Everything below concerns anti-doping analysis. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-02-07. Numbers and descriptions here follow the published literature rather than marketing material.
AOD-9604 is listed as a prohibited substance in sport by the World Anti-Doping Agency. It falls under the peptide hormones, growth factors, related substances, and mimetics class on the prohibited list. Anti-doping organizations treat its presence in an athlete's sample as an adverse finding unless a therapeutic use exemption applies. The prohibition reflects concerns about performance enhancement in competitive settings and the difficulty of distinguishing exogenous peptide use from endogenous hormone fragments.
Detection of AOD-9604 in biological samples relies on analytical techniques capable of distinguishing a small synthetic peptide from related endogenous sequences. Liquid chromatography coupled with tandem mass spectrometry is commonly used for confirmatory analysis. Sample preparation may involve immunoaffinity enrichment or solid-phase extraction to concentrate the peptide. Because the molecule is small and may be present at low concentrations, assay sensitivity and specificity are ongoing analytical challenges. Laboratories also validate methods against reference materials when available.
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.
| Property | Value | Notes |
|---|---|---|
| Regulatory status | Prohibited in sport | Listed by WADA under peptide hormones |
| WADA class | S2 | Peptide hormones, growth factors, related substances, and mimetics |
| Approved therapeutic use | Not established | Clinical research did not lead to broad marketing approval |
| Common detection method | LC-MS/MS | Liquid chromatography-tandem mass spectrometry |
| Sample preparation | Extraction and enrichment | Immunoaffinity or solid-phase extraction may be used |
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Sources: en.wikipedia.org
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== Medical uses == Oxandrolone has been researched and prescribed as a treatment for a wide variety of conditions. Oxandrolone was FDA-approved for treating bone pain associated with osteoporosis, aiding weight gain following surgery or physical trauma, during chronic infection, or in the context of unexplained weight loss, HIV wasting syndrome, and counteracting the catabolic effect of long-term corticosteroid therapy. Oxandrolone is used to quicken recovery from severe burns. In the management of severe burn injuries, clinical trials have demonstrated the therapeutic advantages of oxandrolone, and it was widely adopted as a standard treatment protocol in burn centers globally. Meta-analyses of clinical trials substantiate the efficacy of oxandrolone in severe burn cases: the benefits are manifold and significant, and include a reduction in catabolic weight loss, augmentation of lean body mass, enhancement of donor-site wound healing, and a decrease in the duration of both intensive care unit (ICU) and overall hospital stay. These benefits do not appear to be accompanied by an increased risk of infection, hyperglycemia, or hepatic dysfunction, which reflects the safety profile of oxandrolone in severe burn patient population. Data analysis confirms oxandrolone's advantage in promoting skin healing as an adjunct therapy for adult burn patients. Oxandrolone improves weight regain, bone mineral density, lean body mass, and accelerates wound healing for donor graft sites.
== Advantages and Disadvantages == Advantages: The MS2-BioTRAP method is fast, flexible, and easy to set up; it scales well and allows the study of the physiological conditions of the protein-RNA interactions. The MS2 tag is also effective for small molecules when an MS2 coat protein is used to isolate a variety of ribonucleoprotein particles (RNPs). Disadvantages: One caveat of MS2 tagging is that many copies of the MS2 stem-loop inside the RNA need to be added to produce enough signal to view and track one RNA molecule in the nucleus. When tracking more than one RNA sequence in the nucleus of cultured cells, more than one target sequence is needed. This could be affected by the MS2 protein, which has a classical basic nuclear localization signal (NLS), so it could affect the location of the RNA complex, and the nucleus would have most of the GFP-MS2 (Robert Singer’s lab). The accumulation of GFP-MS2 in the nucleus will result in strong nuclear fluorescence signals, which will delay or prevent the analysis of RNA nuclear localization because it will hinder the analysis of splicing, RNA editing, the nuclear export of RNA, and RNA translation. Moreover, due to the addition of the tag, the RNA secondary structure may introduce an artifact. Additionally, the small noncoding RNA (sRNA) expression levels and regulatory properties will be influenced by MS2 tag. Also, by using MS2 as an affinity tag to purify a protein in E. coli bacteria, scientists expressed MS2-MBP, which is an MS2 coat protein carrying mutations fused with maltose-binding proteins.
Sources: en.wikipedia.org
Yes, the World Anti-Doping Agency classifies AOD-9604 as a prohibited peptide hormone and related substance. Its use by athletes is banned under the relevant anti-doping code.
Confirmatory detection typically uses liquid chromatography with mass spectrometry. Immunoassays may be used for screening, but mass spectrometry provides structural confirmation.
No widely approved therapeutic indication exists for AOD-9604. It has been investigated in clinical studies, but regulatory approvals for general medical use are not established.
It is proposed to promote lipolysis in fat tissue, the breakdown of stored fat into fatty acids and glycerol. The detailed receptor and signaling mechanisms are not fully established.