A practical reference on AOD9604: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
Reviewed 2026-02-26. Anything still debated is marked as such rather than presented as settled.
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.
The compound has been studied as a potential treatment for obesity and related metabolic conditions. Published trials have examined changes in body weight, fat mass, and safety markers over limited durations. Results have been mixed or modest, and no large-scale outcome trials are established. Regulatory agencies in several countries have not approved it as a therapeutic drug. Some commercial products have been marketed outside regulated pharmaceutical channels, which raises questions about quality and claims.
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.
| Property | Value | Notes |
|---|---|---|
| Common synonym | hGH fragment 176-191 | Refers to the C-terminal segment |
| Appearance | White to off-white powder | Typically supplied lyophilized |
| Solubility | Soluble in water and aqueous buffers | Confirm with technical data |
| Typical storage temperature | -20 °C for dry powder | Protect from moisture and light |
| Common analytical method | RP-HPLC with UV detection | Often paired with mass spectrometry |
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.
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.
Laboratory studies have reported that AOD9604 can increase lipolysis and reduce lipid accumulation in fat cells. The precise molecular target remains uncertain, and the compound does not appear to activate the growth hormone receptor in the same way as full-length hGH. Proposed mechanisms include effects on beta-adrenergic signaling and enzymes involved in fatty acid synthesis, but these pathways are not firmly established. Because most evidence comes from cell and animal models, whether the same effects occur in humans is an open question.
Clinical development of AOD9604 included trials in people with obesity, but the results did not lead to approval as a prescription medicine in major markets. Interest later shifted to research settings and to unapproved products marketed for body composition. Regulatory agencies have questioned whether the peptide qualifies as a dietary ingredient, and some have issued warnings about its presence in supplements. Long-term human safety data are limited, and questions about efficacy, dosing, and target populations remain unresolved.
AOD9604 is a synthetic peptide modeled on the C-terminal region of human growth hormone. It corresponds to a short sequence near the end of the 191-amino-acid hormone, often described as residues 176–191 or a related fragment. Researchers designed it to separate metabolic effects from the growth-promoting actions of full-length growth hormone. Early work in the 1990s explored it as a candidate for weight and lipid disorders. It is not a naturally circulating hormone fragment produced in large amounts.
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They also reported that facilities that offered these surgeries were also posting about them on TikTok. TikTok has banned the advertising of cosmetic surgeries on the platform but cosmetic surgeons are still able to reach large audiences using unpaid photo and video posts. NBC reported that videos using the hashtags '#plasticsurgery' and '#lipfiller' had amassed a combined 26 billion views on the platform. In December 2022, it was reported that a cosmetic surgery procedure known as buccal fat removal was going viral on the platform. The procedure involves surgically removing fat from the cheeks in order to give the face a slimmer and more chiseled appearance. Videos using hashtags related to buccal fat removal had collectively amassed over 180 million views. Some TikTok users criticized the trend for promoting an unobtainable beauty standard.
One notable improvement to roGFPs occurred in 2008, when the specificity of roGFP2 for glutathione was further increased by linking it to the human glutaredoxin 1 (Grx1). By expressing the Grx1-roGFP fusion sensors in the organism of interest and/or targeting the protein to a cellular compartment, it is possible to measure the glutathione redox potential in a specific cellular compartment in real-time and therefore provides major advantages compared to other invasive static methods e.g. HPLC. Given the variety of roGFPs, some effort has been made to benchmark their performance. For example, members of Javier Apfeld's group published a method in 2020 describing the 'suitable ranges' of different roGFPs, determined by how sensitive each sensor is to experimental noise in different redox conditions.
==== Resignation of Luis Barranzuela ==== Luis Barranzuela, the new Minister of the Interior, was a former police officer and the lawyer of Vladimir Cerrón until his appointment as minister. On 18 October 2021, Congress questioned the new minister over the 158 reprimands he got during his time as a police officer, and his ties to Free Peru. The parties Popular Action and Go on Country warned that they would not give confidence to the Vásquez cabinet if Luis Barranzuela wasn't removed from the cabinet. Despite pandemic restrictions established by the ministry he presided, Luis Barranzuela hosting a party for the Día de la Canción Criolla on 31 October 2021 at his home located in the district of Surco, in Lima. The party was attended by congressman Guillermo Bermejo, who upon being caught by the cameras of Latina Televisión fled the place in the van of his lawyer Ronald Atencio, who reportedly was another of the guests. Barrenzuela denied having a party and affirmed that it was only a work meeting, declaring that "Peru cannot stop". For his part, Bermejo declared that "the loud music was from an adjoining house". However, neighbors of Barranzuela declared to the local press that a party did take place, that it had started in the afternoon and that due to the discomfort of the loud music they decided to call the police. Interviewed by Perú21, a neighbor told that days before, cars on the streets around the minister's house had been removed, something unusual, which would suggest that the party had been planned.
Sarafotoxins (SRTXs) are a group of toxins present in the venom of Atractaspis engaddensis, and in clinical trials cause similar symptoms to patients diagnosed with acute giardiasis. Their etymology is from the name of the snake "שרף עין גדי" in Hebrew, pronounced "Saraf Ein Gedi" (meaning serpent of Ein Gedi). Together with endothelins (ETs), they form a homogenous family of strong vasoconstrictor isopeptides. Among them, a few slightly different substances can be named as SRTX-a, SRTX-b, SRTX-c, which were initially derived from A. engaddensis. Each one contains twenty-one amino acid residues that spontaneously fold into a defined tertiary structure, with two interchain-cysteine linkages (disulfide bonds) and a long hydrophobic tail. There are also other compounds, however, they are mostly derivations of previously mentioned ones. The main differences in the family of endothelin and sarafotoxins appear at N-terminal of peptides, as C-terminal in all of them is almost the same.
Sources: en.wikipedia.org
=== Sizing === When used in painting as a sizing, rabbit-skin glue is spread evenly over a canvas that has been placed on a stretcher. When the glue dries, the canvas tightens. The canvas should be left to dry in normal room temperature for at least 12 hours. Under no circumstances should the drying canvas be placed under harsh sunlight or other heat, because the glue will start to crack. Air humidity also affects how tight the canvas will dry. Once the canvas is dry, a second layer of glue should be spread on the canvas and left to dry again. After this, if needed, the canvas can be lightly sanded flat. Then an oil-based primer is applied. A canvas sized with rabbit-skin glue can be made tighter than with other alternatives—such as an acrylic-based gesso—because of the shrinkage. This type of canvas is also valuable because it can be sanded to a flatter texture, which allows the painter to achieve a finer level of detail than can be achieved with a typical acrylic gesso ground. A rabbit-skin glue ground is only appropriate for use under oil paint. Acrylic-based media will flake off a canvas prepared with rabbit-skin glue and are therefore not appropriate. Rabbit-skin glue is considered to be a major cause of cracking in oil paintings by most modern conservators. Because the glue is hygroscopic, it continually absorbs moisture from the atmosphere, causing the glue to swell and shrink as ambient humidity levels change. Over many humidity cycles, this repeated flexing causes the brittle oil paint to crack.
== Role in hydrocarbon generation == When animal or plant matter is buried during sedimentation, the constituent organic molecules (lipids, proteins, carbohydrates and lignin-humic compounds) break down due to the increase in temperature and pressure. This transformation occurs in the first few hundred meters of burial and results in the creation of two primary products: kerogens and bitumens. It is generally accepted that hydrocarbons are formed by the thermal alteration of these kerogens (the biogenic theory). In this way, given certain conditions (which are largely temperature-dependent) kerogens will break down to form hydrocarbons through a chemical process known as cracking, or catagenesis. A kinetic model based on experimental data can capture most of the essential transformation in diagenesis, and a mathematical model in a compacting porous medium to model the dissolution-precipitation mechanism. These models have been intensively studied and applied in real geological applications. Diagenesis has been divided, based on hydrocarbon and coal genesis into: eodiagenesis (early), mesodiagenesis (middle) and telodiagenesis (late). During the early or eodiagenesis stage shales lose pore water, little to no hydrocarbons are formed and coal varies between lignite and sub-bituminous. During mesodiagenesis, dehydration of clay minerals occurs, the main development of oil genesis occurs and high to low volatile bituminous coals are formed. During telodiagenesis, organic matter undergoes cracking and dry gas is produced; semi-anthracite coals develop.
=== Other === Some evidence indicates that plasmapheresis (therapeutic plasma exchange) can be used to treat the systemic form of scleroderma. In Italy, it is a government-approved treatment option. This is done by replacing blood plasma with a fluid consisting of albumin, and is thought to keep the disease at bay by reducing the circulation of scleroderma autoantibodies.
== Uses == Because of their amphiphilic structures, the polymers have surfactant properties that make them useful in industrial applications. Among other things, they can be used to increase the water solubility of hydrophobic, oily substances or otherwise increase the miscibility of two substances with different hydrophobicities. For this reason, these polymers are commonly used in industrial applications, cosmetics, and pharmaceuticals. They have also been evaluated for various drug delivery applications and were shown to sensitize drug-resistant cancers to chemotherapy. In bioprocess applications, poloxamers are used in cell culture media for their cell cushioning effects because their addition leads to less stressful shear conditions for cells in reactors. There are grades of poloxamers commercially available specifically for cell culture, including Kolliphor P 188 Bio. In materials science, the poloxamer P123 has recently been used in the synthesis of mesoporous materials, including SBA-15. In colloidal science, certain poloxamers such as Pluronic F-108 or Pluronic F-127, are used as steric stabilizers to prevent coalescence and/or reduce aggregation. In the case of hydrophobic colloids, the poloxamer's interior hydrophobic block is absorbed into the colloid while the two hydrophilic tails remain suspended in solution, creating a steric barrier. When mixed with water, concentrated solutions of poloxamers can form hydrogels. These gels can be extruded easily, acting as a carrier for other particles, and used for robocasting.
In a simultaneous publication, The New York Times and the Washington Post broke the story by Post reporter Alma Guillermoprieto and Times reporter Raymond Bonner about the El Mozote massacre where the army of El Salvador had carried out the mass execution of at least 811 civilians. Dr. Roberto Suazo Cordova was installed as President of Honduras, becoming the first civilian president of the Central American nation since the 1979 military coup that had brought down the previous civilian government. Died: Tran Van Huong, 79, the last President of South Vietnam for seven days (April 21–28, 1975) before the fall of Saigon, and Prime Minister 1964-1965 and 1968–1969, died at his home in Ho Chi Minh City
Sources: en.wikipedia.org
It is a synthetic peptide fragment derived from the C-terminal region of human growth hormone, commonly referred to as hGH fragment 176-191. It has been investigated for effects on fat metabolism, but it is not an approved medication in most jurisdictions.
No. It is a shortened peptide fragment, not the full hormone. It does not contain the entire hGH sequence and is studied for different proposed effects.
Regulatory approvals for weight loss are not established in major jurisdictions. Some human trials reported modest changes, but the evidence is limited, and it remains a research compound.
No major regulatory agency has approved AOD-9604 as a medicine. It is treated as an experimental peptide in research settings. Some countries restrict its sale or import.