Melanotan I
Alpha-MSH analogue that stimulates melanin production for a natural, gradual tan — without libido or erection side effects of MT-II.
Category
Tanning / Melanocortin
Frequency
Daily injection (loading) then maintenance
Research
Phase 3 / Afamelanotide ApprovedWhat is Melanotan I?
Melanotan I (MT-1), also known as afamelanotide, is a synthetic analogue of the naturally occurring hormone alpha-melanocyte-stimulating hormone (alpha-MSH). It selectively activates MC1 receptors (melanocortin-1 receptors) on melanocytes in the skin, stimulating production of eumelanin — the dark brown/black pigment responsible for tanning.
Afamelanotide (the pharmaceutical version of Melanotan I) has received regulatory approval in Europe and the USA for the treatment of erythropoietic protoporphyria (EPP), a condition that causes extreme sun sensitivity. This makes MT-1 the only melanocortin peptide with an approved clinical version.
Compared to Melanotan II, MT-1 is considered more selective and safer because it primarily activates MC1 receptors rather than MC3/MC4/MC5 receptors — meaning it produces gradual tanning without the sexual side effects, appetite changes, or spontaneous erections associated with MT-II.
How It Works
MC1 Receptor Activation: MT-1 binds selectively to melanocortin-1 (MC1) receptors on melanocytes in the basal layer of the epidermis. This activates intracellular signaling that upregulates tyrosinase activity.
Melanin Synthesis: Increased tyrosinase activity accelerates the conversion of tyrosine to DOPA and then to eumelanin — the protective dark pigment. This creates a base tan that provides some UV protection.
Photoprotective Effect: Eumelanin physically absorbs and scatters UV radiation, reducing DNA damage from sun exposure. This is the same mechanism as natural tanning but achieved faster and at lower UV exposure levels.
Benefits
- Natural-looking, gradual tan without excessive UV exposure
- More selective than MT-II — no libido or sexual side effects
- Photoprotective eumelanin production
- Clinically validated (afamelanotide approved for EPP)
- Maintains tan with lower maintenance doses
- Popular among fair-skinned individuals for safe tanning
- No significant appetite or weight changes
Dosing Protocol
| Phase | Dose | Frequency | Duration |
|---|---|---|---|
| Loading | 500mcg–1mg | Daily | 2–3 weeks |
| Maintenance | 500mcg | Every 3–5 days | Ongoing (with UV exposure) |
Always start at the lowest effective dose and titrate up gradually.
Side Effects
Common
- ⚠Flushing (warmth/redness 30–60 min post-injection)
- ⚠Nausea (especially at first, take with food)
- ⚠Fatigue or yawning shortly after injection
- ⚠Increased existing moles (pigmentation)
- ⚠Mild headache
Rare
- •New moles or changes to existing moles (monitor with dermatologist)
- •Dizziness
- •Spontaneous erections (much rarer than with MT-II)
Who Should NOT Use Melanotan I
- ✕History of melanoma or atypical moles (dysplastic nevi)
- ✕Personal or family history of skin cancer
- ✕Pregnancy or breastfeeding
- ✕Under 18 years old
- ✕Immunosuppressed individuals (monitor moles carefully)
What to Expect
Mild flushing and nausea as body adjusts. Minimal visible tanning yet. Start at lower dose (500mcg) to assess tolerance.
Noticeable tan developing, particularly with some UV exposure (10–20 min sun or light tanning bed). Skin tone deepens gradually.
Full tan established. Transition to maintenance doses every 3–5 days to maintain color. Many users use seasonal loading cycles.
FAQ
Q: Do I need UV exposure to tan with Melanotan I?
A: Some UV exposure accelerates the tan significantly, but MT-1 can produce tanning even with minimal sun. Even 10–20 minutes of daily outdoor activity is usually sufficient during the loading phase.
Q: Melanotan I vs Melanotan II — which should I choose?
A: MT-1 if you want gradual, natural-looking tan without sexual side effects. MT-II if you want faster, darker tan and do not mind the libido-enhancing effects. MT-1 is generally considered safer for long-term use due to its receptor selectivity.
Q: Are new moles dangerous?
A: New mole formation or darkening of existing moles can occur. This requires annual dermatologist check and monitoring. If any mole changes shape, bleeds, or develops irregular borders — consult a dermatologist immediately.
Where to Get Melanotan I in Vietnam
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