LC-MS/MS raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
This page was last updated on 2026-04-01 and is reviewed periodically as new material appears.
The peptide is frequently described as a growth hormone fragment, although it is chemically distinct from full-length hGH. AOD-9604 contains 16 amino acids and includes two cysteine residues that can form an intramolecular disulfide bond. In solution, this structural feature can influence folding, aggregation, and stability. Published descriptions sometimes call it hGH 176-191 or AOD9604, with spacing and capitalization varying. Such naming differences can complicate literature searches, database entries, and product verification.
Researchers have studied the fragment in cell and animal models to understand its metabolic actions. Some experiments report effects on fat breakdown and fat storage pathways, but the underlying mechanism remains incompletely defined. AOD-9604 does not appear to stimulate the same broad growth hormone receptor signaling as full-length hGH. Whether its observed activities arise from direct receptor interactions or downstream metabolic changes is an open question. Results from different assays are not always consistent.
Regulatory interest in AOD-9604 increased after high-profile anti-doping cases involving peptide products. In some cases, the substance was supplied under alternative names or in compounded preparations, complicating traceability. Sports tribunals and anti-doping panels have discussed whether the peptide was explicitly banned at the time of use, leading to clarifications by the World Anti-Doping Agency. For consumers and researchers, the legal status can vary by jurisdiction, and products marketed as research chemicals may lack independent quality verification.
AOD-9604 is listed as a prohibited substance in sport by the World Anti-Doping Agency. It falls under the peptide hormones, growth factors, related substances, and mimetics class on the prohibited list. Anti-doping organizations treat its presence in an athlete's sample as an adverse finding unless a therapeutic use exemption applies. The prohibition reflects concerns about performance enhancement in competitive settings and the difficulty of distinguishing exogenous peptide use from endogenous hormone fragments.
Detection of AOD-9604 in biological samples relies on analytical techniques capable of distinguishing a small synthetic peptide from related endogenous sequences. Liquid chromatography coupled with tandem mass spectrometry is commonly used for confirmatory analysis. Sample preparation may involve immunoaffinity enrichment or solid-phase extraction to concentrate the peptide. Because the molecule is small and may be present at low concentrations, assay sensitivity and specificity are ongoing analytical challenges. Laboratories also validate methods against reference materials when available.
| Property | Value | Notes |
|---|---|---|
| Molecular class | Synthetic peptide | Derived from a fragment of human growth hormone |
| Sequence basis | hGH residues 176-191 | Commonly described as a 16-amino-acid fragment |
| Appearance | White to off-white powder | Typical for lyophilized research peptides |
| Solubility | Soluble in water or aqueous buffer | Exact solubility depends on pH and purity |
| Common synonyms | AOD9604; hGH 176-191 | Spelling and punctuation vary across sources |
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 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.
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.
AOD-9604 has been investigated primarily as a potential treatment for obesity and related metabolic conditions. Early laboratory work examined its effects on fat cells, and later studies moved into animal models and human clinical trials. Some trials reportedly reached Phase II, but the program did not lead to an approved medicine. Published summaries often note that weight-loss results were modest or inconsistent. The full trial data are not all publicly available in detail.
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.
8 January – ITV1 broadcasts a 95-minute interview with Prince Harry ahead of the release of his memoirs, Spare. 10 January The UK government publishes the Strikes (Minimum Service Levels) Bill 2023, designed to require public sector organisations to provide a minimum service when their unions vote to strike. Prince Harry's controversial memoir Spare is released, becoming "the fastest selling non-fiction book of all time" on the date of its release. 11 January – Andrew Bridgen has the whip suspended by the Conservative Party after he spread misinformation about COVID-19 and compared vaccination to the Holocaust. 12 January – Heavy rain and strong winds cause floods and travel disruption in parts of the UK, with over 60 flood warnings issued in England, 19 in Wales and 2 in Scotland. 13 January Figures indicate the UK economy unexpectedly grew by 0.1% in November 2022, potentially avoiding a long recession. Medical experts criticise the BBC for an interview with Aseem Malhotra who claims that mRNA vaccines may have been responsible for thousands of excess deaths. Manchester City footballer Benjamin Mendy is cleared on six counts of rape and one count of sexual assault against four young women, but faces a retrial on two counts the jury could not reach verdicts on. COVID-19 in the UK: The latest Office for National Statistics data indicates COVID-19 cases were falling in England and Wales in the week up to 30 December 2022, with cases continuing to increase in Scotland; the picture was unclear for Northern Ireland.
Selectivity of a cyclodextrin phase is dependent on two key factors namely the size and structure of the analyte since it is based on a simple fit-unfit geometric criteria. An aromatic ring or cycloalkyl ring should be attached near the stereogenic center of the analyte. Substituents at or near the analyte chiral center must be able to interact with the hydroxyl groups at the entrance of the CD cavity through H-bonding. α-Cyclodextrin holds small aromatic molecules, whereas β-cyclodextrin incorporates both naphthyl groups and substituted phenyl groups. The aqueous compatibility of CD and its unique molecular structure make the CD- bonded phase highly suitable for use in chiral HPLC analysis of drugs. One further benefit of CD is that they are generally less expensive than the other CSPs. Some of the major shortcomings of CD CSPs is that it is limited to compounds that can enter into CD cavity, minor structural changes in analyte leads to unpredictable effect on resolution, often poor efficiency and cannot invert elution order.
The hydrolysis that elastases bring about occur in several steps, starting with the formation of a complex between elastase and its substrate, with the carbonyl carbon positioned near the nucleophilic serine, followed by a nucleophillic attack that forms an acyl-enzyme intermediate (a pair of electrons from the double bond of the carbonyl oxygen moves to the oxygen) while the first product is released. The intermediate is then hydrolyzed in a deacylation step, regenerating the active enzyme and resulting in the release of the second product ( the electron-deficient carbonyl carbon re-forms the double bond with the oxygen and the C-terminus of the peptide is released. It preferentially cleaves peptide bonds at the carbonyl end of amino acid residues with small hydrophobic side chains such as glycine, valine, leucine, isoleucine and alanine. The wide specificity of elastases for non-aromatic uncharged side chains can explain its ability to break down native elastin.
Arthur 'Blaine' Bowman (born 1946 in Ogden, Utah, USA) is a leading proponent of ion chromatography, who has served variously as chairman, president, chief executive officer, and director of Dionex Corporation, a manufacturer of analytical instruments. Bowman received the 2015 Pittcon Heritage Award in recognition of his contributions to the field of ion chromatography.
There may be flocculation in some gels, which may produce an unstable gel. The rheology of some gels are easily altered by environmental factors such as temperature and humidity, resulting in stricter storage requirements. Syneresis of the gel may occur during storage, causing the gel to shrink unpredictably or even dry out. The gelators may precipitate and salt out, and some drugs may degrade in gel formulation due to the other ingredients present in the formulation. Some additives and gelators added into the formulation may cause irritation problems, such as skin irritation, dermatitis or allergic conditions. The increased water content in gels increases the chances of bacterial or fungal attack, which may contaminate the gel, making it unsuitable for use. Considering the direct route of administration, drugs must be very small in size to have an effective plasma concentration for action. The particle size and other properties of the drug may also affect its absorption through the skin barrier, resulting in an unreliable effect.
Sources: en.wikipedia.org
A capillary is a small blood vessel, from 5 to 10 micrometres in diameter, and is part of the microcirculation system. Capillaries are microvessels and the smallest blood vessels in the body. They are composed of only the tunica intima (the innermost layer of an artery or vein), consisting of a thin wall of simple squamous endothelial cells. They are the site of the exchange of many substances from the surrounding interstitial fluid, and they convey blood from the smallest branches of the arteries (arterioles) to those of the veins (venules). Other substances which cross capillaries include water, oxygen, carbon dioxide, urea, glucose, uric acid, lactic acid and creatinine. Lymph capillaries connect with larger lymph vessels to drain lymphatic fluid collected in microcirculation.
where subscripts p and n stand for the proton and neutron, and g(l)n = 0. By using the same identities as here and using the value g(l)p = 1, one gets the following result, in units of the nuclear magneton μN
== History == JWD InfoLogistics started its business with home and office moving services under the name of JVK International Movers Company Limited in 1979. The company later expanded its portfolio of business into the logistics and supply chain industry and converted into a public company and listed in the Stock Exchange of Thailand on September 29, 2015. JWD Group decided to cooperate with Flash Group and Thailand Post to launch the Cold Chain Express named Fuze Post on September 1, 2021. In 2023, JWD InfoLogistics merged with SCG Logistics Management Co.,Ltd (SCGL) and was renamed SCGJWD Logistics Public Company Limited SCGJWD operates in 9 ASEAN countries plus China and has over 2,400 corporate customers.
Soybean meal is a high protein source for fish and has become a substitute for traditionally used marine animal meals. Spirulina is a blue-green Cyanobacteria rich in raw protein, vitamins A, B1, B2, B6, B12, C and E, beta-carotene, color enhancing pigments, a whole range of minerals, essential fatty acids and eight amino acids required for complete nutrition. Whole wheat (carbohydrates) is not the best source of energy in fish but is an excellent source of roughage for fish such as Goldfish and Koi. It is also a natural source of vitamin E which promotes growth and enhances coloration.
Justicia pectoralis Brugmansia sp. (Toé) Opuntia sp. Epiphyllum sp. Cyperus sp. Nicotiana rustica (Mapacho, variety of tobacco) Ilex guayusa, a relative of yerba mate Lygodium venustum, (Tchai del monte) Phrygilanthus eugenioides and Clusia sp (both called Miya) Lomariopsis japurensis (Shoka) Common admixtures with their associated ceremonial values and spirits:
Sources: en.wikipedia.org
No, it is a synthetic peptide fragment corresponding to a small portion of hGH. It is not the full 191-amino-acid hormone and does not reproduce all of hGH's effects.
It is commonly described as a 16-amino-acid peptide based on residues 176-191 of human growth hormone. Some sources vary in notation, so checking the stated sequence is useful.
It is not typically described as a standalone natural hormone. The sequence is derived from the C-terminal region of human growth hormone, but the synthetic peptide is a laboratory-made construct.
Yes, the World Anti-Doping Agency classifies AOD-9604 as a prohibited peptide hormone and related substance. Its use by athletes is banned under the relevant anti-doping code.