GHRP-6 dosage chart: how many units on the syringe

What the chart is actually doing

A U-100 insulin syringe is marked in units, and 100 units is 1 mL. So one unit is one hundredth of a millilitre. The syringe does not know or care what is inside it. It measures volume, nothing else.

That means every figure in the table comes from two steps. First, divide the vial contents by the water added to get a concentration in mg per mL. A 10 mg vial in 2 mL of bacteriostatic water gives 5 mg/mL. Second, divide the dose you want by that concentration to get a volume, then multiply by 100 to convert millilitres into syringe units.

Nothing in this arithmetic is specific to GHRP-6. The same two steps apply to any powder in any vial. What is specific to GHRP-6 is the vial sizes sold, 5 mg and 10 mg, and the dose amounts that appear in listings, which run from 0.1 mg to 0.3 mg.

Three things to notice in the table

The first is that more water does not mean more compound. The 10 mg vial holds 10 mg whether you add 1 mL or 3 mL. Adding more water spreads the same amount of peptide across a larger volume, so each unit on the syringe carries less. That is why 0.1 mg reads as 1 unit at 1 mL and 3 units at 3 mL. The dose is identical in all three cases.

The second is that the numbers at 1 mL are uncomfortably small. From a 10 mg vial in 1 mL, the entire range of listed doses spans 1 to 3 units. On a standard U-100 syringe those marks sit right at the base of the barrel, and a small error in plunger position is a large error in dose. Reconstituting the same vial with more water pushes the same doses further up the barrel, where the graduations are easier to read against.

The third is that everything scales linearly. Double the dose and the units double. Triple the water and the units triple. There is no rounding trap in this particular table because every combination lands on a whole unit, which is unusual and a consequence of the round vial size and the round dose figures.

The 5 mg vial

GHRP-6 is also sold in 5 mg vials. The table on this page is built for the 10 mg vial, so the unit counts shown do not transfer directly.

The relationship is straightforward. A 5 mg vial holds half of what a 10 mg vial holds, so at the same water volume the concentration is halved and the syringe units for a given dose double. Put another way, a 5 mg vial in 1 mL sits at the same concentration as a 10 mg vial in 2 mL, and reads the same on the syringe.

If you are working from a 5 mg vial, the safest approach is to run the two-step calculation yourself rather than borrow a number from the wrong row. Write down the vial size, the water added, the resulting concentration, and the target dose. Any figure that does not follow from those four things is a guess.

What this page does not tell you

There is no reliable human pharmacokinetic data for GHRP-6 that this site is willing to stand behind. That means we make no claim about its half life, how long it takes to clear, whether it accumulates with repeat administration, or how any of that would relate to timing. The arithmetic above concerns concentration and volume. It says nothing about what happens after an injection.

GHRP-6 is not approved by any regulator for human use. This page has no medical review behind it. It does not tell you what dose to take, what to expect, what adverse effects occur, whether the compound is safe, or whether it does anything at all. Those are clinical questions and this is a calculator. If you want them answered, ask someone qualified to answer them.

The dose figures used to build the table are the amounts that appear in product listings. Their presence here is descriptive, not a recommendation. A number being common in the market is not evidence that it is correct, appropriate, or supported by anything.

What we do not know

We hold no reliable human pharmacokinetic data for GHRP-6, 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

Does adding more bacteriostatic water change the dose?

No. The vial holds a fixed amount of powder regardless of how much water you add. More water lowers the concentration, so you draw a larger volume to get the same milligram dose. In the table, 0.1 mg from a 10 mg vial is 1 unit at 1 mL and 3 units at 3 mL, and both deliver 0.1 mg.

Why use a U-100 syringe rather than reading millilitres?

U-100 syringes are graduated in units, where 100 units equals 1 mL. The fine graduations make small volumes easier to measure than the coarse markings on a typical millilitre syringe. If your syringe is not marked U-100, the unit figures on this page do not apply to it.

How much water should I add to the vial?

That is a choice about how the numbers land on your syringe, not a clinical one, and this site does not make it for you. More water gives larger unit readings for the same dose, which are easier to measure accurately. Less water means fewer injections' worth of volume but smaller, tighter readings.

How often is GHRP-6 taken?

This site does not answer that. We hold no reliable human pharmacokinetic data for GHRP-6, so we make no claim about half life, clearance, accumulation, or how any of those would inform a schedule. Frequency is a clinical question and this page is arithmetic only.

The chart is for a 10 mg vial. What about 5 mg?

A 5 mg vial at a given water volume is half the concentration of a 10 mg vial at the same volume, so the syringe units for the same dose double. A 5 mg vial in 1 mL matches a 10 mg vial in 2 mL. Recalculate rather than reading across from the wrong row.

Is GHRP-6 approved for human use?

No. GHRP-6 is not approved by any regulator for human use. This page exists to convert milligrams into syringe units and takes no position on whether the compound should be used at all.