Melanotan-1 (MT-1, also called afamelanotide) mainly affects skin pigmentation, but it also has some interesting side effects related to inflammation, sun protection, and even mood.
Here’s what it does in the body 
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Increases Melanin Production (Primary Effect)
MT-1 stimulates melanocortin-1 receptors (MC1R) in melanocytes.
That leads to:
•Increased melanin (darker skin tone)
•A gradual, even tan without UV exposure
•Reduced risk of sunburn when exposed to UV
This is why it’s used medically in some countries.
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Photoprotection & Skin Health
Melanin isn’t just cosmetic—it’s protective.
MT-1:
•Reduces UV-induced DNA damage
•Lowers sunburn risk
•May reduce oxidative stress in skin cells
Clinically, afamelanotide is approved for erythropoietic protoporphyria (EPP) to prevent severe sun reactions.
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Anti-Inflammatory Effects
Through melanocortin signaling, MT-1:
•Suppresses pro-inflammatory cytokines
•Supports immune balance in skin
•May help inflammatory skin conditions
These effects are subtle but real.
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Mood & Well-Being (Secondary, Mild)
Some people notice:
•Improved mood or calmness
•Reduced stress perception
This is much milder than Melanotan-2 and not sexually stimulating.
MT-1 vs MT-2 (Quick Contrast)
•MT-1 → skin protection, gradual tanning, fewer sides
•MT-2 → faster tanning, appetite suppression, libido effects, more side effects
Melanotan-1 is a skin-protective melanocortin peptide, best suited for people who want:
•A gradual, even tan
•Better UV tolerance
•Fewer systemic side effects than MT-2