Melanotan II
researchMelanocortin peptide for skin tanning, with additional effects on libido and appetite
Availability in Thailand
Melanotan II is widely available from Thai peptide vendors at competitive prices. It is one of the most popular cosmetic peptides in Thailand, particularly among expats and the fitness community. It is not typically offered at clinics due to its cosmetic, self-administered nature.
Prescription: Not required from vendors.
Legal status: Available as a research peptide. Not approved as a pharmaceutical in any country.
⚠️ Monitor moles regularly during and after use. Consult a dermatologist if you notice any changes in moles (size, colour, shape, asymmetry). Do not use if you have a personal or family history of melanoma.
Where to Buy in Thailand
Melanotan II is one of the most affordable peptides available in Thailand. Check vendor websites for current rates.
Vendors
Bangkok Health
Bangkok
Meditech peptides and performance compounds with domestic shipping
View vendor →Overview
Melanotan II is a synthetic melanocortin peptide that stimulates melanin production in the skin, producing a tan without extensive UV exposure. It activates melanocortin receptors — particularly MC1R (skin pigmentation), MC4R (sexual arousal), and MC3R (appetite regulation) — which gives it a trifecta of effects: tanning, increased libido, and mild appetite suppression. It was originally developed as a potential preventive treatment for skin cancer through protective tanning.
How It Works
MC1R activation (tanning)
Melanotan II activates melanocortin-1 receptors on melanocytes, stimulating the production and distribution of melanin pigment in the skin. This produces a darkening (tanning) effect that can occur with or without UV exposure, though some UV exposure enhances and accelerates the result.
MC4R activation (libido)
Activates the same melanocortin-4 receptors as PT-141, stimulating dopaminergic pathways involved in sexual arousal and desire. Many users report noticeable libido enhancement as a secondary effect.
MC3R activation (appetite)
Activation of melanocortin-3 receptors contributes to mild appetite suppression. This is a secondary effect but noticed by many users, particularly during the loading phase.
Protocol Quick Reference
Benefits & Uses
- Skin tanning: Produces a deep, natural-looking tan by stimulating melanin production — with less UV exposure required
- Potential UV protection: Increased melanin provides some natural UV protection, though sunscreen should still be used
- Libido enhancement: Notable increase in sexual desire and arousal as a secondary effect of melanocortin activation
- Mild appetite suppression: Some users experience reduced appetite during use
- Affordable: One of the most cost-effective cosmetic peptides available
Side Effects
Common
- Nausea — very common, especially during loading phase. Can be significant
- Facial flushing
- Darkening of existing moles and freckles
- Appearance of new moles (nevi)
- Injection site reactions
Less Common
- Headache
- Fatigue
- Spontaneous erections (in men)
- Mild dizziness
Serious
- Mole changes — new moles or darkened existing moles require monitoring. Any irregular, asymmetric, or rapidly changing mole should be examined by a dermatologist
- Theoretical melanoma concern — by stimulating melanocyte activity, there is debate about whether Melanotan II could promote melanoma in predisposed individuals. Evidence is inconclusive but caution is warranted
- Should NOT be used by individuals with a personal or family history of melanoma
- Can cause significant nausea in some users
- Not recommended during pregnancy
Related Peptides
FAQ
Do I still need sun exposure with Melanotan II?▼
Some UV exposure (15-20 minutes) significantly accelerates and enhances the tanning result, but a tan can develop even with minimal sun exposure. However, Melanotan II does not provide complete UV protection — sunscreen should still be used to prevent sun damage.
Is Melanotan II safe for my moles?▼
Melanotan II commonly darkens existing moles and can cause new moles to appear. This is a known effect of stimulating melanocytes. Most mole changes are benign, but any irregular, asymmetric, or rapidly changing mole should be examined by a dermatologist. Do not use Melanotan II if you have a personal or family history of melanoma.
How do I manage the nausea?▼
Nausea is very common, especially during the loading phase. Strategies that help: start with a low dose (250 mcg), inject before bed so you sleep through the worst of it, and take an antihistamine 30 minutes before injection. Nausea typically improves as your body adjusts over the first week.
How long does the tan last after I stop?▼
The tan fades gradually over 1-3 months after discontinuing Melanotan II, depending on your natural skin type and UV exposure. Maintenance doses of 1-2 injections per week can sustain the tan indefinitely.
Disclaimer
This information is for educational purposes only and does not constitute medical advice. Peptides should be used under the guidance of a qualified healthcare professional. Individual results vary. Always consult your doctor before starting any peptide therapy.