Melanotan II dosage chart: how many units on the syringe

What the syringe units actually measure

An insulin syringe is marked in units, not milligrams. The units are a volume scale. On a U-100 syringe the full 1 mL barrel is marked off as 100 units, so each unit is one hundredth of a millilitre. The syringe has no idea what is dissolved in the liquid.

That means the number of units for a given dose depends on two things: how much peptide is in the vial, and how much bacteriostatic water you added to it. Those two figures set the concentration in mg/mL. The dose divided by that concentration gives the volume, and the volume converts to units.

So there is no single correct unit count for a Melanotan II dose. The chart on this page covers a 10 mg vial, the only vial size commonly listed, across the three water volumes people typically use and the three dose amounts that appear in listings.

Three things worth noticing in the chart

First, more water means more units for the same dose. A 0.25 mg dose is 3 units when the vial is mixed with 1 mL, 5 units at 2 mL, and 8 units at 3 mL. Nothing about the amount of peptide changed. Only the dilution did. A unit count quoted without the vial size and water volume attached to it is meaningless.

Second, the doses scale cleanly. At 2 mL, 0.25 mg is 5 units, 0.5 mg is 10 units, and 1 mg is 20 units. Doubling the dose doubles the units at fixed concentration. That linearity is a useful check on your own arithmetic. If your numbers do not scale that way, you have made an error.

Third, the smallest dose at the highest concentration lands on very few marks. A 0.25 mg dose from a 10 mg vial in 1 mL is 3 units. Reading and drawing three units accurately is harder than reading eight, and a small error in plunger position is a larger fraction of the intended dose. That is a mechanical fact about measuring small volumes, not a recommendation about which mixing volume to use.

The 3.33 mg/mL figure

Mixing a 10 mg vial with 3 mL of bacteriostatic water gives a concentration that does not divide evenly. The chart shows 3.33 mg/mL, which is a rounded value. The unit counts in that column are rounded to the nearest whole unit as well, because a syringe cannot be read to a fraction of a mark.

Rounding matters more at small volumes than large ones. The 0.25 mg row at 3 mL is 8 units, the nearest mark rather than an exact landing. Whether that rounding is acceptable is not a question this page can answer for you.

The 1 mL and 2 mL columns produce whole numbers throughout, because 10 mg/mL and 5 mg/mL divide evenly into the listed doses.

What this page does not tell you

Melanotan II is not approved by any regulator for human use. This site has no medical review process and does not answer clinical questions.

We hold no reliable human pharmacokinetic data for Melanotan II. This page makes no claim about its half life, how long it stays in the body, how quickly it clears, or whether repeated doses accumulate. Anyone quoting a specific duration or clearance figure for this compound is not working from data we can verify. The arithmetic here concerns concentration and volume only.

We also do not say which dose to use, how often, what results to expect, what side effects occur, or whether any of it is safe. The dose amounts in the chart are the figures that appear in listings. Their presence here is a record of what is sold, not an endorsement of any of them. If you need a judgement rather than a conversion, this is the wrong page.

Checking the arithmetic yourself

The calculation has two steps. Divide the vial size in milligrams by the water volume in millilitres to get the concentration. Divide your dose in milligrams by that concentration to get the volume in millilitres. Then read that volume off the syringe scale.

Do this once by hand against a row in the chart before trusting any chart, including this one. If your result matches, your method is sound and you can extend it to inputs not listed here. If it does not match, find out why before going further.

Insulin syringes are sold with more than one barrel capacity, and the unit markings are spaced differently on each. Every figure here assumes a U-100 scale. Confirm the marking on the syringe in your hand matches before reading anything from the table.

What we do not know

We hold no reliable human pharmacokinetic data for Melanotan II, so this site makes no claims about its half life, how long it takes to clear, or how it accumulates. The arithmetic below concerns concentration and volume only.

This page answers arithmetic and handling questions. It does not tell you what dose to take, what to expect, or whether anything is appropriate for you, and there is no medical review behind it.

Common questions

How many units is 0.25 mg of Melanotan II?

It depends on how the vial was mixed. From a 10 mg vial in 1 mL of bacteriostatic water, 0.25 mg is 3 units on a U-100 syringe. The same dose from a 10 mg vial in 2 mL is 5 units, and in 3 mL it is 8 units.

How much bacteriostatic water should I add to a 10 mg vial?

This page does not recommend a mixing volume. It shows the unit counts that result from 1 mL, 2 mL and 3 mL so you can compare them. More water gives a lower concentration and a higher unit count for the same dose.

Why do 0.5 mg in 1 mL and 0.25 mg in 2 mL both come out at 5 units?

Because the units measure volume, not peptide. Halving the dose while halving the concentration leaves the same volume of liquid. It is a good illustration of why a unit count means nothing without the vial size and water volume attached to it.

What is the half life of Melanotan II?

We have no reliable human pharmacokinetic data for this compound, so this site makes no claim about its half life, clearance or accumulation. Figures circulating elsewhere are not something we can verify. Everything on this page is concentration and volume arithmetic.

Is Melanotan II approved for use?

No. It is not approved by any regulator for human use. This site has no medical review and does not assess safety, effectiveness or legality. The conversions here describe what is sold, not whether it should be used.

Does this chart work for a vial size other than 10 mg?

No. Every figure here is calculated from a 10 mg vial, the size commonly listed for this compound. A different vial size changes the concentration and therefore every unit count. Redo the two-step calculation with your own vial size.