The short version of lyophilized powder fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-07-21. Anything still debated is marked as such rather than presented as settled.
Proposed mechanisms for AOD-9604 focus on fat cells. Laboratory studies suggest the peptide can increase lipolysis, the breakdown of stored fat, and reduce lipogenesis, the formation of new fat. Unlike full human growth hormone, it does not appear to stimulate substantial IGF-1 production in the studies reported so far. Some evidence points to beta-adrenergic signaling, but the precise receptor targets and downstream pathways remain unresolved. The fragment is not thought to act through the classical growth hormone receptor.
Clinical development of AOD-9604 included trials in people with obesity. Reports from early-phase and mid-phase studies described modest or inconsistent changes in body weight. A phase IIb program did not meet its primary endpoint, and the compound was not approved for medical use. Differences in formulation, delivery route, and participant characteristics may explain some of the variation. Later investigations explored whether the peptide might have effects in other tissues, including cartilage.
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.
| Property | Value | Notes |
|---|---|---|
| Typical storage temperature | -20 °C | Lyophilized peptide; protect from moisture and light. |
| Typical analytical method | HPLC and mass spectrometry | Used to confirm identity and estimate purity. |
| Common synonyms | AOD9604; hGH 176-191 | Naming varies by supplier and publication. |
| Disulfide bonds | One | Affects folded structure and stability. |
| Typical research purity | ≥95% | Value depends on supplier and analytical method. |
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 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.
Polyurethanes contain multiple carbamate groups as part of their structure. The "urethane" in the name "polyurethane" refers to these carbamate groups; the term "urethane links" describe how carbamates polymerize. In contrast, the substance commonly called "urethane", ethyl carbamate, is neither a component of polyurethanes, nor is it used in their manufacture. Urethanes are usually formed by reaction of an alcohol with an isocyanate. Commonly, urethanes made by a non-isocyanate route are called carbamates. Polyurethane polymers have a wide range of properties and are commercially available as foams, elastomers, and solids. Typically, polyurethane polymers are made by combining diisocyanates, e.g. toluene diisocyanate, and diols, where the carbamate groups are formed by reaction of the alcohols with the isocyanates:
The resulting viral mRNA looks is identical to host mRNA, allowing endogenous cellular machinery to carry out processing and nuclear export. The de-capped host mRNAs are targeted degradation, which lead to the downregulation of cellular mRNA. Influenza RdRp also interacts with the cell Polymerase II (Pol II) C terminal domain, which potentially promotes viral transcription by changing the conformation of the RdRp. Additionally, by reducing Pol II abundance, influenza can begin to shut off critical host transcription. Cap snatching is not used during replication. Instead, the RdRp performs a "prime and realign" step ensure that the genome is fully copied. In this mechanism, the RdRp sets down a primer internally, then the vRNA is realigned to continue replication. Influenza's PB2 cap-binding domain has a unique fold, but it uses aromatic stacking to execute m7G cap-binding similar to other cap-binding proteins. PA is a member of the PD(D/E)XK nuclease family, which uses divalent metal ions to cleave nucleic acid. However, it has a peculiar active site histidine residue which ligates the Mn2+ ion used for cleavage.
This inhibition can lead to a depletion of dopamine and norepinepherine in the brain due to the lack of the precursor L-DOPA (L-3,4-dyhydroxyphenylalanine) which is synthesized by tyrosine hydroxylase. This drug is rarely used and can cause depression, but it is useful in treating pheochromocytoma and also resistant hypertension. Older examples of inhibitors mentioned in the literature include oudenone and aquayamycin.
Sources: en.wikipedia.org
=== Health === In a February 2026 livestream, part of an interview with The New York Times, Peters listed substances that were part of his daily routine, including testosterone, Accutane, retatrutide, and nebivolol. He began taking testosterone shots at 14. He also told The New York Times that he suspects he is sterile after years of injecting himself with testosterone and alluded to not necessarily enjoying the act of sex. Declaring himself infertile in the past due to testosterone injections, Peters explained: "So it's just like a negative feedback loop when you're not needing to produce testosterone anymore because your body realizes, okay, we're getting it from an outside source." Peters has stated that he is on the autism spectrum, although he has not been professionally diagnosed. He shared in a June 29, 2026, tweet that he used to stalk strangers so he could study neurotypical human behavior:
=== Availability === The "reference" version of BLOSUM is found in the NCBI toolkits. Both the older (deprecated) NCBI C Toolkit and the current NCBI C++ Toolkit provide the BLOSUM45, BLOSUM50, BLOSUM62, BLOSUM80, and BLOSUM90 matrices. Both also offer APIs for making use of the matrices. The original source code for calculating BLOSUM is also found on the NCBI website, at https://ftp.ncbi.nih.gov/repository/blocks/unix/blosum/. This archive "blosum.tar.Z" represents the original miscalculated version with improved search performance from 1992. The archive also contains pre-calculated BLOSUM outputs at the following similarity levels: "-2" (blosumn), 30, 40, 45, 50, 55, 60, 62, 65, 70, 75, 80, 85, 90, 95, and 100.
On 2 August 2015, The FA Community Shield in England was broadcast in Ultra HD by broadcast company BT Sport, becoming the first live football game shown in Ultra HD on the world's first commercial Ultra HD channel. The match was shown on Europe's first Ultra HD channel, BT Sport Ultra HD where selected live English Premier League and European Champions League matches were broadcast. Fashion One 4K launched on 2 September 2015 becoming the first global Ultra HD TV channel. Reaching nearly 370 million households across the world, the fashion, lifestyle and entertainment network broadcasts via satellite from Measat at 91.5°E (for Asia Pacific, Middle East, Australia) and from SES satellites Astra 19.2°E (for Europe), SES-3 at 103°W (for North America), NSS-806 at 47.5°W (for South America). In September 2015, Eutelsat presented new consumer research, conducted by TNS and GfK, on Ultra HD and screen sales in key TV markets. The study looked at consumer exposure to Ultra HD, perceived benefits and willingness to invest in equipment and content. GfK predicts a 200% increase in Ultra HD screen sales from June to December 2015, with sales expected to reach five million by the end of the year. GfK also forecasts that Ultra HD screens in 2020 will represent more than 70% of total sales across Europe and almost 60% in the Middle East and North Africa. On 2 September 2015, Sony unveiled the Xperia Z5 Premium; the first smartphone with a 4K display. On 9 September 2015, Apple Inc. announced that their new smartphone the iPhone 6S could record video in 4K.
Sources: en.wikipedia.org
=== As NCCIH (2014–present) === In 2014, while Josephine Briggs was the director, the NCCAM was renamed the National Center for Complementary and Integrative Health (NCCIH). Briggs retired in October 2017. On August 29, 2018, the NCCIH announced Helene Langevin as the new director. She was previously the director of the Osher Center and professor-in-residence of medicine at Harvard Medical School. Her medical interests involve connective tissue. Langevin "believes that the stretching of connective tissue is how several CAM modalities 'work,' such as chiropractic, massage, and ... acupuncture". Langevin has been studying acupuncture since the 1990s. At the time of her appointment, Gorski expressed concern that the balance of power at NCCIH would "shift back towards pseudoscience" with a massive budget to fund the shift. Under Langevin, NCCIH adopted a "whole person health" research framework, investigating how different domains of health—physiology, psychology, and environment—interconnect across the continuum between health and illness. She co-led several trans-NIH initiatives, including the NIH HEAL Initiative on opioid addiction and pain management, and the funding of a Whole Person Reference Physiome and Coordination Center co-funded by 20 NIH Institutes, Centers, and Offices. The NCCIH budget grew to approximately $170 million annually under her leadership. Langevin retired from NCCIH on November 30, 2025, returning to the University of Vermont as director of research at the Osher Center for Integrative Health.
Ansuvimab, sold under the brand name Ebanga, is a monoclonal antibody medication used for the treatment of Ebolavirus (Zaire ebolavirus) infection. The most common symptoms include fever, tachycardia (fast heart rate), diarrhea, vomiting, hypotension (low blood pressure), tachypnea (fast breathing) and chills; however, these are also common symptoms of Ebolavirus infection. Ansuvimab was approved for medical use in the United States in December 2020. It is on the World Health Organization's List of Essential Medicines. Ansuvimab is composed of a single monoclonal antibody (mAb) and was initially isolated from immortalized B-cells that were obtained from a survivor of the 1995 outbreak of Ebola virus disease in Kikwit, Democratic Republic of the Congo. In work supported by the United States National Institutes of Health and the Defense Advanced Projects Agency, the heavy and light chain sequences of ansuvimab mAb were cloned into Chinese hamster ovary cell lines and initial production runs were produced by Cook Phamica d.b.a. Catalent under contract with Medimmune.
PTC Therapeutics, Inc. is a US pharmaceutical company focused on the development of orally administered small molecule drugs and gene therapy which regulate gene expression by targeting post-transcriptional control (PTC) mechanisms in orphan diseases. In September 2009, PTC entered into an agreement with Roche for the development of orally bioavailable small molecules for central nervous system diseases. PTC acquired the Bio-e platform in 2019.
Sources: en.wikipedia.org
No. Major drug regulators have not approved AOD-9604 for weight loss or any other therapeutic indication. It remains an investigational compound studied in research settings.
The World Anti-Doping Agency classifies it as a prohibited peptide hormone. Athletes under anti-doping rules are not permitted to use it. Its presence can trigger a doping violation.
It is a fragment of growth hormone rather than a substance that signals the pituitary to release more hormone. Studies have not shown a consistent rise in IGF-1 or full growth hormone. Its metabolic effects, if any, appear separate from those of the complete hormone.
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.