If you have been reading about AOD-9604 and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.
Updated 2026-03-07. Numbers and descriptions here follow the published literature rather than marketing material.
Quality varies among research-grade suppliers, so certificates of analysis and independent testing are important for verification. A typical certificate reports purity by HPLC, identity by mass spectrometry, appearance, and sometimes residual solvents or water content. AOD9604 is often sold as a research chemical not intended for human consumption, and labels can be inaccurate. Common misconceptions include treating the peptide as a form of growth hormone, assuming supplement status, or expecting approved-drug quality from unregulated products.
AOD9604 is commonly supplied as a white to off-white lyophilized powder. The powder is typically stored at -20 °C or below, protected from light and moisture, because peptides can degrade through oxidation, hydrolysis, or aggregation. If it is reconstituted for laboratory use, an appropriate aqueous buffer or solvent is chosen, and the solution is kept cold and handled to avoid repeated freeze-thaw cycles. These practices support stability but do not imply suitability for human use.
Identity and purity are usually assessed with reversed-phase high-performance liquid chromatography and mass spectrometry. Reversed-phase HPLC separates the peptide from related impurities and can estimate purity by ultraviolet absorbance, while mass spectrometry confirms the molecular mass and detects modifications. Peptide mapping, amino acid analysis, and disulfide mapping may be used when the sequence or disulfide arrangement must be verified. Because AOD9604 contains cysteine residues, oxidation and disulfide isomers are possible quality concerns in synthetic batches.
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 |
|---|---|---|
| Appearance | White to off-white powder | Lyophilized form; visual inspection |
| Solubility | Soluble in water and aqueous buffers | Depends on pH, purity, and counterion |
| Typical storage | -20 °C or below, desiccated | Protect from light; avoid repeated freeze-thaw after reconstitution |
| Common analytical method | Reversed-phase HPLC and mass spectrometry | Purity by HPLC; identity and mass by LC-MS or MALDI-TOF |
| Common synonyms | hGH fragment 176–191; AOD-9604 | Names vary in research and product labeling |
Stability of AOD-9604 depends on storage conditions. Lyophilized powder is generally more stable than reconstituted solution. Recommended storage is typically at -20°C or lower, protected from light and moisture. Repeated freeze-thaw cycles can cause aggregation or degradation. In solution, the peptide may be susceptible to hydrolysis or oxidation, so aliquoting and cold storage are common practices. Researchers often add stabilizers such as mannitol or trehalose during lyophilization to improve shelf life.
Quality control for AOD-9604 involves verifying identity, purity, and concentration. Suppliers may provide a certificate of analysis listing HPLC purity and mass spectrometry data. Independent verification is advised because peptide products can vary in quality. Researchers should check for counterions, residual solvents, and microbial contamination. Proper documentation supports reproducibility and safety in laboratory studies. When sourcing, institutions often require third-party testing and detailed chain-of-custody records. These steps help ensure that experimental results are attributable to the peptide rather than impurities.
Analytical characterization of AOD-9604 typically employs reversed-phase high-performance liquid chromatography (RP-HPLC) to assess purity and identity. Mass spectrometry provides confirmation of molecular mass, while amino acid analysis can verify composition. These methods are standard for peptide research chemicals. Because the peptide lacks a distinct chromophore, detection often relies on ultraviolet absorbance at 214 nm or mass spectrometric response. Laboratories may also use capillary electrophoresis for separation. For example, size-exclusion chromatography can detect aggregates.
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.
AOD-9604 is a synthetic peptide modeled on the C-terminal region of human growth hormone. It corresponds to residues 176-191 of the 191-amino-acid hGH sequence. The fragment is not the full hormone and lacks the receptor-binding region associated with growth and metabolic effects of hGH. Researchers developed it to isolate a specific portion of hGH for study. Its exact sequence and length are often stated in peptide catalogs and patents.
The number of subunits in an oligomeric complex is described using names that end in -mer (Greek for "part, subunit"). Formal and Greco-Latinate names are generally used for the first ten types and can be used for up to twenty subunits, whereas higher order complexes are usually described by the number of subunits, followed by -meric.
models the transition rate from the compartment of susceptible individuals to the compartment of infectious individuals, so that it is called the force of infection. However, for large classes of communicable diseases it is more realistic to consider a force of infection that does not depend on the absolute number of infectious subjects, but on their fraction (with respect to the total constant population
=== Rejuva === Rejuva is an adeno-associated virus (AAV)-based gene therapy platform to enable the pancreas to produce GLP-1 on an ongoing basis as a treatment for obesity and type 2 diabetes. The therapy targets dysfunctional beta islet cells in the pancreas. Delivery is done with a needle catheter to deliver viral vectors into the pancreas. In January 2025, Rejuva completed Clinical Trial Application-enabling preclinical in vivo studies, beginning its first-in-human studies in the first half of 2025.
== Other uses == Caldwell 8 (NGC 559), an open cluster in Cassiopeia Celestron, 8-inch (200 mm) a Schmidt-Cassegrain telescope C8 carbine, an assault rifle used by Canada and other NATO forces made by Diemaco/Colt Canada C8 Unemployment Indemnity (Shipwreck) Convention, 1920 Elbrus-8C, a Russian 28 Nanometre 8 core microprocessor An international standard paper size (57×81 mm), defined in ISO 216
== Reaction similarity == Similarity between enzymatic reactions (EC) can be calculated by using bond changes, reaction centres or substructure metrics (EC-BLAST Archived 30 May 2019 at the Wayback Machine).
Sources: en.wikipedia.org
=== Science and technology === In classical Greece, Aristotle (384–322 BC) commented on their colour-changing abilities, both for camouflage and for signalling, in his Historia animalium: "The octopus ... seeks its prey by so changing its colour as to render it like the colour of the stones adjacent to it; it does so also when alarmed." Aristotle noted that the octopus had a hectocotyl arm and suggested it might be used in reproduction. This claim was widely ignored until the 19th century. It was described in 1829 by the French zoologist Georges Cuvier, who supposed it to be a parasitic worm, naming it as a new species, Hectocotylus octopodis. Other zoologists thought it a spermatophore; the German zoologist Heinrich Müller believed it was "designed" to detach during copulation. In 1856, the Danish zoologist Japetus Steenstrup demonstrated that it is used to transfer sperm, and only rarely detaches.
Harrison's Principles of Internal Medicine is an American textbook of internal medicine. First published in 1950, it is in its 22nd edition (published in 2025 by McGraw-Hill Professional) and comes in two volumes. Although it is aimed at all members of the medical profession, it is mainly used by internists and junior doctors in this field, as well as medical students. It is widely regarded as one of the most authoritative books on internal medicine and has been described as the "most recognized book in all of medicine." The work is named after Tinsley R. Harrison of Birmingham, Alabama, who served as editor-in-chief of the first five editions and established the format of the work: a strong basis of clinical medicine interwoven with an understanding of pathophysiology.
Official website About Hooters – the Atlanta-based chain's information page Original Hooters – the Clearwater-based founders sub-chain Transfer of "Hooters" brand from Clearwater to Atlanta, a March 2001 article from Atlanta Business Chronicle Sexual Harassment Retaliation Lawsuit, from The Smoking Gun Fortune magazine feature on Hooters Hooters All Set to Open in Phuket Thailand
=== Civilian === Although the majority of the world's submarines are military, there are some civilian submarines, which are used for tourism, exploration, oil and gas platform inspections, and pipeline surveys. Some are also used in illegal activities. The Submarine Voyage ride opened at Disneyland in 1959, but although it ran under water, it was not a true submarine, as it ran on tracks and was open to the atmosphere. The first tourist submarine was Auguste Piccard, which went into service in 1964 at Expo64. By 1997, there were 45 tourist submarines operating around the world. Submarines with a crush depth in the range of 400–500 feet (120–150 m) are operated in several areas worldwide, typically with bottom depths around 100 to 120 feet (30 to 37 m), with a carrying capacity of 50 to 100 passengers. In a typical operation a surface vessel carries passengers to an offshore operating area and loads them into the submarine. The submarine then visits underwater points of interest such as natural or artificial reef structures. To surface safely without danger of collision the location of the submarine is marked with an air release and movement to the surface is coordinated by an observer in a support craft. A recent development is the deployment of so-called narco-submarines by South American drug smugglers to evade law enforcement detection. Although they occasionally deploy true submarines, most are self-propelled semi-submersibles, where a portion of the craft remains above water at all times.
Sources: en.wikipedia.org
Proper nutrition is important after delivery to help the mother recover, and to provide enough food energy and nutrients for a woman to breastfeed her child. Women having serum ferritin less than 70 μg/L may need iron supplements to prevent iron deficiency anaemia during pregnancy and postpartum. During lactation, water intake may need to be increased. Human milk is made of 88% water, and the IOM recommends that breastfeeding women increase their water intake by about 300 mL/day to a total volume of 3000 mL/day (from food and drink), approximately 2,400 mL/day from fluids. Fetal alcohol spectrum disorder Prenatal nutrition Smoking and pregnancy "Nutrition During Pregnancy Resource List for Consumers" (PDF). USDA NAL Food and Nutrition Information Center. Archived from the original (PDF) on 2007-07-14. Retrieved 2007-10-17. Health Education Authority (1996) Folic acid - what all women should know (leaflet) London:HEA
Take breast cancer as an example. The sensitivity of traditional ultrasound screening for breast cancer can be 76%. While with the blood-based mRNA diagnostic method, the sensitivity could be 80.6%. mRNA-based disease diagnostic technologies allow quantitive measurement of mRNA in the certain samples, such as leukemia As some technologies such as RNA-seq can provide the entire transcriptome of individual, the mRNA-based disease diagnosis can be developed in the landscape of personalized medicine. In HER-2 breast cancer, detection of ERBB2 mRNA expression levels is helpful in predicting response to anti-HER2-based treatments. As mentioned above, the mRNA-based disease diagnostic technology is more sensitive and specific to certain diseases. Even though there is no obvious symptom, the mRNA-based disease diagnostic technology can serve as screening method for early changes in RNA levels. High serum metadherin mRNA expression was observed in colorectal cancer and associated with poorly differentiated histological grades
It is a bioactive sphingoid which derives from the sphinganine. It is formed by a sphingoid and an amino alcohol and it constitutes the conjugated base of 1-deoxymethylsphinganine (1+). Its role is accepting a hydron from a donor via its organic amino compound; it is a Brønsted base. It is also known as deoxymethyl-SA, (2R)-1-aminoheptadecan-2-ol and 1-desoxymethylsphinganine. The molecular weight of this compound is 271,48 g/mol and its molecular formula is C17H37NO, which means it has 17 carbons. In relation to its appearance, it has a powder form. Other physical and chemical properties are not certainly known.
== Use in healthcare == Medical researchers have studied the use of virtual reality games in healthcare. For example, meta-analyses have demonstrated that virtual reality games could be used for stress management or to improve cognitive and physical functions among elderly post-stroke patients.
The study found an overall 1.4 fold increase in risk of cardiovascular ischemic events relative to the control arms. The results were heterogenous, with clear evidence of increased risk relative to placebo but not relative to other diabetes treatments and higher risk associated with combinations of rosiglitazone with insulin or metformin. Based on the 1.4 fold increased risk relative to control groups, FDA scientist David Graham presented an analysis suggesting that rosiglitazone had caused 83,000 excess heart attacks between 1999 and 2007. The advisory panel voted 20 : 3 that the evidence available indicated that rosiglitazone increased the risk of cardiovascular events and 22 : 1 that the overall risk:benefit ratio of rosiglitazone justified its continued marketing in the United States. The FDA placed restrictions on the drug, including adding a boxed warning about heart attacks, but did not withdraw it. In 2000 a study to address the concerns regarding cardiovascular safety was requested by the European Medicines Agency (EMA). GSK agreed to perform post-marketing a long-term cardiovascular morbidity/mortality study in patients on rosiglitazone in combination with a sulfonylurea or metformin: the RECORD study. The results as published in 2009 showed that rosiglitazone was non-inferior to treatment with metformin or a sulfonylurea with respect to the rate of cardiovascular events and cardiovascular death. European regulators concluded that due in part to design limitations, the results neither proved nor eliminated concerns of excess cardiovascular risk.
Sources: en.wikipedia.org
Lyophilized AOD9604 is generally kept at -20 °C or colder, desiccated, and protected from light. Reconstituted solutions are usually refrigerated and handled to minimize repeated freeze-thaw cycles. These are general laboratory handling practices, not instructions for human use.
Mass spectrometry, such as LC-MS or MALDI-TOF, confirms the molecular mass and can reveal sequence-related impurities. Reversed-phase HPLC is used for purity, and peptide mapping or amino acid analysis can support sequence identity. No single method establishes every quality attribute.
No. AOD9604 is a short synthetic fragment of the hGH sequence, not the full 191-amino-acid hormone. It lacks the regions that mediate hGH receptor activation and growth-promoting effects. Products labeled as AOD9604 should not be assumed to have the same properties as hGH.
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.