Melanotan II, self-tan and sunscreen: what is the difference?

Why do people compare these products?

A person wanting a tanned appearance may encounter a self-tanning lotion, a nasal spray advertised as Melanotan II and descriptions of prescription medicines with similar-sounding names. They do different things. One question is how skin colour changes; another is whether a product provides measured UV protection. A third is whether an exact medicine is authorised for a particular medical condition.12

How does Melanotan II relate to pigment?

Melanotan II is a synthetic analogue connected to melanocortin signalling, a family of biological signals that includes effects on pigmentation. A small 1996 pilot in three male volunteers reported increased pigmentation in two participants, along with adverse effects. That experiment shows a biological effect in a very small setting; it does not establish a safe or predictable tanning product for everyone. See the Melanotan II profile.4

Does darker skin mean I can skip sun protection?

No. Melanin, the body’s natural pigment, can absorb some UV, but a tan or a product-induced change in colour is not a measured sunscreen and does not make UV exposure harmless. Sunscreen, clothing and shade address UV exposure. A product’s colour or a darker appearance cannot tell you its sun protection factor (SPF).12

Is a self-tanner the same thing?

No. Many sunless lotions use dihydroxyacetone (DHA), which reacts with substances in the outer skin to create temporary colour; that is different from melanocortin signalling. FDA says a self-tanner provides sun protection only if it also contains sunscreen ingredients and is labelled with an SPF. The colour alone is not the protection. Follow the directions for the exact product.1

What about afamelanotide or bremelanotide?

These are different prescription medicines in the wider melanocortin family, not synonyms for Melanotan II. In the US, SCENESSE (afamelanotide) is indicated to increase pain-free light exposure in adults with a history of phototoxic reactions from erythropoietic protoporphyria, a rare condition; its label says to maintain light protection. VYLEESI (bremelanotide) has a separate, specific indication for acquired, generalised hypoactive sexual desire disorder in premenopausal women under stated conditions. Neither indication establishes that an online Melanotan II tanning product has been approved or is interchangeable.56

For why this peptide is also discussed for sexual response, read the guide to Melanotan II and PT-141.

What can the label on a tanning spray establish?

In an Australian 2026 alert, the TGA reported testing five bottles of one labelled Melanotan II nasal-spray product; estimated contents varied between 22 and 54 mg per bottle. Those results concern those bottles, not every product sold online. They show why the exact product and testing matter. For a changed mole, other persistent skin changes or concerns about a product, a health professional can assess the individual situation. Continue with skin and hair or what a certificate of analysis can show.23

Australia’s TGA also warns that reports involving Melanotan II have included increased moles and freckles, kidney dysfunction and brain swelling. These reports do not establish how often an effect occurs or the risk of every product. The TGA advises anyone who has recently used an unapproved melanotan tanning product to stop and speak with a health professional.3