Melanotan 2 (MT-2) dosage calculator and chart
In a 10 mg vial with 2 mL of water (5 mg/mL), 250 mcg of Melanotan II is 5 units on a U-100 insulin syringe. Melanotan II is dosed in micrograms from a 10 mg vial. The small starting doses land low on the barrel, so the water volume matters.
25 printable pages: dosing cards for the twelve most-used compounds at three water volumes, titration planners, a vial log, and five pages on what to do when it has already gone wrong.
Melanotan 2 reconstitution and dosage chart
A 10 mg Melanotan 2 vial mixed with 2 mL of bacteriostatic water is 5 mg/mL, which is 5,000 mcg/mL, so 250 mcg is 5 units on a U-100 insulin syringe. Mix the same vial with 1 mL and 250 mcg is 2.5 units; with 3 mL it is 7.5 units. The dose does not change, only the mark on the barrel.
| Vial | Water | Concentration | 100 mcg | 250 mcg | 500 mcg | 1000 mcg |
|---|---|---|---|---|---|---|
| 10 mg | 1 mL | 10000 mcg/mL | 1 | 2.5 | 5 | 10 |
| 10 mg | 2 mL | 5000 mcg/mL | 2 | 5 | 10 | 20 |
| 10 mg | 3 mL | 3333 mcg/mL | 3 | 7.5 | 15 | 30 |
Units on a standard U-100 insulin syringe, where 100 units is 1 mL. * means more than 100 units, so more than one 1 mL syringe.
Melanotan 2 doses start small. At 2 mL, 100 mcg is 2 units, and under about 5 units a single misread mark is a large share of the dose, which is the reason to mix with 2 or 3 mL rather than 1. To check another vial or water volume use the calculator above, or the general peptide reconstitution calculator and the bacteriostatic water calculator.
Dose to units at the usual vial and water
| Dose | U-100 units | Draw | Doses per vial | Vial lasts |
|---|---|---|---|---|
| 100 mcg | 2 units | 0.02 mL | 100 | 100 days |
| 250 mcg | 5 units | 0.05 mL | 40 | 40 days |
| 500 mcg | 10 units | 0.1 mL | 20 | 20 days |
| 750 mcg | 15 units | 0.15 mL | 13 | 13 days |
| 1000 mcg | 20 units | 0.2 mL | 10 | 10 days |
10 mg vial in 2 mL of bacteriostatic water (5 mg/mL), U-100 insulin syringe, once daily.
About Melanotan II
Melanotan II is a synthetic analogue of alpha-MSH that darkens skin by stimulating melanin. It is not approved anywhere, has been the subject of regulator warnings, and is sold for research. Nausea, flushing and new or darkening moles are the most reported effects.
Reports describe starting at 100 to 250 mcg to test tolerance, rising over days to 500 mcg or so, then dropping to occasional maintenance doses. A 10 mg vial with 2 mL of water is 5,000 mcg/mL, so 250 mcg is 0.05 mL, or 5 units. That is a small draw; 3 mL of water makes it 7.5 units. Melanotan I (afamelanotide) is a different, longer-acting compound with its own dosing.
The same 10 mg vial at other water volumes
If the draw is awkward to read, change the water, not the dose. The dose stays the same; only the mark moves.
| Vial | BAC water | Concentration | Draw | U-100 units | Doses/vial |
|---|---|---|---|---|---|
| 10 mg | 1 mL | 10 mg/mL | 0.025 mL | 2.5 units | 40 |
| 10 mg | 2 mL | 5 mg/mL | 0.05 mL | 5 units | 40 |
| 10 mg | 3 mL | 3.33 mg/mL | 0.075 mL | 7.5 units | 40 |
All rows above assume a 250 mcg dose and a standard U-100 insulin syringe, where 100 units = 1 mL.
How long it lasts in the body
Not well characterised in humans. A decay curve is only drawn where a human half-life is documented, so there is none here. Treat any precise figure for Melanotan II elsewhere with caution.
Common questions
- How many units is 250 mcg of Melanotan II?
- It depends entirely on how much water you added. In a 10 mg vial reconstituted with 2 mL, the concentration is 5 mg/mL, so 250 mcg is 0.05 mL, which is 5 units on a U-100 insulin syringe. In the same vial with 1 mL of water it is 2.5 units, and with 3 mL it is 7.5 units.
- How much bacteriostatic water for a 10 mg Melanotan II vial?
- 2 mL is the usual choice. It gives 5 mg/mL, which puts the commonly reported range of 100 mcg to 1000 mcg between roughly 2 and 20 units. Aim for a draw between about 10 and 50 units, where the barrel is easiest to read, and add or remove water to get there.
- How many doses are in a 10 mg vial?
- Divide 10 by your dose. At 250 mcg that is 40 doses, which at once daily is 40 days.
- How many units is 250 mcg of Melanotan II?
- In a 10 mg vial with 2 mL of water, 5 units on a U-100 syringe. With 1 mL of water it is 2.5 units, which is hard to read accurately.
- How much water do I add to a 10 mg Melanotan 2 vial?
- 2 mL is the usual choice. It gives 5,000 mcg/mL, which puts 100 to 500 mcg at 2 to 10 units. With 1 mL the same range is half that, which is hard to read; with 3 mL it is 3 to 15 units. The water volume changes the mark, not the dose.
Buying Melanotan II?
Peptulator does not list, rank or link vendors. Whoever the supplier is, use the strength printed on your own vial and check the batch certificate of analysis before you rely on any number here.
Common conversions
The same three-step maths, pre-filled for the doses people ask about most. Units on a U-100 insulin syringe, where 100 units is 1 mL.
- mg to units calculator Any dose at any concentration, both directions, with the full reference tables
- Units to mg calculator What the units you drew are in milligrams
- 1 mg to units The most-asked conversion, at every common setup
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