Melanotan II: which line to draw to

Enter your Melanotan II vial amount, the water you added and your dose. Melanotan II is dosed in mcg; the syringe shows exactly where to stop. New to this?

Your line shows up here.

Fill in the vial, water and dose boxes.

Limited human evidence. Not approved anywhere.

In the vial

mg

Water added

mL

Your dose

mgmcg

Syringe

What do these boxes mean?

In the vial: The amount of powder in the vial before you add anything, e.g. “5 mg”. It’s on the label or the box.
Water added: How much bacteriostatic water you mixed in. It doesn’t change how much peptide you get, only how strong the mix is. More water makes each dose a bigger amount that’s easier to measure.
Your dose: How much peptide you want per injection, from your prescription or plan. Not the number of units on the syringe; that’s what we work out.
Syringe: Check the packet: 1 mL, 0.5 mL or 0.3 mL (sometimes written 100, 50 or 30 units). All are U-100: 100 units is 1 mL. Smaller syringes measure small doses more accurately.

When does this vial expire?

Mixed on

Good for (days)

Melanotan II at a glance

Evidence: Limited human evidence. Not approved anywhere.
Vial sizes: 5, 10 mg
Usual dose range: 100–1,000 mcg
How often: Daily load, 1–2×/wk maintenance
Unmixed: Freezer −20°C
After mixing: Fridge 2–8°C, use within 28 days

Melanotan II units to mcg chart

Syringe units on any U-100 insulin syringe (100 units = 1 mL), worked out by the same engine as the calculator. Your own vial and water may differ: use the calculator for your numbers.

5 mg vial + 2 mL water (2,500 mcg per mL)
Dose	Units	mL
100 mcg	4	0.04
250 mcg	10	0.1
500 mcg	20	0.2
1,000 mcg	40	0.4

10 mg vial + 2 mL water (5,000 mcg per mL)
Dose	Units	mL
100 mcg	2	0.02
250 mcg	5	0.05
500 mcg	10	0.1
1,000 mcg	20	0.2

Melanotan II questions

How many units is 100 mcg of Melanotan II?

With a 5 mg vial mixed with 2 mL of bacteriostatic water, 100 mcg is 4 units (0.04 mL) on a U-100 insulin syringe. A different vial size or amount of water changes this, so check it with your own numbers.

How much water do I add to a 5 mg Melanotan II vial?

2 mL of bacteriostatic water is common, which makes 2,500 mcg per mL. More water makes each dose a bigger amount that is easier to measure; it doesn't change how much is in the vial.

How long does mixed Melanotan II last?

Once mixed, keep it at fridge temperature, 2–8°C and use it within 28 days. Unmixed powder: freezer −20°c.

What is Melanotan II?

Melanotan II is a lab-made copy of the hormone that tells skin to make melanin. It’s sold for tanning, was never approved anywhere, and regulators in several countries have warned against it.

The risks

It darkens moles and can make new ones appear, which makes changes harder to spot, and there are case reports of melanoma in people using it. Nausea, flushing and unwanted erections are common. Don’t use it with a history of melanoma, and get any changing mole checked.

Units

Vials are labelled in milligrams and doses are quoted in micrograms.