If you have been reading about synthetic peptide 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.
Last reviewed on 2025-10-07. Where a claim depends on a specific study, the study is described rather than over-claimed.
AOD-9604 is a synthetic peptide that corresponds to a short section of human growth hormone. It is commonly identified as hGH fragment 176-191 because its sequence matches residues at the C-terminal end of the hormone. The molecule contains sixteen amino acids and is made by solid-phase peptide synthesis. Researchers study it for metabolic effects rather than for the growth-promoting actions associated with full human growth hormone. Its small size distinguishes it from the complete 191-amino-acid hormone.
Several names appear in scientific and commercial settings. AOD9604 and AOD-9604 are development codes used interchangeably, while hGH fragment 176-191 describes the same region. The peptide includes a disulfide bond between two cysteine residues, which helps shape its three-dimensional structure. Different suppliers may provide acetate or other salt forms, and purity can vary. These differences matter because analytical tests and biological assays can respond to the specific form being studied.
Early interest in AOD-9604 centered on whether a fragment of human growth hormone could influence fat metabolism without the broader effects of the full hormone. Cell and animal studies reported changes in fat storage and breakdown. Human trials followed, but the results were not strong enough to secure regulatory approval. The compound remains available for laboratory research, and its clinical potential is still described as uncertain. Studies continue to examine its activity and safety profile.
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 |
|---|---|---|
| Common name | AOD-9604 | Development code used in scientific literature. |
| Chemical class | Synthetic peptide | Fragment of human growth hormone. |
| Amino acid length | 16 residues | Matches hGH region 176-191. |
| Appearance | White to off-white powder | Typical lyophilized peptide solid. |
| Solubility | Soluble in water | Dissolves in aqueous media; exact behavior depends on salt form. |
Development of AOD-9604 began in the 1990s as scientists sought to isolate metabolic effects of growth hormone without its growth-promoting actions. Early laboratory work focused on fat cells and animal models. Several human trials followed, examining changes in body composition and fat mass. Results have been mixed, and the peptide has not progressed to widespread clinical approval. Interest continues in research settings, particularly regarding its mechanism and potential metabolic targets.
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.
Proposed mechanism focuses on lipolysis, the breakdown of stored triglycerides into free fatty acids and glycerol. AOD-9604 is thought to act on adipose tissue without stimulating appetite or affecting blood sugar in the same way as growth hormone. Laboratory studies report increased fat oxidation in some models. The precise receptor interactions and signaling pathways remain incompletely characterized. Researchers have proposed that the peptide may influence fat mobilization through pathways distinct from the full hormone.
Research has examined whether the peptide affects fat mass independently of growth hormone's other actions. Early animal studies suggested reductions in body fat, but species differences and small sample sizes limit interpretation. Human studies have generally been short and have not consistently shown large effects. Some trials measured body composition, lipid profiles, and safety parameters, but the overall picture is one of suggestive yet inconclusive metabolic activity. Findings vary across study populations and protocols.
A central uncertainty is whether observed metabolic changes translate into meaningful clinical benefits. Study designs vary in dose, duration, and participant characteristics, making comparisons difficult. Independent replication is limited, and the field lacks consensus on optimal endpoints or treatment duration. Ongoing or future studies may clarify mechanism and effect size, but current evidence does not establish a clear therapeutic role. Researchers often call for larger, longer, and better-controlled trials, while questions remain about which patient groups might respond.
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 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.
=== Identifying Translated mRNA Regions === By using specific drugs, ribosome profiling can identify initiating regions of mRNA, elongating regions, and areas of translation stalling. Initiating regions can be detected by adding harringtonine or lactidomycin to prevent any further initiation. This allows the starting codon of the mRNAs throughout the cell lysate to be analyzed, which has been used to determine non-AUG sequences that do initiate translation. The other elongating regions can be detected by adding antibiotics like cycloheximide that inhibit translocation, chloramphenicol that inhibits transfer of peptides within the ribosome, or non-drug means like thermal freezing. These elongation freezing methods allow for the kinetics of translation to be analyzed. Since multiple ribosomes can translate a single mRNA molecule to speed up the translation process, RiboSeq demonstrates the protein coding regions within the mRNA and how quickly this is done depending on the mRNA being sequenced. This also allows for ribosome profiling to show pause sites within the transcriptome at specific codons. These sites of slow or paused translation are demonstrated by an increase in ribosome density and these pauses can link specific proteins with their roles within the cell.
=== Terpolymers === Terpolymers of PVDF are the most promising one in terms of electromechanically induced strain. The most commonly used PVDF-based terpolymers are P(VDF-TrFE-CTFE) and P(VDF-TrFE-CFE). This relaxor-based ferroelectric terpolymer is produced by random incorporation of the bulky third monomer (chlorotrifluoroethylene, CTFE) into the polymer chain of P(VDF-TrFE) copolymer (which is ferroelectric in nature). This random incorporation of CTFE in P(VDF-TrFE) copolymer disrupts the long-range ordering of the ferroelectric polar phase, resulting in the formation of nano-polar domains. When an electric field is applied, the disordered nano-polar domains change their conformation to all-trans conformation, which leads to large electrostrictive strain and a high room-temperature dielectric constant of ~50.
=== Cancer === A 2020 study found that ADAM10 enhances the proliferation, migration, and invasion of osteosarcoma cells by modulating the E-cadherin/β-catenin signaling pathway, with miR-122-5p identified as a regulatory upstream target of ADAM10, suggesting that the miR-122-5p/ADAM10 axis may represent a potential therapeutic target for osteosarcoma.
Sources: en.wikipedia.org
Scorched rice, known as hyeonmi cha in Korea Skullcap Shallot peel tea from Kalimantan Serendib (tea), tea from Sri Lanka Sobacha Spicebush (Lindera benzoin) leaves used to make a tea by some native peoples of eastern North America Spruce tea, made from needles of spruce trees Staghorn sumac, fruit can be made into a lemonade Stevia, can be used to make herbal tea, or as a sweetener in other beverages Sweet potato leaf tea, a common herbal tea in Chinese medicine Thyme, contains thymol Tulsi, or holy basil Turmeric tea Uncaria tomentosa, commonly known as cat's claw Valerian is used as a sedative, but clinical evidence for its psychoactive properties are inconclusive. Verbena (vervain) Wax gourd in East Asia and Southeast Asia. Wong Lo Kat, a recipe for herbal tea from Guangdong, China since the Qing Dynasty Woodruff Yarrow
=== Obtaining ssDNA === One of the most critical steps in the SELEX procedure is obtaining single stranded DNA (ssDNA) after the PCR amplification step. This will serve as input for the next cycle so it is of vital importance that all the DNA is single stranded and as little as possible is lost. Because of the relative simplicity, one of the most used methods is using biotinylated reverse primers in the amplification step, after which the complementary strands can be bound to a resin followed by elution of the other strand with lye. Another method is asymmetric PCR, where the amplification step is performed with an excess of forward primer and very little reverse primer, which leads to the production of more of the desired strand. A drawback of this method is that the product should be purified from double stranded DNA (dsDNA) and other left-over material from the PCR reaction. Enzymatic degradation of the unwanted strand can be performed by tagging this strand using a phosphate-probed primer, as it is recognized by enzymes such as Lambda exonuclease. These enzymes then selectively degrade the phosphate tagged strand leaving the complementary strand intact. All of these methods recover approximately 50 to 70% of the DNA. For a detailed comparison refer to the article by Svobodová et al. where these, and other, methods are experimentally compared.
At the ends of the linear chromosomes are specialized regions of DNA called telomeres. The main function of these regions is to allow the cell to replicate chromosome ends using the enzyme telomerase, as the enzymes that normally replicate DNA cannot copy the extreme 3′ ends of chromosomes. These specialized chromosome caps also help protect the DNA ends, and stop the DNA repair systems in the cell from treating them as damage to be corrected. In human cells, telomeres are usually lengths of single-stranded DNA containing several thousand repeats of a simple TTAGGG sequence. These guanine-rich sequences may stabilize chromosome ends by forming structures of stacked sets of four-base units, rather than the usual base pairs found in other DNA molecules. Here, four guanine bases, known as a guanine tetrad, form a flat plate. These flat four-base units then stack on top of each other to form a stable G-quadruplex structure. These structures are stabilized by hydrogen bonding between the edges of the bases and chelation of a metal ion in the centre of each four-base unit. Other structures can also be formed, with the central set of four bases coming from either a single strand folded around the bases, or several different parallel strands, each contributing one base to the central structure. In addition to these stacked structures, telomeres also form large loop structures called telomere loops, or T-loops. Here, the single-stranded DNA curls around in a long circle stabilized by telomere-binding proteins.
=== Database for the GMOs used in the EU === The EUginius (European GMO Initiative for a Unified Database System) database is intended to help companies, interested private users and competent authorities to find precise information on the presence, detection and identification of GMOs used in the European Union. The information is provided in English.
Sources: en.wikipedia.org
It is considered to be one of several antidepressants with a greater risk of hepatotoxicity. The prescribing information warns about bupropion triggering an angle-closure glaucoma attack. On the other hand, bupropion may decrease the risk of development of open angle glaucoma. Bupropion has rarely been associated with instances of Stevens–Johnson syndrome. Bupropion use by mothers in the first trimester of pregnancy is associated with a 23% increase in the odds of congenital heart defects in their children.
Cooling Benchmarking Study CLASP's Global Research team embarked on the development of a series of benchmarking studies in 2010. The first analysis in the series, the Cooling Benchmarking Study, was carried out in partnership with Econoler, Navigant, Centro de Ensayos Innovación y Servicios (CEIS) and the American Council for an Energy Efficiency Economy (ACEEE), and provides an international comparison of energy efficiency performance and policy measures for room air conditioners used in the residential sector. The study, which was finalized in July 2011, delivers first-of-their-kind conversion formulas to compare seasonal performance metrics of room air conditioners across economies that use different test methods. These formulas enable countries and experts a means to compare the stringency of various S&L programs and to identify opportunities to adopt S&L best practices. Opportunities for Success and CO2 Savings from Appliance Energy Efficiency Harmonization The study, published in collaboration with Paul Waide of Navigant Consulting, Lloyd Harrington of Energy Efficiency Strategies, and Michael Scholand, conducts an extensive investigation of the energy efficiency standards and labeling programs in place in China, the European Union, India, Japan, and the US. It documents Minimum Energy Performance Requirements for 24 types of residential, commercial, and industrial appliances and equipment in these economies and identifies products with the greatest potential for global harmonization.
=== Other === Intravaginal administration Vaginal rings Capsules and tablets Suppositories Rectal administration (enteral) Suppositories Suspensions and solutions in the form of enemas Gels Urethral Nasal sprays
Sources: en.wikipedia.org
AOD-9604 is a synthetic peptide fragment of human growth hormone. It corresponds to the C-terminal region known as hGH 176-191 and is studied for metabolic effects. It is not an approved therapeutic drug.
No. It contains only a small portion of the human growth hormone sequence. The full hormone has 191 amino acids and many additional actions that the fragment does not share.
The name refers to the amino acid positions in the human growth hormone chain. The fragment spans residues 176 through 191 at the C-terminal end. This naming convention helps distinguish it from full-length hGH.
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.