GHRP-2 dosage chart: how many units on the syringe

What the chart actually calculates

The table on this page does one thing: it turns a dose in milligrams into a mark on an insulin syringe. It is division, not pharmacology. The vial holds a fixed mass of powder. You add a volume of bacteriostatic water. Mass divided by volume gives a concentration, and the dose divided by that concentration gives a volume to draw.

The chart covers the 10 mg vial with 1, 2 or 3 mL of water, and doses of 0.1, 0.2 and 0.3 mg. Those are the vial and dose combinations that appear in listings. GHRP-2 is also sold in a 5 mg vial, which is not in this table; the arithmetic is the same shape, but we only publish figures we have computed.

Units on a U-100 syringe are volume marks. They are not milligrams and they are not a measure of potency. Two people can both draw the same number of units and receive different masses of peptide if they mixed their vials differently. That is why every figure on this page is quoted with its vial size and its water volume attached.

The two things to notice in the table

First, the water volume is the whole story. Look down any single dose row group. A 0.1 mg dose is 1 unit at 1 mL, 2 units at 2 mL and 3 units at 3 mL. Tripling the water triples the number on the syringe for the identical dose. The concentration falls from 10 mg/mL to 5 mg/mL to 3.33 mg/mL as you dilute, and the volume you draw rises to compensate.

Second, the same unit count appears at different doses. Three units is 0.1 mg if the vial went in with 3 mL of water, but 0.3 mg if it went in with 1 mL. That is a threefold difference in mass behind an identical looking syringe. A unit count written down without its water volume is meaningless, and this is the single most common way people misread a peptide chart.

Third, and less obvious: the numbers in this table are small. At 10 mg/mL, every dose in the chart lands in the low single digits of units. Small numbers on a syringe are harder to draw accurately than large ones, because the marks are coarse relative to what you are measuring and because a drop left in the needle hub is a larger fraction of a small draw. Using more water pushes the same dose further up the barrel and spreads it across more marks.

Reconstitution mechanics that affect the number

The chart assumes the water you inject into the vial is the water you get back out. Add the bacteriostatic water slowly against the glass wall rather than directly onto the powder, then leave it to dissolve. Swirl gently if needed. The volume you push in defines the concentration for every draw afterward, so measure it on the syringe rather than estimating.

The lyophilized powder occupies some volume of its own once dissolved, and a small amount of liquid stays behind in the vial and in the needle. These are real and they mean the chart is an idealization. It is close enough to be useful and it is not a guarantee of what ends up under the skin.

Write the water volume on the vial label as soon as you mix it. Once the powder is in solution there is no way to look at the vial and tell whether it holds 10 mg/mL or 3.33 mg/mL. An unlabeled reconstituted vial is an unusable vial.

What this page does not tell you

We hold no reliable human pharmacokinetic data for GHRP-2. This site therefore makes no claim about its half life, how long it takes to clear, how often anything should be administered, or whether repeated administration accumulates. Where you would expect a timing recommendation, there is nothing here, because there is nothing we can verify.

GHRP-2 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, or whether the compound does anything at all. Those are clinical questions and this is a conversion table.

The doses listed here, 0.1, 0.2 and 0.3 mg, are figures that appear in vendor listings. Their presence in the chart is a statement about what is commonly written down, not an endorsement of any of them. If a dose you have seen is not in the table, we have not computed it and you will not find it here.

What we do not know

We hold no reliable human pharmacokinetic data for GHRP-2, 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 0.2 mg of GHRP-2?

It depends entirely on how the vial was mixed. From a 10 mg vial in 1 mL of bacteriostatic water, 0.2 mg is 2 units on a U-100 syringe. From the same vial in 2 mL it is 4 units, and in 3 mL it is 6 units. The dose is identical in all three cases.

Does adding more water mean a weaker dose?

No. More water lowers the concentration, so you draw more units to deliver the same mass of peptide. A 10 mg vial in 3 mL gives 3.33 mg/mL instead of 10 mg/mL, and the chart shows the unit counts rising to match. The amount injected is unchanged as long as you read the correct row.

Which water volume should I use?

This page does not recommend one. Mechanically, more water spreads a small dose across more syringe marks, which makes it easier to draw consistently, and less water means fewer injections' worth of volume per vial. Both 1 mL and 3 mL appear in the chart because both are used.

How long does GHRP-2 stay active?

We do not answer that. There is no reliable human pharmacokinetic data for GHRP-2 that this site is willing to stand behind, so we make no claim about half life, clearance or duration. The chart on this page concerns concentration and volume only.

Why is a 5 mg vial not in the chart?

GHRP-2 is sold in both 5 mg and 10 mg vials, but the computed figures on this page cover the 10 mg vial. We publish only conversions we have calculated rather than asking readers to scale numbers themselves, because scaling errors are exactly the mistake the chart exists to prevent.

Is a U-100 syringe the right one for these doses?

The entire chart is expressed in U-100 units, so the figures only apply to a syringe with U-100 markings. A syringe with different graduations will give a different number for the same volume. Check the barrel before using any row from the table.