anti-doping is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Last reviewed on 2026-07-09. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
AOD-9604 is a synthetic peptide whose structure corresponds to a C-terminal segment of human growth hormone. It is often described as hGH fragment 176-191, a 16-amino-acid sequence. The peptide was designed to isolate a region of hGH associated with fat metabolism while avoiding the full hormone's growth-promoting actions. Laboratory and commercial materials typically present it as a lyophilized powder for research use. Its identity is defined by amino acid sequence, not by a single brand.
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.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Molecular class | Synthetic peptide | Based on the C-terminal region of human growth hormone. |
| Amino acid length | 16 residues | Often described as hGH fragment 176-191. |
| Appearance | Lyophilized powder | Typically white to off-white; exact appearance depends on grade. |
| Solubility | Soluble in water | Aqueous solubility depends on pH, ionic strength, and preparation. |
| Typical storage | -20 °C or lower | Lyophilized peptide is usually kept cold and dry; solutions may require freezing. |
. If we assume that each possible chain conformation has an equal statistical weight, it can be shown that the probability P(r) of a polymer chain in the population to have distance r between the ends will obey a characteristic distribution described by the formula
== Application == GPC is often used to determine the relative molecular weight of polymer samples as well as the distribution of molecular weights. What GPC truly measures is the molecular volume and shape function as defined by the intrinsic viscosity. If comparable standards are used, this relative data can be used to determine molecular weights within ± 5% accuracy. Polystyrene standards with dispersities of less than 1.2 are typically used to calibrate the GPC. Unfortunately, polystyrene tends to be a very linear polymer and therefore as a standard it is only useful to compare it to other polymers that are known to be linear and of relatively the same size.
In addition to its possible use in the treatment of bacterial infections, penicillin is certainly useful to the bacteriologist for its power of inhibiting unwanted microbes in bacterial cultures so that penicillin-insensitive bacteria can readily be isolated. A notable instance of this is the very easy isolation of Pfeiffer's bacillus of influenza when penicillin is used ... It is suggested that it may be an efficient antiseptic for application to, or injection into, areas infected with penicillin-sensitive microbes. G. E. Breen, a fellow member of the Chelsea Arts Club, once asked Fleming if he thought it would ever be possible to make practical use of penicillin. Fleming gazed vacantly for a moment and then replied, "I don't know. It's too unstable. It will have to be purified, and I can't do that by myself." In 1941, the British Medical Journal reported that
=== Isotope labeling measuring techniques === Any technique in measuring the difference between isotopomers can be used. The two primary methods, nuclear magnetic resonance (NMR) and mass spectrometry (MS), have been developed for measuring mass isotopomers in stable isotope labeling. Proton NMR was the first technique used for 13C-labeling experiments. Using this method, each single protonated carbon position inside a particular metabolite pool can be observed separately from the other positions. This allows the percentage of isotopomers labeled at that specific position to be known. The limit to proton NMR is that if there are n carbon atoms in a metabolite, there can only be at most n different positional enrichment values, which is only a small fraction of the total isotopomer information. Although the use of proton NMR labeling is limiting, pure proton NMR experiments are much easier to evaluate than experiments with more isotopomer information. In addition to Proton NMR, using 13C NMR techniques will allow a more detailed view of the distribution of the isotopomers. A labeled carbon atom will produce different hyperfine splitting signals depending on the labeling state of its direct neighbors in the molecule. A singlet peak emerges if the neighboring carbon atoms are not labeled. A doublet peak emerges if only one neighboring carbon atom is labeled. The size of the doublet split depends on the functional group of the neighboring carbon atom.
Sources: en.wikipedia.org
=== Thermal === Fluorinated polymers like PTFE and PVDF are especially thermally stable due to strong carbon-fluorine (C–F) bonds, the strongest in organic chemistry, which contribute to the durability of these materials under heat. PVDF is semi-crystalline, giving it a balance of rigidity and flexibility across temperatures from −35 °C to 160 °C. Above 316 °C, PVDF decomposes via dehydrofluorination, which can lead to structural changes, including double bonds and potential discoloration from thermal decomposition.
For services to Association Football and to Gender Equality. Rajwinder Singh. Principal Project Sponsor, Prison Infrastructure Team, Ministry of Justice. For Public Service. Dr. Sabesan Sithamparanathan, FREng. Founder and President, PervasID and Enterprise Fellow, Girton College, University of Cambridge. For services to Innovation Technology. David Alexander Smith. Departmental Records Officer and Chief Librarian, Department for Levelling Up, Housing and Communities. For services to Government Knowledge and Information Management. Marie Smith. Senior Officer, National Crime Agency. For services to Law Enforcement. Michelle Southern. Founder and Director, Street Paws. For services to Homeless People and their Pets. David Martin Sprackling. Lately Lawyer, Parliamentary Counsel, Office of the Parliamentary Counsel. For Public Service. Nicholas Stace. Chair, The Conduit Holding Company. For services to Consumers and to the Environment. Marc Howard Steene. Founder and Director, Outside In Art. For services to Art. Gavin Paul Stollar. Honorary Chair, Liberal Democrat Friends of Israel. For political service to the Jewish Community. Luigi Strinati. Delivery Director, HM Courts and Tribunals Service Wales. For Public Service. Lorraine Pfavayi Sunduza. Lately Chief Nurse, East London NHS Foundation Trust. For services to Mental and Community Health. Joanna Kathryn Swash. Group Chief Executive Officer, Moneypenny. For services to the Economy. Claire Louise Swift. Director of Social Responsibility, Making for Change. For services to the Rehabilitation of Prisoners.
=== Qualitative analysis === Qualitative approach examines all the available detrital zircons individually regardless of their abundance among all grains. This approach is usually conducted with high precision thermal ionization mass spectrometry (TIMS) and sometimes secondary ion mass spectrometry (SIMS). Optical examination and classification of detrital zircon grains are commonly included in qualitative studies through back-scatter electrons (BSE) or cathodoluminescence (CL) imagery, despite the relationship between the age and optical classification of detrital zircon grains is not always reliable.
These variables (S, I, and R) represent the number of people in each compartment at a particular time. To represent that the number of susceptible, infectious, and removed individuals may vary over time (even if the total population size remains constant), we make the precise numbers a function of t (time): S(t), I(t), and R(t). For a specific disease in a specific population, these functions may be worked out in order to predict possible outbreaks and bring them under control. Note that in the SIR model,
==== Prophecies and statements ==== In 2013, Bakker wrote Time Has Come: How to Prepare Now for Epic Events Ahead about end-time events. Bakker has changed his views on prosperity theology. In his 1980 book Eight Keys to Success, he stated, "God wants you to be happy, God wants you to be rich, God wants you to prosper." In his 1996 book, I Was Wrong, he admitted that the first time he actually read the Bible all the way through was in prison. Bakker also wrote that he realized that he had taken passages out of context and used them as prooftexts to support his prosperity theology. Bakker's revived show features a number of ministers who bill themselves as "prophets". He now says that "PTL" stands for "Prophets Talking Loud". In an October 2017 video, Bakker said that "God will punish those" who ridicule him; he has said that Hurricane Harvey was a judgment of God, and he blamed Hurricane Matthew on then-President Barack Obama. Bakker predicted that if then-President Donald Trump was impeached, Christians would begin a Second American Civil War. He compared the 2017 Washington train derailment to the sinking of the RMS Titanic and stated the Amtrak train derailment was a warning from God. He also claimed that he predicted the September 11 attacks of 2001, stating that he "saw 9/11 in 1999 before New Year's Eve" and that there would "be terrorism" and bombings in New York City and Washington, D.C. A few days after the Stoneman Douglas High School shooting, he stated that "God came to [him] in a dream...
Sources: en.wikipedia.org
It is a synthetic peptide based on a C-terminal fragment of human growth hormone. It is commonly referred to as hGH fragment 176-191 and is studied for metabolic effects rather than growth effects.
No. It represents only a short portion of the hGH sequence and lacks the full hormone's structure. As a result, its biological activity and regulatory status differ from those of prescription hGH.
The exact peptide is not typically described as a circulating hormone; it is a synthetic construct based on a natural sequence. Fragments of hGH can exist in laboratory or metabolic contexts, but AOD-9604 itself is manufactured for research.
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.