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Melanotan II Dosage Calculator

Melanotan II is supplied in 10 mg lyophilised vials. Research draws are small, so many protocols reconstitute with 2-5 mL to make low-microgram draws measurable on an insulin syringe.

The formula

Concentration (mg/mL) = vial strength (mg) ÷ bacteriostatic water (mL). Draw volume (mL) = dose (mg) ÷ concentration (mg/mL). On a U-100 insulin syringe, units = draw volume (mL) × 100. For Melanotan II: a 10 mg vial in 2 mL of water is 5 mg/mL, so a 250 mcg dose is 0.05 mL — 5 units.

Your Melanotan II vial

1 mg = 1,000 mcg

Syringe size

Your result

Draw to

5

units on a U-100 insulin syringe

= 0.05 mL

Concentration
5mg/mL
5,000 mcg/mL
Draws per vial
40
at 250 mcg each

For laboratory and research use only. This calculator is a unit-conversion aid and is not medical guidance or a dosing recommendation.

Buy Melanotan II — 99%+ purity, COA per lot

Melanotan II units per dose — quick reference

U-100 insulin-syringe units for each vial size we ship, reconstituted with 2 mL of bacteriostatic water.

Melanotan II insulin syringe units per dose by vial size
VialConcentration100 mcg250 mcg500 mcg1 mg
10 mg5 mg/mL2 u5 u10 u20 u

How to reconstitute a Melanotan II vial

  1. 1. Bring the vial to room temperature. Let a refrigerated or frozen vial equilibrate before opening so condensation doesn't form on the powder.
  2. 2. Swab both stoppers. Wipe the Melanotan II vial and the bacteriostatic water vial with alcohol and let them dry.
  3. 3. Draw your diluent. Pull the volume you entered above into the syringe.
  4. 4. Run it down the glass wall. Angle the needle so water flows down the side of the vial rather than jetting onto the peptide cake — shear and foaming degrade peptides.
  5. 5. Swirl, never shake. Roll the vial gently until fully clear. Do not vortex or shake.
  6. 6. Label and refrigerate. Mark the date and concentration, then store at 2-8 °C away from light.

Melanotan II calculator FAQs

How many units is 250 mcg of Melanotan II?

A 10 mg vial with 2 mL of bacteriostatic water is 5,000 mcg/mL, so 250 mcg is 0.05 mL — 5 units on a U-100 insulin syringe, with 40 draws per vial.

How do you calculate a Melanotan II dose in syringe units?

Divide the vial strength by the bacteriostatic water you added to get the concentration: concentration (mg/mL) = vial mg ÷ water mL. Then draw volume (mL) = dose (mg) ÷ concentration. On a U-100 insulin syringe, 1.0 mL is 100 units, so units = draw volume × 100.

Does adding more water change how much Melanotan II is in the vial?

No. The vial holds a fixed mass of lyophilised powder. More bacteriostatic water only dilutes it — each syringe unit carries less compound and the draw volume for the same dose gets larger, which can make small doses easier to measure accurately.

How is reconstituted Melanotan II stored?

After reconstitution with bacteriostatic water, research peptides are kept refrigerated at 2-8 °C, protected from light, and away from freeze-thaw cycles. Unreconstituted lyophilised vials are far more stable and are typically stored frozen.

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