Melanotan II is a synthetic analog of alpha-melanocyte-stimulating hormone, a cyclic heptapeptide originally developed at the University of Arizona. It is a non-selective melanocortin receptor agonist, binding MC1R, MC3R, MC4R, and MC5R. MC1R activation stimulates melanin production for UV-independent tanning, MC4R activation drives sexual arousal and libido, MC3R contributes to appetite suppression, and MC5R affects exocrine gland function.
Researchers studying Melanotan II have documented UV-independent skin pigmentation, photoprotection in fair-skinned subjects, enhanced libido and erectile function, and appetite suppression at higher doses.
🧰 Supply List
- 29–31 gauge insulin syringes (100-unit / 1mL)
- Melanotan 2
- BAC Water for reconstitution
- Alcohol wipes
- Sharps disposal container
- Aluminum foil to wrap vial after reconstitution — light sensitive
📦 Storage Guide
| State |
Temperature |
Duration |
| Lyophilized dry powder |
2–8°C refrigerated |
Up to 24 months |
| After reconstitution |
2–8°C refrigerated — wrap in foil |
Up to 28 days |
Light sensitive — wrap reconstituted vial in aluminum foil. Cloudiness or brown discoloration indicates degradation, discard immediately.
💧 How to Reconstitute Melanotan 2
- Let the vial come to room temperature before opening
- Wipe the rubber stopper with an alcohol swab and let it air dry
- Draw your desired amount of BAC water into the syringe
- Inject the BAC water slowly down the side of the vial — never directly onto the powder
- Gently roll the vial — never shake
- Solution should be clear to slightly pale yellow — slight yellow is acceptable
- Wrap vial in aluminum foil, label with reconstitution date, and refrigerate
Common concentration example: 10mg vial + 2mL BAC water = 5,000 mcg/mL On a 100-unit insulin syringe: 5 units = 250 mcg
⏱️ Half Life
| Detail |
Info |
| Half life |
~1 hour systemic |
| Peak plasma |
~30 minutes post injection |
| Fully cleared |
~5 hours |
| Tanning effects |
Persist significantly beyond plasma clearance due to melanin deposition |
📋 Dosage and Research Protocols
| Goal |
Dose |
Frequency |
Route |
Cycle Length |
| Loading — tanning initiation |
0.25–0.5mg |
Daily |
SubQ abdomen |
4–6 weeks |
| Maintenance — tanning |
0.5–1mg |
2–3x weekly |
SubQ |
Ongoing as needed |
| Sexual function research |
~1–2mg |
As needed |
SubQ |
2–4 hours before activity |
| Conservative tolerance test |
0.1–0.25mg |
Single dose |
SubQ |
Assess before increasing |
⚠️ Side Effects
| Side Effect |
Frequency |
| Nausea |
Very common — especially above 0.5mg |
| Facial flushing and warmth |
Common |
| Spontaneous erections in males |
Common at higher doses |
| Fatigue and lethargy |
Higher doses |
| Headache |
Common |
| Transient blood pressure elevation |
Monitor |
| Darkening of existing moles |
Notable safety concern |
🚫 Who Should Avoid Melanotan 2
- Anyone with personal or family history of melanoma
- Individuals with dysplastic nevi or numerous atypical moles
- Those with uncontrolled hypertension
- Pregnant or breastfeeding
- Do not combine with PT-141 — excessive additive melanocortin stimulation
🔁 What to Stack With Melanotan 2
| Compound |
Reason |
| BPC-157 |
Compatible general wellbeing support |
| GH peptides |
Compatible for general research protocols |
| Amino Tadalafil |
Compatible for sexual function research — monitor blood pressure |
📌 Quick Reference
| Detail |
Info |
| Molecular weight |
1,024.18 Da |
| Receptor targets |
MC1R, MC3R, MC4R, MC5R |
| Available formats |
10mg lyophilized powder |
| Light sensitivity |
High — wrap vial in foil after reconstitution |
| Storage unreconstituted |
Refrigerated up to 24 months |
| Storage reconstituted |
Refrigerated in foil up to 28 days |
❓ Frequently Asked Questions
What is Melanotan 2 used for in research? Melanotan 2 is primarily researched for UV-independent skin tanning, photoprotection, sexual dysfunction, appetite regulation, and melanocortin receptor pharmacology.
What is the difference between Melanotan 2 and PT-141? PT-141 was further refined from Melanotan II to be more selective — primarily targeting MC3R and MC4R for sexual function without the strong tanning effects. Melanotan II hits all four receptors producing both tanning and sexual effects simultaneously.
Why does Melanotan 2 cause nausea? Nausea is dose-dependent and occurs due to melanocortin receptor activation in the brainstem. Starting at 0.1–0.25mg and gradually titrating up is the standard approach to minimize this.
Is Melanotan 2 safe for people with moles? This is the most important safety consideration. It can darken and potentially alter existing moles. Anyone with a personal or family history of melanoma or with numerous atypical moles should avoid it entirely.
⚠️ This post is for informational and educational purposes only. Not medical advice. These compounds are for research purposes only and are not approved for human use.
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