AOD-9604 comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Updated 2026-01-27. Numbers and descriptions here follow the published literature rather than marketing material.
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.
AOD-9604 is prohibited in sport by the World Anti-Doping Agency under the peptide hormone class. Its presence in a sample can be detected through mass spectrometry-based methods, although the exact assay depends on the laboratory. In research settings, material is often supplied as a lyophilized powder for reconstitution. Buyers and researchers should note that products labeled AOD-9604 may vary in purity and actual peptide content. Analytical certificates and independent testing are common ways to verify identity, but no global harmonized standard exists for all commercial lots.
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.
| Property | Value | Notes |
|---|---|---|
| Molecular class | Peptide fragment | Corresponds to hGH residues 176-191 |
| Common synonyms | AOD9604, hGH 176-191 | Also written as AOD-9604 |
| Typical form | Lyophilized powder | Often supplied in sealed vials |
| Solubility | Water-soluble | Dissolves in aqueous buffers |
| Regulatory status | Not approved as drug | Banned in sport; varies by country |
== Damage mechanisms == Glycated hemoglobin causes an increase of highly reactive free radicals inside blood cells, altering the properties of their cell membranes. This leads to blood cell aggregation and increased blood viscosity, which results in impaired blood flow. Another way glycated hemoglobin causes damage is via inflammation, which results in atherosclerotic plaque (atheroma) formation. Free-radical build-up promotes the excitation of Fe2+-hemoglobin through Fe3+-Hb into abnormal ferryl hemoglobin (Fe4+-Hb). Fe4+ is unstable and reacts with specific amino acids in hemoglobin to regain its Fe3+ oxidation state. Hemoglobin molecules clump together via cross-linking reactions, and these hemoglobin clumps (multimers) promote cell damage and the release of Fe4+-hemoglobin into the matrix of innermost layers (subendothelium) of arteries and veins. This results in increased permeability of interior surface (endothelium) of blood vessels and production of pro-inflammatory monocyte adhesion proteins, which promote macrophage accumulation in blood vessel surfaces, ultimately leading to harmful plaques in these vessels. Highly glycated Hb-AGEs go through vascular smooth muscle layer and inactivate acetylcholine-induced endothelium-dependent relaxation, possibly through binding to nitric oxide (NO), preventing its normal function. NO is a potent vasodilator and also inhibits the formation of plaque-promoting LDLs (sometimes called "bad cholesterol") oxidized form. This overall degradation of blood cells also releases heme from them.
=== SICRIT imaging === The Soft Ionization by Chemical Reaction in Transfer (SICRIT) source can be coupled with imaging techniques such as Atmospheric pressure (AP)-MALDI or laser ablation. In AP-MALDI + SICRIT configurations, SICRIT serves as an ambient-pressure post-ionization unit, increasing ion yield and extending molecular coverage, particularly for small metabolites and lipids. When combined with laser ablation, SICRIT enables soft ionization of ablated neutrals without matrix application, maintaining high spatial resolution down to ~1 μm. Recent studies demonstrate that coupling laser desorption with plasma-based SICRIT ionization improves ionization efficiency and signal stability under atmospheric conditions. The technique offers compatibility with various mass spectrometers and minimal sample preparation. Limitations include dependence on ablation parameters and limited coverage of large biomolecules. SICRIT imaging is an emerging approach promising enhanced molecular coverage and flexible ambient-MSI workflows.
== Further reading == Sitruk-Ware R, Bricaire C, De Lignieres B, Yaneva H, Mauvais-Jarvis P (October 1987). "Oral micronized progesterone. Bioavailability pharmacokinetics, pharmacological and therapeutic implications--a review". Contraception. 36 (4): 373–402. doi:10.1016/0010-7824(87)90088-6. PMID 3327648. Simon JA (December 1995). "Micronized progesterone: vaginal and oral uses". Clinical Obstetrics and Gynecology. 38 (4): 902–14. doi:10.1097/00003081-199538040-00024. PMID 8616985. Ruan X, Mueck AO (November 2014). "Systemic progesterone therapy--oral, vaginal, injections and even transdermal?". Maturitas. 79 (3): 248–55. doi:10.1016/j.maturitas.2014.07.009. PMID 25113944.
Karate at the 2020 Summer Olympics: American karateka Ariel Torres wins a bronze medal in the men's kata event, winning the first United States medal in karate. 2021 California fire season: The Dixie Fire near Chico becomes the largest fire in the history of California. August 8 Volleyball at the 2020 Summer Olympics – Women's tournament: The United States defeats the two time reigning Olympic Champions Brazil. Becoming the first to win Gold in Tokyo. August 9 COVID-19 pandemic COVID-19 vaccination Secretary of Defense Lloyd Austin announces that all service members will be required to get vaccinated by mid September. The CDC announces that 60% of Americans have received their first dose of the COVID-19 vaccine. August 10 New York Governor Andrew Cuomo announces he will resign effective August 24 after an inquiry found he sexually harassed multiple women. The Senate votes 69–30 to pass the Infrastructure Investment and Jobs Act, a $1.2 trillion bipartisan infrastructure bill. Dominion Voting Systems sues conservative news channels One America News Network and Newsmax, plus former Overstock.com CEO Patrick M. Byrne, claiming they promoted false conspiracy theories about them after the 2020 presidential election. August 11 Aubrey de Grey, a leading anti-aging researcher and Chief Science Officer of the SENS Research Foundation, is placed on leave by his company, following sexual harassment allegations by two women in the field. The Senate votes to pass a $3.5 trillion reconciliation package, a day after the bipartisan infrastructure package passed.
During the separation, the mobile phase composition may stay the same, or change. If it stays the same, the process is termed isocratic (meaning constant composition). The word was coined by Csaba Horvath who was one of the pioneers of HPLC. If it changes, then the process is termed a gradient elution. For example, a gradient can start at 10% methanol in water, and end at 90% methanol in water after 20 minutes. The two components of the mobile phase are typically termed "A" and "B"; A is the "weak" solvent which allows the solute to elute only slowly, while B is the "strong" solvent which rapidly elutes the solutes from the column. In reversed-phase chromatography, solvent A is often water or an aqueous buffer, while B is an organic solvent miscible with water, such as acetonitrile, methanol, THF, or isopropanol. In isocratic elution, peak width increases with retention time linearly according to the equation for N, the number of theoretical plates. This can be a major disadvantage when analyzing a sample that contains analytes with a wide range of retention factors. Using a weaker mobile phase, the runtime is lengthened and results in slowly eluting peaks to be broad, leading to reduced sensitivity. A stronger mobile phase would improve issues of runtime and broadening of later peaks but results in diminished peak separation, especially for quickly eluting analytes which may have insufficient time to fully resolve. This issue is addressed through the changing mobile phase composition of gradient elution.
Sources: en.wikipedia.org
=== Bifurcated and over-coordinated hydrogen bonds in water === A single hydrogen atom can participate in two hydrogen bonds. This type of bonding is called "bifurcated" (split in two or "two-forked"). It can exist, for instance, in complex organic molecules. It has been suggested that a bifurcated hydrogen atom is an essential step in water reorientation. Acceptor-type hydrogen bonds (terminating on an oxygen's lone pairs) are more likely to form bifurcation (it is called overcoordinated oxygen, OCO) than are donor-type hydrogen bonds, beginning on the same oxygen atom's hydrogen atoms.
Compounds eluting off the column are carried into a hydrogen fueled flame which excites specific elements in the molecules, and the excited elements (P,S, Halogens, Some Metals) emit light of specific characteristic wavelengths. The emitted light is filtered and detected by a photomultiplier tube. In particular, phosphorus emission is around 510–536 nm and sulfur emission is at 394 nm. With an atomic emission detector (AED), a sample eluting from a column enters a chamber which is energized by microwaves that induce a plasma. The plasma causes the analyte sample to decompose and certain elements generate an atomic emission spectra. The atomic emission spectra is diffracted by a diffraction grating and detected by a series of photomultiplier tubes or photo diodes. Electron capture detector (ECD) uses a radioactive beta particle (electron) source to measure the degree of electron capture. ECD are used for the detection of molecules containing electronegative / withdrawing elements and functional groups like halogens, carbonyl, nitriles, nitro groups, and organometalics. In this type of detector either nitrogen or 5% methane in argon is used as the mobile phase carrier gas. The carrier gas passes between two electrodes placed at the end of the column, and adjacent to the cathode (negative electrode) resides a radioactive foil such as 63Ni. The radioactive foil emits a beta particle (electron) which collides with and ionizes the carrier gas to generate more ions resulting in a current.
In the version often prepared in the United States today in restaurants and hotels, it consists of strips of beef filet with a mushroom, onion, and sour cream sauce, and is served over rice or noodles. Today, the dish is generally served over wide or twisted egg noodles in the United States.
=== Weight-loss and diabetes drug litigation === In August 2023, one of the first lawsuits was filed alleging that Novo Nordisk's Ozempic (semaglutide) and Eli Lilly's Mounjaro caused severe gastrointestinal side effects, including gastroparesis. The lawsuit was brought on behalf of Jaclyn Bjorklund, a Louisiana woman represented by Morgan & Morgan, who alleged that she experienced persistent vomiting and other serious injuries after using both drugs and that the manufacturers failed adequately to warn patients and physicians about the associated risks. In February 2024, the U.S. Judicial Panel on Multidistrict Litigation ordered that more than 50 lawsuits involving Ozempic and Mounjaro be centralised in the Eastern District of Pennsylvania. Court filings showed that Morgan & Morgan had filed multiple cases and sought consolidation of the litigation. Following the consolidation, the court appointed a plaintiffs' leadership committee to coordinate the litigation, which also included attorneys from the law firms Susen Law Group, Motley Rice, Levin Papantonio, Pogust Goodhead, and Johnson Becker.
Eclipse Phase Second Edition role-playing game references the Dyson tree as an example of a Biological Habitat. In the Tenchi Muyo! OVA series, the Jurai utilize trees that can live in space as ships, and in the temple of the goddess-like character Tokimi, a giant tree whose roots encompass a planet can be seen. In The Dirty Pair series, the episode "Run From the Future" is set on the Nimkasi habitat, an outlaw habitat that is a Dyson tree. The video game Eufloria is based on the Dyson tree concept.
Sources: en.wikipedia.org
== Distribution == The chain catshark is found in the Northwest Atlantic, Gulf of Mexico and Caribbean, ranging from George's Bank in Massachusetts, to Nicaragua and Barbados. In the Mid-Atlantic Bight, the chain catshark is found along the outer continental shelf and upper slope. The shark occupies depths of 36 to 750 meters (118–2,461 ft); in the northern part of its range it is mainly found between 36 and 230 meters (118–755 ft) and in the southern areas generally deeper than 460 meters (1,510 ft). Due to the shark's depth distribution, it has been suggested that the shark does not perform large-scale migrations. Temperature is thought to limit the shark's distribution in northern areas, particularly during the winter. Although bands of warm water at the edge of the shelf have been observed, the temperature varies seasonally, thus limiting this non-migratory species. In general, the chain catshark is found in waters with a temperature between 8.5 °C (47 °F) and 14 °C (57 °F).
Much of the early work leading up to the discovery of the ubiquitin proteasome system occurred in the late 1970s and early 1980s at the Technion in the laboratory of Avram Hershko, where Aaron Ciechanover worked as a graduate student. Hershko's year-long sabbatical in the laboratory of Irwin Rose at the Fox Chase Cancer Center provided key conceptual insights, though Rose later downplayed his role in the discovery. The three shared the 2004 Nobel Prize in Chemistry for their work in discovering this system. Although electron microscopy (EM) data revealing the stacked-ring structure of the proteasome became available in the mid-1980s, the first structure of the proteasome core particle was not solved by X-ray crystallography until 1994. Groundbreaking work on cryo-EM by Wolfgang Baumeister's group revealed the overall architecture of the 26S proteasome and enabled biochemical experiments to provide a general mechanism for ubiquitin dependent degradation. In 2018, the first structure of the yeast 26S proteasome followed by the first atomic structures of the human 26S proteasome holoenzyme in complex with a polyubiquitylated protein substrate were solved by cryogenic electron microscopy, confirming the mechanisms by which the substrate is recognized, deubiquitylated, unfolded and degraded by the 26S proteasome.
Only once, when she was 13, did she make an extended visit to her parents, then living in Khartoum, the capital of Sudan, where her father was Principal of Gordon College. When she was 14, her distant cousin, the chemist Charles Harington (later Sir Charles), recommended D. S. Parsons' Fundamentals of Biochemistry. Resuming the pre-war pattern, her parents lived and worked abroad for part of the year, returning to England and their children for several months every summer. In 1926, on his retirement from the Sudan Civil Service, her father took the post of Director of the British School of Archaeology in Jerusalem, where he and her mother remained until 1935. In 1928, Hodgkin joined her parents at the archaeological site of Jerash, in present-day Jordan, where she documented the patterns of mosaics from multiple Byzantine-era Churches dated to the 5th–6th centuries. She spent more than a year finishing the drawings as she started her studies in Oxford, while also conducting chemical analyses of glass tesserae from the same site. Her attention to detail through the creation of precise scale drawings of these mosaics mirrors her subsequent work in recognising and documenting patterns in chemistry. Hodgkin enjoyed the experience of field archaeology so much that she considered giving up chemistry in favour of archaeology. Her drawings are archived by Yale University. Hodgkin developed a passion for chemistry from a young age, and her mother, a proficient botanist, fostered her interest in the sciences. On her 16th birthday her mother gave her a book by W. H.
=== Centrazbat '97 === In September 1997, the 82nd traveled to Kazakhstan and Uzbekistan for CENTRAZBAT '97. Paratroopers from Ft. Bragg, NC flew 8,000 miles on US Air Force C-17s and jumped into an airfield in Shimkent, Kazakhstan. Forty soldiers from the three republics joined 500 paratroopers on the exercise-opening jump. Marine Gen. John Sheehan, then-commander in chief of the Atlantic Command, was first out of the aircraft. The 82nd joined units from Kyrgyzstan, Turkey, and Russia in the two-week-long NATO training mission. Members of the international press and local reporters from WRAL-TV and the Fayetteville Observer were embedded with the 82nd Airborne.
Sources: en.wikipedia.org
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.
No, it is a small fragment of the full growth hormone protein. It does not appear to stimulate growth or increase growth hormone levels in the same way. Its actions are thought to be more limited to metabolic pathways.
Regulatory status varies. It is not approved for medical use in the United States or many other countries. It is banned in sport by WADA, and its sale as a supplement or research chemical may be subject to legal restrictions.
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.