more broadly.
| Property | Value | Notes |
|---|---|---|
| Molecular class | Synthetic peptide | Fragment analog of human growth hormone |
| Sequence basis | hGH 176–191 region | Modified C-terminal fragment |
| Common synonyms | AOD-9604; AOD9604; hGH fragment | Research and trade names vary |
| Regulatory status | Not approved as a drug | Prohibited in competitive sport |
| Research code | AOD9604 | Used in scientific and patent literature |
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2008–09 - Michael "Michi" Mueller - Puma Ocean Racing 2011–12 - David "Dave" Swete - Team Sanya 2014–15 - Sophie Ciszek - Team SCA 2017–18 - Bleddyn Mon - Turn the Tide on Plastic 2023–23 - Will Harris - Team Malizia
=== Defence arguments === Letby's defence argued that she was a dedicated nurse working within a system that had failed, and that the prosecution's case relied on assumptions of deliberate harm combined with her presence during certain incidents. They contended that shortcomings in staffing and care on the neonatal unit were extensive and could not reasonably be attributed to a single individual. The defence also suggested that "extraordinary bleeding" in one infant might have been caused by medical equipment rather than deliberate injury. Counsel for the defence maintained that the prosecution had not presented sufficient evidence to support its theories of how the infants were harmed. They argued that the evidence for air embolism was too weak to sustain the allegation and noted that the term did not appear in Letby's internet search history. No independent medical experts were called by the defence. The only defence witness other than Letby was a plumber who testified that the unit had recurring plumbing problems, including sewage backing up into sinks, which he said required frequent call‑outs. The defence suggested that such hygiene issues could have contributed to the unit's elevated mortality rate. In later reporting, Dewi Evans acknowledged that pseudomonas had been detected in the unit's water supply, leading to several cases of pneumonia.
Sources: en.wikipedia.org
== Solution concentration and purification == After leaching, the leach liquor must normally undergo concentration of the metal ions that are to be recovered. Additionally, undesirable metal ions sometimes require removal.
The chain's image has also made it popular in some unusual ways. For example, In-N-Out is still considered acceptable in some areas with strong opposition to corporate food restaurants, such as McDonald's. Commercial leaders in San Francisco's Fisherman's Wharf district said they opposed every other fast-food chain except In-N-Out because they wanted to maintain the flavor of family-owned, decades-old businesses in the area, with one saying locals would ordinarily "be up in arms about a fast-food operation coming to Fisherman's Wharf," but "this is different." California native and Colorado Rockies player Jason Giambi would often visit In-N-Out Burger when on the West Coast with his former team, the New York Yankees. He said he tried to open an In-N-Out Burger restaurant in New York but was unsuccessful.The chain also has fans in a number of renowned chefs including Gordon Ramsay, Thomas Keller, Julia Child, Anthony Bourdain, Ina Garten, and Mario Batali. Famous London chef and restaurateur Ramsay ate In-N-Out for the first time when taping Hell's Kitchen in Los Angeles, and it soon became one of his favorite spots for take-out. Ramsay was quoted, saying about the experience: "In-N-Out burgers were extraordinary. I was so bad, I sat in the restaurant, had my double cheeseburger then minutes later I drove back round and got the same thing again to take away." Thomas Keller, a fan of In-N-Out, celebrated with In-N-Out burgers at the anniversary party of his restaurant, The French Laundry.
== SW == sw – (s) Swahili language (ISO 639-1 code) SW (s) South-West ordinal direction Sweden (FIPS 10-4 country code) (a) Shortwave Star Wars swa – (s) Swahili language (ISO 639-2 code) SWA (i/a) Secure Web Access South-West Asia SWAC – (p) Southwestern Athletic Conference SWAG Scientific wild-ass guess, slang for a rough estimate based on expert experience Sourceware Archive Group, a free collection of classified source code and sample programs written in Pascal Sport Writers Association of Ghana, Sports Writers Association based in Ghana Special Warfare Group, a former name used by the Naval Special Operations Command "Supporters Without A Game", sport slang spun off from WAGs ("wives and girlfriends") SWALK – (a) Sealed With A Loving Kiss SWAN – (a) System for Wearable Audio Navigation SWAP – (a) Surface Waters Acidification Programme SWAPO – (a) South-West Africa People's Organisation SWAT – (a) Special Weapons And Tactics swe – (s) Swedish language (ISO 639-2 code) SWE – (s) Sweden (ISO 3166 trigram) SWF (p) Shockwave Flash file ("swiff") Single White Female SWG (i) Surface Warfare Group Symbology Working Group SWHR – (i) Society for Women's Health Research SWIG – (a) Simplified Wrapper and Interface Generator SWIR – (a/i) Short Wave InfraRed ("ss-why-are" or "swhirr") SWLABR – (i) "She Was Like A Bearded Rainbow", a song by the band Cream SWORD – (p) Subjective WORkload Dominance SWORDS – (a) Special Weapons Observation Reconnaissance Detection System SWOT – (a) Strengths, Weaknesses, Opportunities, Threats (mnemonic) SWP (i) Special Working Party ("swipp") Systematic Westing Plan (a plan of periodic westing of shares or mutual funds worth a fixed amount of money) Skill with prize (UK pub quiz machines — quality titles include: Pub Quiz, Quiz City, Frog in a Liquidizer, Who Wants To Win a Tenner?) SWT – (i) Sea Water Tank SWV – (i) Sisters With Voices (American female R&B vocal group) SWZ – (s) Swaziland (ISO 3166 trigram)
Hyperforin is a phytochemical produced by some of the members of the plant genus Hypericum, notably Hypericum perforatum (St John's wort). Hyperforin may be involved in the pharmacological effects of St. John's wort, specifically in its antidepressant effects. Meta-analyses of clinical trials suggest that H. perforatum is as effective as SSRIs for treating mild to moderate depression and is better tolerated, although findings are limited by short study durations. Hyperforin is found in significant amounts only in H. perforatum, where it accumulates as a probable plant defense compound, with modern carbon dioxide extraction methods used to isolate it from mixtures containing related compounds like adhyperforin.
Sources: en.wikipedia.org
No. It is a synthetic peptide fragment modeled on part of human growth hormone, not the full hormone. It does not contain the complete sequence or receptor-binding regions of hGH.
It was investigated in clinical trials for obesity, but it did not receive approval for that use in major markets. Results were generally modest or mixed, and it remains an experimental compound.
WADA lists it as a prohibited peptide hormone. Its use can be detected by laboratory methods, and athletes are subject to sanctions if it is found in samples.
AOD-9604 is a synthetic peptide fragment of human growth hormone, corresponding to amino acids 176-191. It is studied for potential effects on fat metabolism, but it is not approved as a drug in most countries. Its exact mechanism remains under investigation.