How to reconstitute Melanotan II

What reconstitution actually does

Melanotan II is sold as a dried powder in a sealed vial. Powder cannot be measured in fractions with any accuracy, so it is dissolved in a liquid first. Bacteriostatic water is the liquid normally used because it contains a preservative intended to limit microbial growth in a vial that will be entered more than once.

Adding water does not change how much peptide is in the vial. A 10 mg vial holds 10 mg whether you add a little water or a lot. What changes is concentration, which is milligrams per millilitre, and concentration is what determines how far up the syringe barrel a given dose sits.

That is the whole of the arithmetic on this page. Milligrams in the vial, divided by millilitres of water added, equals milligrams per millilitre. Everything else follows from that one division.

Reading the concentration table

The table above covers the single vial size commonly sold, 10 mg, against the three water volumes people use. Three things in it are worth pulling out.

First, the relationship is inverse and exact. Tripling the water from 1 mL to 3 mL cuts the concentration to a third, from 10 mg/mL to 3.33 mg/mL. There is no threshold and no rounding built into the peptide itself. The 3.33 figure is just 10 divided by 3.

Second, more water is not a weaker vial. All three rows describe the same 10 mg. A more dilute mix simply means a larger volume of liquid carries the same amount of peptide, which spreads any given dose across more syringe units.

Third, the choice of water volume is a measurement decision, not a dosing decision. Diluting further makes small amounts easier to read on a syringe, because the dose occupies more units. Diluting less means fewer injections' worth of liquid to store. This site does not tell you which trade-off to make.

Turning concentration into syringe units

A U-100 insulin syringe is marked in units, where 100 units is 1 mL. So one unit is one hundredth of a millilitre. Insulin syringes are used for peptides because the volumes involved are far too small to read on a standard syringe.

To convert, divide the dose in milligrams by the concentration in milligrams per millilitre. That gives millilitres. Multiply by 100 to get units on a U-100 syringe. The listings for Melanotan II show doses of 0.25 mg, 0.5 mg and 1 mg, and each of those reads as a different number of units depending on which row of the table you mixed to.

This is why the concentration must be recorded somewhere, on the vial or on paper, at the moment you mix. A vial that has been sitting for two weeks looks identical whether it holds 10 mg/mL or 3.33 mg/mL. The number of units for a given dose is different by a factor of three between them, and nothing about the vial reveals which one you made.

What this site will not tell you

Melanotan II is not approved by any regulator for human use. That is a statement about its legal status, and it also explains the gap in what is known about it.

We hold no reliable human pharmacokinetic data for Melanotan II. This site therefore makes no claim about its half life, how long it takes to clear the body, how frequently it would be taken, or whether repeated doses accumulate. Anyone quoting a specific duration for this compound is not drawing on data we can verify.

The dose amounts listed above are figures that appear in vendor listings. They are inputs to the arithmetic, not recommendations. This page does not tell you what dose to use, what to expect, what side effects occur, or whether the compound is safe or effective. There is no medical review behind this site, and those are clinical questions that a clinician should answer.

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

The three volumes in common use are 1 mL, 2 mL and 3 mL, giving 10 mg/mL, 5 mg/mL and 3.33 mg/mL respectively. All three dissolve the same 10 mg. This page does not recommend one over another, because that choice interacts with dose size and how easily you can read your syringe.

Does adding more water make the Melanotan II weaker?

No. The vial holds 10 mg regardless of how much water you add. More water spreads that 10 mg across a larger volume, so each millilitre contains less. A given dose in milligrams is the same amount of peptide however you mixed it, it just occupies a different number of syringe units.

Can I use regular sterile water instead of bacteriostatic water?

Bacteriostatic water contains a preservative and is intended for vials entered more than once. Plain sterile water has no preservative. The concentration arithmetic on this page is identical either way, since it depends only on volume. Which liquid is appropriate for a given situation is not a question this site answers.

How long does Melanotan II last in the body?

We hold no reliable human pharmacokinetic data for Melanotan II, so this site makes no claim about half life, clearance or accumulation. The arithmetic here concerns concentration and volume only. Any specific duration figure you encounter elsewhere should be traced back to its source before you rely on it.

Why do I need to write the concentration on the vial?

A mixed vial gives no visual clue about how much water went into it. A 10 mg vial in 1 mL and the same vial in 3 mL look the same once dissolved, but the units for a given dose differ threefold. Recording the water volume at the time of mixing is the only reliable way to recover the concentration later.

Is Melanotan II approved for human use?

No. Melanotan II is not approved by any regulator for human use. This page covers concentration arithmetic only and makes no statement about whether the compound is safe or whether it works. Those questions require a clinician, and this site has no medical review.