Melanotan I vs SNAP-8
A detailed comparison to help you understand the differences and choose the right peptide for your research goals.
Melanotan I
Melanotan I (afamelanotide) is a synthetic analog of alpha-melanocyte-stimulating hormone (α-MSH). It is FDA-approved as Scenesse for erythropoietic protoporphyria (EPP), a rare genetic disorder causing severe sun sensitivity.
Full details →SNAP-8
SNAP-8 (Acetyl Octapeptide-3) is a cosmetic peptide that reduces the appearance of wrinkles by modulating muscle contraction. It is often called 'topical Botox' though it works through a different mechanism.
Full details →Side-by-Side Comparison
| Aspect | Melanotan I | SNAP-8 |
|---|---|---|
| Dose Range | 250 mcg–500 mcg | 500 mcg–1 mg |
| Frequency | 1x daily | 1x daily |
| Cycle Length | 1–4 weeks | 4–8 weeks |
| Route | subcutaneous | topical |
| Mechanism | Binds to melanocortin 1 receptors (MC1R) on melanocytes, stimulating eumelanin production. This increases skin pigmentation and provides photoprotection without UV exposure. | Mimics the N-terminal end of SNAP-25, competing with native SNAP-25 for position in the SNARE complex. This reduces neurotransmitter release at the neuromuscular junction, decreasing muscle contraction. |
| Typical Dosage | Clinical: 16mg implant every 2 months. Research protocols for tanning typically use 0.5-1mg daily for loading, then maintenance dosing. | Topical: 3-10% concentration in serums or creams, applied 1-2 times daily to target areas (forehead, crow's feet, etc.). |
| Administration | FDA-approved form is a subcutaneous implant. Research use involves subcutaneous injection. Often combined with minimal UV exposure to enhance results. | Topical application only. Should be applied to clean skin. Often formulated with penetration enhancers for better absorption. |
| Side Effects | Nausea (especially initially), facial flushing, fatigue, headache, and darkening of existing moles or freckles. | Generally well-tolerated topically. Rare reports of mild skin irritation. No systemic effects at cosmetic doses. |
| Best For |
What They Have in Common
Melanotan I, SNAP-8 are both commonly used for:
Which Has Stronger Evidence?
- Skin Health & Aesthetics: Melanotan I has stronger research support.
| Goal | Melanotan I | SNAP-8 |
|---|---|---|
| Skin Health & Aesthetics | high | medium |
Key Studies
Melanotan I
- Use of melanotan I and II in the general population.
BMJ (Clinical research ed.), 2009
- Pharmacologic response of a controlled-release PLGA formulation for the alpha-melanocyte stimulating hormone analog, Melanotan-I.
Pharmaceutical research, 2000
- Discovery and development of novel melanogenic drugs. Melanotan-I and -II.
Pharmaceutical biotechnology, 1998
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