Melanotan I
A melanocortin peptide researched for gradual, controlled melanin production and reduced UV sensitivity, with a milder side-effect profile than Melanotan II.
What It Is
Melanotan I (afamelanotide) is primarily researched for stimulating melanin production, helping skin develop a deeper, longer-lasting tan with less UV exposure. It is also studied for its potential to reduce UV-induced skin damage by increasing the skin’s natural photoprotection.
Melanotan I targets melanocortin receptors involved in melanin production, skin pigmentation, and UV response. Compared to Melanotan II, it is generally considered milder and less stimulating, with fewer side effects such as nausea and flushing, and it does not meaningfully affect libido or appetite — making it a more targeted option when the primary research interest is skin pigmentation and UV protection rather than the broader melanocortin effects of MT2.
Who May Benefit
- Gradual, controlled tanning research
- Reduced UV sensitivity and burn tendency
- Even pigmentation response
- Research where MT2’s libido/appetite effects are unwanted
What to Expect
Melanotan I generally works more slowly than MT2, building melanin response over daily or every-other-day use combined with moderate UV exposure, rather than producing rapid pigmentation changes.
Commonly discussed effects include a gradual, natural-looking tan, reduced tendency to burn, and longer-lasting pigmentation, with a smoother overall side-effect profile than MT2. Possible effects include mild flushing, temporary nausea, and an increase in freckles or moles — typically milder than with Melanotan II.
What to Pair It With
Reconstitution
Suggested Research Dosing Strategy
Administration Notes
Reconstitute gently — swirl rather than shake — and store refrigerated after mixing.
Pair with moderate, responsible UV exposure rather than expecting pigmentation without any sun exposure at all.
Monitor skin changes (new moles, freckling patterns) and maintain good hydration and skin care throughout.
Research Considerations
The key distinction researchers draw between MT1 and MT2 is selectivity: MT1 is researched primarily for pigmentation and UV response with a smoother side-effect profile, while MT2 additionally engages appetite and libido pathways with a stronger, faster, but less targeted effect.
Because melanocortin signaling touches multiple systems, individual response varies, and a conservative, gradual approach is generally favored over aggressive dose escalation.
Have a specific question about Melanotan I? Chat with Pulse, Signal IQ’s free AI research assistant — ask about mechanisms, stacking, or how it compares to other compounds.