Everything below concerns afamelanotide. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2026-05-13. Where a claim depends on a specific study, the study is described rather than over-claimed.
Melanotan II holds no marketing authorisation from the Food and Drug Administration, the European Medicines Agency, the UK Medicines and Healthcare products Regulatory Agency or Australia's Therapeutic Goods Administration. Products sold under that name are treated as unapproved new drugs, and their sale or import is prohibited in several jurisdictions. Other countries classify the peptide as a prescription-only medicine or place it among controlled substances, so the legal position changes with the destination market. No pharmacopoeial monograph supplies an official specification, because the material is not a licensed pharmaceutical. Consequently, products offered online are not manufactured to a shared public standard.
The peer-reviewed record is dominated by small early-phase studies, case reports and pharmacovigilance summaries rather than large randomised trials. Papers typically examine tanning response, receptor selectivity or patterns of reported adverse events. Many note that participants obtained the peptide outside a clinical setting, which limits verification of composition and administered amount. Reported events vary widely, and causality is frequently unclear because the identity and purity of self-sourced material are unknown. Open questions include whether repeated melanocortin receptor stimulation produces cumulative effects, and how often label claims match actual content.
Identification in laboratories relies on reversed-phase liquid chromatography coupled with tandem mass spectrometry, with product-ion spectra compared against a certified reference standard. High-resolution mass spectrometry supplies accurate mass confirmation, and peptide mapping after enzymatic digestion separates melanotan II from closely related analogues. Quantitation of seized material is complicated by unknown counter-ions and residual trifluoroacetate left from purification. Immunoassays raised against alpha-melanocyte-stimulating hormone can cross-react, so chromatographic confirmation is normally required. Urinary detection windows are short, and reported limits of detection differ substantially between laboratories.
Melanotan II is a synthetic cyclic heptapeptide with the sequence Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-NH2, corresponding to a molecular formula of C50H69N15O9 and a monoisotopic mass near 1024 daltons. It was designed as a structural analogue of alpha-melanocyte-stimulating hormone, a peptide hormone produced by cleavage of proopiomelanocortin. A lactam bridge between the aspartate and lysine side chains closes the ring, and the C-terminal amide removes a free carboxyl group. Both modifications increase resistance to enzymatic degradation compared with the linear parent hormone. Four substitutions distinguish it from afamelanotide, the linear analogue studied under the name melanotan I.
Receptor-binding studies classify melanotan II as a non-selective melanocortin agonist. It interacts with MC1R, MC3R, MC4R and MC5R, with reported affinities in the low nanomolar range and no strong subtype preference. Activation of MC1R on dermal melanocytes shifts pigment synthesis toward eumelanin, the dark polymer deposited in melanosomes and transferred to keratinocytes. Because the same peptide engages MC4R in the hypothalamus, it also appears in animal work on food intake and erectile response, which is why it is discussed in both pigment and metabolic research. Which receptor populations dominate after systemic exposure in humans is not fully established.
Published pharmacokinetic information is limited and comes mainly from small studies rather than registrational trials. Plasma half-life is usually described as short, on the order of tens of minutes, followed by rapid tissue distribution and clearance of the intact peptide. Metabolites and low concentrations of parent compound have been reported in urine, a detail relevant to anti-doping and forensic testing. Whether repeated exposure changes receptor sensitivity or clearance over time remains an open question. Values differ noticeably between analytical assays, so published numbers should be read as approximate rather than definitive.
| Property | Value | Notes |
|---|---|---|
| Regulatory status | Unapproved in the US, EU and Australia | Sale and import restricted; no licensed product |
| Typical test matrices | Urine, serum, seized powder | Urinary detection window is short |
| Primary identification method | LC-MS/MS against a reference standard | High-resolution mass used for confirmation |
| Data sources in the literature | Small trials, case reports, pharmacovigilance | No registrational trial dataset exists |
| Common marketing names | Melanotan 2, MT-II, MT-2 | Label content may not match declared peptide |
Lyophilised peptide powder is comparatively stable when kept dry, cold and protected from light. Once dissolved, the molecule is exposed to hydrolysis, oxidation and microbial growth, and degradation accelerates at higher temperatures and in alkaline solution. Repeated freeze-thaw cycles concentrate solutes and promote aggregation. Handling guidance for research peptides commonly clusters around freezer temperatures for powder and short refrigerated use for reconstituted solutions, with pH control and sterile technique applied throughout.
Verification of a purchased sample requires documentation linking a batch to a certificate of analysis, and that document should be read for the methods used rather than the headline purity figure. A single chromatographic percentage does not establish identity. Independent laboratories can perform identity and content assays, but no such test establishes that a product is suitable for human use. Claims about efficacy rest largely on small, early studies rather than on replicated controlled trials, and that gap remains open.
Regulatory treatment varies between countries. Several national medicines agencies have classified the peptide as unapproved, and customs authorities in some jurisdictions seize shipments on that basis. A few jurisdictions channel supply through prescription-only frameworks that do not list the substance by name. Because the material circulates mainly through online vendors, composition and purity are rarely verified before sale. Surveys of unapproved peptide products have reported labels that did not match measured content in a substantial fraction of samples.
Melanotan II is a synthetic cyclic heptapeptide analogue of alpha-melanocyte-stimulating hormone, a naturally occurring peptide involved in pigmentation signalling. Its structure substitutes a lactam bridge between side chains to increase stability relative to the native hormone. The compound is also known by the shorthand MT-II and by several non-proprietary synonyms used in research catalogues. It is not an approved therapeutic product in any major jurisdiction; material sold under this name is typically offered as a laboratory reagent rather than as a medicine.
Activity is attributed to agonism at melanocortin receptors, particularly MC1R and MC4R. Activation of MC1R on melanocytes increases melanin synthesis, which underlies the reported tanning effect. MC4R engagement in the central nervous system is linked to appetite suppression and to effects on sexual arousal reported in early clinical studies. Those studies were small and were not designed to establish efficacy or long-term safety. Receptor selectivity among the melanocortin subtypes is not absolute, which complicates attribution of any effect to a single pathway.
In Australia, ketamine is listed as a Schedule 8 controlled drug under the Poisons Standard (October 2015). In Canada, ketamine has been classified as a Schedule I narcotic since 2005. In December 2013, the government of India, in response to rising recreational use and the use of ketamine as a date rape drug, added it to Schedule X of the Drug and Cosmetics Act, requiring a special license for sale and maintenance of records of all sales for two years. In the United Kingdom, it was labeled a Class B drug on 12 February 2014. In 2025, the Home Office requested a review of the classification with a view to changing it to Class A, based on an increase in recreational use and the negative health consequences. The increase in recreational use prompted ketamine to be placed in Schedule III of the United States Controlled Substances Act in August 1999.
=== Application === Among these four moisture conditions of aggregates, saturated surface dry is the condition that has the most applications in laboratory experiments, research, and studies, especially those related to water absorption, composition ratio, or shrinkage tests in materials like concrete. For many related experiments, a saturated surface dry condition is a premise that must be realized before the experiment. In saturated surface dry conditions, the aggregate's water content is in a relatively stable and static situation where its environment would not affect it. Therefore, in experiments and tests where aggregates are in saturated surface dry condition, there would be fewer disrupting factors than in the other three conditions.
An animal with a disease either the same as or like a disease in humans. Animal models are used to study the development and progression of diseases and to test new treatments before they are given to humans. (NCI) Animal study
Sources: en.wikipedia.org
Dennis Richard Abercrombie Matheson. Chair, Tenant Farmers Association Cymru. For services to the Tenanted Agricultural Sector in Wales. Zamanganga Mbatha. Head of Profound and Multiple Learning Disabilities, Royal Docks Academy. For services to Teenagers with Learning Difficulties in the London Borough of Newham. Hugh McAninch. Lately Regional Coordinator, The Compassionate Friends. For services to Bereaved Families in Scotland. Elizabeth McCrory. Regional Lead, UK Export Finance. For services to Exporting Businesses in Northern Ireland. Gordon Stirling McIntyre. Founder and Chair, Hospitality Health. For services to the Tourism and Hospitality Industry in Scotland. Gwyneth Kathleen McKenzie. Team District Commissioner, Hadrian District, Scout Association. For services to Young People and to the community in Northumberland, North Tyneside and Newcastle upon Tyne. James Ian McLean. Deputy Chief Nurse, Programme Delivery, Health Education England. For services to Nursing. Robert William McVeigh. For services to the Commonwealth Games in Northern Ireland. Donna Elaine McWilliams. Deputy Group Co-ordinator, Stepping Stones Play and Learn. For services to Early Years and Special Needs Education. Marion Anne Meakin. Senior Probation Officer, North West Probation Service, HM Prison and Probation Service. For services to Reducing Reoffending and Public Protection. Christiana Melam, Chief Executive, National Association of Link Workers. For services to Social Prescribing. Mohammed Gulam Moula Miah. Chairman, Rajnagar Business Group and Moula Foundation.
Chemical pathology, also called clinical chemistry Hematopathology Blood banking - Transfusion medicine Clinical microbiology Cytogenetics Molecular genetics pathology. In some countries other sub specialities fall under certified Clinical Biologists responsibility:
==== Europe ==== In the European Union, Subutex and Suboxone, buprenorphine's high-dose sublingual tablet preparations, were approved for opioid use disorder treatment in September 2006. In the Netherlands, buprenorphine is a list II drug of the Opium Law, though special rules and guidelines apply to its prescription and dispensation. In France, buprenorphine prescription by general practitioners and dispensed by pharmacies has been permitted since the mid-1990s as a response to HIV and overdose risk. Deaths caused by heroin overdose were reduced by four-fifths between 1994 and 2002, and the incidence of AIDS among people who inject drugs in France fell from 25% in the mid-1990s to 6% in 2010.
From 2014, biosimilars were manufactured by several companies and sold at a lower price than before patent expiry. In 2014, Indian drugmaker Cadila Healthcare declared the launch of the first adalimumab biosimilar at a fifth of its US price. The generic was launched under the brand name Exemptia. In 2016, Indian drugmaker Torrent Pharmaceuticals launched its biosimilar for adalimumab, called Adfrar. It is the second generic biosimilar of adalimumab. In September 2016, the FDA approved Amgen's biosimilar adalimumab-atto, sold under the brand name Amjevita. In August 2017, the FDA approved German pharmaceutical company Boehringer Ingelheim's biosimilar, Cyltezo. In 2017, the biosimilars Amgevita, Solymbic, Imraldi, and Cyltezo were approved for use in the European Union. In 2018, the biosimilars Halimatoz, Hefiya, Hyrimoz, and Hulio were approved for use in the European Union. From 2018, Adalimumab biosimilars became available in the European Union, allowing the National Health Service to make record-breaking cost-savings, as this is the single most expensive drug used in NHS hospitals, costing more than £400 million a year for about 46,000 patients. In October 2018, adalimumab-adaz (Hyrimoz) was approved for use in the United States. In April 2019, Idacio and Kromeya were approved for use in the European Union. In July 2019, adalimumab-bwwd (Hadlima), produced by Samsung Bioepsis, was approved for use in the US. In November 2019, adalimumab-afzb (Abrilada) was approved in the United States. It is the 25th biosimilar approved by the FDA.
Sources: en.wikipedia.org
Alumni of Morgan State University have achieved notability in the fields of athletics, science, government, law, the arts, and the military including four members of the NFL Football Hall of Fame (Willie Lanier, Roosevelt Brown, Leroy Kelly, and Len Ford); Black Enterprise Magazine publisher Earl Graves; Clarence Dunnaville, lawyer and civil rights activist; and nearly a dozen U.S. Army generals, including Lieutenant General William "Kip" Ward, the first commanding officer of the United States Africa Command. The New York Times sports columnist William C. Rhoden, playwright, TV producer, and entrepreneur David E. Talbert, and American-Israeli Olympic sprinter Donald Sanford are also alumni. Civil rights activist and music critic for the Baltimore Afro-American newspaper Adah Jenkins graduated from Morgan State, as did scientist and inventor Valerie Thomas.
== Deaths == Deaths directly attributable to this form of heroin are difficult to confirm because coroner's offices frequently do not have a method to track cause of death to one specific form of a drug. Centralized reporting of cheese heroin deaths does not exist in Texas since each county has its own official to sign death certificates.
== Political views == McGregor was an outspoken critic of Brexit. Although opposed to Scottish independence from the United Kingdom in the 2014 Scottish referendum, McGregor later declared during an interview that he would have voted for independence if he had been able to cast his vote the day after the United Kingdom left the European Union. In 2020, he voiced his support for Scottish independence, saying that "it's time". McGregor is a feminist. In 2009, he said, "Women are always expected to be naked in films, but I like to try and do it so they are not naked—have the women not be naked. It's a feminist thing that I do." In 2017, he refused to appear on Piers Morgan's show after Morgan made disparaging remarks about the participants of the 2017 Women's March. In October 2023, McGregor signed open letters related to the Gaza war, including one calling on President Joe Biden to secure the release of hostages taken by Hamas and one by Artists4Ceasefire that called for a ceasefire in the war.
== Drying defects == Drying defects are the most common form of degrade in timber, next to natural problems such as knots. There are two types of drying defects, although some defects involve both causes:
This will typically be 22 kilometres (14 miles) wide, but could be more (if a state has chosen to claim a territorial sea of less than 22 kilometres), or less, if it would otherwise overlap another state's contiguous zone. However, unlike the territorial sea, there is no standard rule for resolving such conflicts, and the states in question must negotiate their own compromise. America invoked a contiguous zone out to 44 kilometres from the baseline on 29 September 1999. Exclusive economic zone: An exclusive economic zone extends from the baseline to a maximum of 370 kilometres (230 miles). A coastal nation has control of all economic resources within its exclusive economic zone, including fishing, mining, oil exploration, and any pollution of those resources. However, it cannot prohibit passage or loitering above, on, or under the surface of the sea that complies with the laws and regulations adopted by the coastal State in accordance with the provisions of the UN Convention, within that portion of its exclusive economic zone beyond its territorial sea. The only authority a state has over its EEZ is, therefore, its ability to regulate the extraction or spoliation of resources contained therein, and border-control measures implemented to this effect focus on the suppression of unauthorised commercial activity. Vessels not complying with a state's maritime policies may be subject to ship arrest and enforcement action by the state's authorities.
Sources: en.wikipedia.org
Regulatory treatment varies by country. In the United States, the European Union and Australia it is an unapproved drug and its sale is restricted, while some other jurisdictions list it as prescription-only or controlled. The applicable rules depend on the country of import.
Reversed-phase LC-MS/MS is the usual approach for both identification and quantitation. High-resolution mass spectrometry and peptide mapping serve as confirmatory methods. Immunoassays are rarely used alone because of cross-reactivity.
Published testing of seized and purchased samples frequently reports discrepancies between declared and measured peptide content. Counter-ion content and residual solvents add further variation. Independent analysis is the only way to confirm composition.
No. It is a synthetic analogue carrying four amino acid changes, a lactam ring and an amidated C-terminus. The natural hormone is a linear thirteen-amino-acid peptide processed from proopiomelanocortin.