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Melanotan II: Research Status and Safety

Product Usage: This PRODUCT IS INTENDED AS A RESEARCH CHEMICAL ONLY. This designation allows the use of research chemicals strictly for in vitro testing and laboratory experimentation only. All product information available on this website is for educational purposes only. Bodily introduction of any kind into humans or animals is strictly forbidden by law. This product should only be handled by licensed, qualified professionals. This product is not a drug, food, or cosmetic and may not be misbranded, misused or mislabeled as a drug, food or cosmetic.

What Is Melanotan II?

Melanotan II is a synthetic analog of alpha-melanocyte-stimulating hormone (α-MSH), studied for its interaction with melanocortin receptors, particularly MC1R, which governs melanin production. It was originally investigated as a photoprotective compound. It is chemically distinct from melatonin, a naming confusion that appears frequently in non-scientific sources.

Current Research Status

Research on the melanocortin pathway that Melanotan II acts on is well established; Melanotan II itself does not carry marketing approval as a therapeutic. A related but chemically distinct analog, afamelanotide, is approved under applicable regulatory frameworks in certain jurisdictions for a specific indication (erythropoietic protoporphyria) and used off-label for vitiligo — that approval does not extend to Melanotan II and should never be implied to. The overwhelming majority of real-world Melanotan II use documented in the literature is unsupervised, self-administered use for tanning or sexual-function purposes sourced through unregulated online vendors, not laboratory research.

Safety Considerations

This is the section that most differentiates Melanotan II from other compounds in this catalog, and it should be read carefully before any research use is considered:
  • Documented case reports link Melanotan II use to new or changing pigmented skin lesions, including case reports of melanoma and melanoma in situ arising in the setting of Melanotan II use, in some cases co-occurring with tanning-bed use.
  • Regulatory bodies in multiple jurisdictions have issued public warnings against unsupervised use of unregulated Melanotan products sold as injections or nasal sprays.
  • Products sourced through unregulated online channels have been found to contain unidentified impurities, independent of any purity claims made by the seller.
  • Long-term safety data in humans remains limited, and existing survey data on real-world users shows widespread unsupervised use despite this gap.

Given this profile, any research use of Melanotan II should be confined strictly to a licensed laboratory setting with institutional oversight, and framed exclusively around mechanism research (melanocortin receptor pharmacology) — never around tanning, cosmetic, or sexual-function outcomes, which is how this compound is discussed almost everywhere else online. CellGenic’s peptide calculator helps research professionals determine the reconstitution volume corresponding to a predetermined research dose, with no registration required.

Quality and Verification Standards

Given the documented impurity concerns tied to unregulated sourcing of this specific compound, verification matters more here than for most other catalog items:
  • Certificate of Analysis (COA) confirming identity and purity per lot
  • HPLC purity data
  • Mycoplasma, sterility, and identity testing per lot
  • cGMP-aligned manufacturing documentation

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Full pricing, ordering, and batch-specific Certificates of Analysis are available exclusively to verified providers.

References:

  1. PubMed: Melanotan II
  2. PubMed: melanotan melanoma

FAQ

What is Melanotan II?
Melanotan II is a synthetic analog of alpha-melanocyte-stimulating hormone (α-MSH) studied for its activity at melanocortin receptors, including MC1R. It has been investigated primarily in melanocortin and pigmentation research.
Melanotan II interacts with melanocortin receptors, including MC1R, a receptor involved in melanin production. Research also examines its activity at other melanocortin receptor subtypes.
Research on Melanotan II has focused on melanocortin receptor pharmacology, pigmentation pathways, and related biological signaling. These experimental findings should not be interpreted as evidence of a clinical use or treatment.
Melanotan II is not approved as a therapeutic product. Regulatory approval of related melanocortin analogs, such as afamelanotide for specific indications in certain jurisdictions, does not apply to Melanotan II.
No. Melanotan II and melatonin are chemically and biologically different compounds. Melanotan II is a synthetic melanocortin analog, while melatonin is a hormone primarily associated with circadian and sleep-wake regulation.
Published case reports have described changes in pigmented lesions following Melanotan II exposure, while regulatory authorities have also warned about unapproved Melanotan products. Long-term human safety data remain limited.
Research-grade Melanotan II should be supported by lot-specific documentation, including a Certificate of Analysis (COA), HPLC purity data, identity testing, applicable sterility and mycoplasma testing, and relevant manufacturing documentation.

REGULATORY DISCLAIMER · PEPTIDES

These products are intended for laboratory research use only. They are not drugs, foods, cosmetics, or medical treatments and must not be used for any form of human or animal administration. All information provided is for educational and scientific reference only and the products should be handled exclusively by licensed, qualified professionals. Misbranding, misuse, or mislabeling of these products as therapeutic or consumable substances is strictly prohibited by law.

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