How to Reconstitute Melanotan-2: Step-by-Step Guide (2026)
Melanotan-2 reconstitution guide: 2mL BAC water into a 10mg vial = 5 units per 250mcg dose. Dilution charts, storage, and tips.
How to Reconstitute Melanotan-2
Melanotan-2 (MT-2) is a synthetic cyclic peptide analog of alpha-melanocyte-stimulating hormone (alpha-MSH). It binds to melanocortin receptors (primarily MC1R) and stimulates melanogenesis — the production of melanin in the skin. It also has effects on appetite, libido, and other melanocortin-mediated pathways.
MT-2 ships as a lyophilized powder, typically in 10mg vials. The reconstitution process is standard for peptides, but the dosing is on the lower end (usually 100-500mcg), which means your dilution directly affects how accurately you can measure each dose.
What You Need
Before you start, gather everything:
- Melanotan-2 lyophilized vial (typically 10mg)
- Bacteriostatic water (BAC water) — not sterile water, not saline
- Insulin syringes — 1mL (100 unit), 29-31 gauge
- Alcohol swabs — for cleaning vial tops
- A clean, flat workspace
Why bacteriostatic water? The 0.9% benzyl alcohol prevents bacterial growth, giving you up to 28 days of refrigerated shelf life. MT-2 protocols are long (often 4-8 weeks), so you will go through multiple reconstitution cycles. BAC water makes this practical.
Step-by-Step Reconstitution
Step 1: Clean Everything
Wipe the tops of both vials (MT-2 and BAC water) with alcohol swabs. Let them air dry for 10 seconds. MT-2 vials get punctured many times over their lifespan — sterile technique from the first draw prevents compounding contamination risk.
Step 2: Draw Your Bacteriostatic Water
Using a fresh insulin syringe, draw your desired amount of BAC water. For a 10mg vial, 2mL is the standard recommendation.
Step 3: Add Water to the Peptide Vial
Insert the needle at an angle, directing water at the glass wall — not onto the powder cake. Let it trickle down slowly. MT-2 is a cyclic peptide with decent stability, but gentle technique is always better.
Step 4: Let It Dissolve
Gently swirl the vial. MT-2 typically dissolves within 1-2 minutes into a perfectly clear, colorless solution. Do not shake — foam makes accurate dose measurement difficult and can degrade the peptide at the air-liquid interface.
Step 5: Store Correctly
Refrigerate immediately at 36-46 degrees F (2-8 degrees C). Use within 28 days.
Dilution Charts
10mg Vial
| BAC Water Added | Concentration | 250mcg Dose | 500mcg Dose |
|---|---|---|---|
| 1mL | 10,000mcg/mL | 2.5 units (0.025mL) | 5 units (0.05mL) |
| 2mLRecommended | 5,000mcg/mL | 5 units (0.05mL) | 10 units (0.1mL) |
| 4mL | 2,500mcg/mL | 10 units (0.1mL) | 20 units (0.2mL) |
5mg Vial
| BAC Water Added | Concentration | 250mcg Dose | 500mcg Dose |
|---|---|---|---|
| 1mL | 5,000mcg/mL | 5 units (0.05mL) | 10 units (0.1mL) |
| 2mLRecommended | 2,500mcg/mL | 10 units (0.1mL) | 20 units (0.2mL) |
Why 2mL? At 2mL in a 10mg vial, a standard starting dose of 250mcg is just 5 units — small but measurable. A 500mcg dose is 10 units. These are clean numbers on an insulin syringe.
The Math (So You Can Do It Yourself)
Concentration = Peptide Amount (mcg) / Water Added (mL)
Then:
Units to inject = Desired Dose (mcg) / Concentration (mcg/mL) x 100
Example: 10,000mcg vial + 2mL water = 5,000mcg/mL. For a 250mcg dose: 250 / 5,000 x 100 = 5 units (0.05mL).
For a 500mcg dose: 500 / 5,000 x 100 = 10 units (0.1mL).
Don't want to do math? Use our Reconstitution Calculator.
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Common Mistakes
Shaking the Vial
Creates foam and air-liquid interfaces that can degrade the peptide. MT-2 vials get used over many weeks with dozens of draws — degradation compounds with each insult. Swirl gently, always.
Using Too Little Water
Adding 0.5mL to a 10mg vial gives you 20,000mcg/mL. A 250mcg dose becomes 1.25 units — nearly impossible to measure on a standard insulin syringe. The minimum practical amount is 1mL, and 2mL is better.
Leaving It at Room Temperature
MT-2 is reasonably stable, but reconstituted solutions still degrade faster at room temperature. Refrigerate between uses. If you accidentally leave it out overnight, the potency may be reduced but the solution is likely still usable if it remains clear. Prolonged room temp storage (days) warrants discarding.
Reusing Needles
MT-2 protocols involve frequent injections over weeks. The temptation to reuse needles is higher. Resist it. Each reuse dulls the needle and introduces contamination risk. Buy syringes in bulk.
Freezing Reconstituted Peptide
Do not freeze the reconstituted solution. If your 10mg vial will last longer than 28 days at your current dose, consider reconstituting only part of a vial or using smaller vial sizes.
Mixing Multiple Vials Together
Do not combine reconstituted solutions from different vials into one container. Each vial has its own sterility window. Use them independently.
How Many Doses Per Vial?
10mg vial at 100mcg/dose (starting) = 100 doses 10mg vial at 250mcg/dose (standard) = 40 doses 10mg vial at 500mcg/dose (higher end) = 20 doses
At 250mcg daily, a 10mg vial would theoretically last 40 days — but since reconstituted peptide should be used within 28 days, plan to start a new vial after 4 weeks regardless of remaining volume.
Storage Quick Reference
| State | Temperature | Shelf Life |
|---|---|---|
| Lyophilized (powder) | Room temp | 6-12 months |
| Lyophilized (powder) | Refrigerated | 2+ years |
| Lyophilized (powder) | Frozen (-20C) | 3+ years |
| Reconstituted (BAC water) | Refrigerated | Up to 28 days |
| Reconstituted (sterile water) | Refrigerated | Use within 24 hours |
Pro tip: MT-2 protocols often start with low doses (100-250mcg) and increase over time. If you start very low, consider using less BAC water (1mL) to keep dose volumes small, then use 2mL on subsequent vials when you have settled on your maintenance dose.
Related Reading
-
Melanotan 2 Dosing Guide — protocols, loading and maintenance phases
-
BPC-157 Reconstitution Guide — mixing reference for the most popular healing peptide
-
TB-500 Reconstitution Guide — reconstitution for higher-dose tissue repair protocols
-
SS-31 Reconstitution Guide — mixing guide for the mitochondrial peptide
-
Melanotan-2 Bloodwork Guide — what labs and safety monitoring to track
-
BPC-157 Bloodwork Guide — biomarker tracking for healing protocols
-
Epitalon Dosing Guide — another peptide in the anti-aging space
References
- Dorr, R.T., et al. (1996). Effects of superpotent melanotropic peptides in animal and human dilute melanocytes. Journal of Investigative Dermatology, 106(4), 672-675.
- Wessells, H., et al. (2000). Melanocortin receptor agonists, penile erection, and sexual motivation: human studies with Melanotan II. International Journal of Impotence Research, 12(Suppl 4), S74-S79. PMID: 11035391
- Nelson, M.E., et al. (2021). Melanotan II user experience: A qualitative study of online discussion forums. Performance Enhancement & Health, 9(3-4), 100203. PMID: 34464955
- Brennan, R., et al. (2014). Risks of unregulated use of alpha-melanocyte-stimulating hormone analogues: a review. BMJ Open, 4(2), e004573.
- USP General Chapter 797: Pharmaceutical Compounding — Sterile Preparations.
This guide is for educational and informational purposes only. It is not medical advice. Melanotan-2 is sold as a research compound and is not FDA-approved for human use. Reconstituting and self-administering peptides carries inherent risks including infection, contamination, and dosing errors. Melanotan-2 carries additional risks including nausea, changes to moles and skin lesions, blood pressure changes, and other side effects. Always use proper sterile technique and consult a qualified healthcare provider before starting any peptide protocol. The Peptide Catalog is not responsible for any adverse effects resulting from the use or misuse of information presented here.