What is GHRP-2?
People searching for GHRP 2 dosage usually want to turn an amount into a mark on a syringe, and that arithmetic is what this page handles. GHRP-2 stands for growth hormone releasing peptide-2. It is a synthetic hexapeptide, meaning a chain of six amino acids, and it belongs to the same family of synthetic secretagogue peptides as GHRP-6, hexarelin and ipamorelin. Its nonproprietary name is pralmorelin, and supplier labels write it as GHRP-2, GHRP 2 or pralmorelin.
Several of its six building blocks are D-amino acids or unnatural residues rather than the ordinary forms found in proteins, which is typical of this peptide family. None of that changes the math. This page makes no statement about what GHRP-2 does in the body; it covers the relationship between the powder in the vial, the bacteriostatic water you add and a U-100 syringe.
How much BAC water for a GHRP-2 vial?
Research vials are usually labeled ghrp 2 5mg or 10 mg of freeze-dried powder. The milligrams in the vial are fixed; the volume of BAC water you add decides the concentration. Less water gives a stronger solution and fewer units for the same amount. More water gives a weaker solution and more units. The chart shows micrograms per unit on a U-100 syringe at common water volumes.
| BAC water | 5 mg vial | 10 mg vial |
|---|---|---|
| 1 mL | 50 mcg/unit 5 mg/mL | 100 mcg/unit 10 mg/mL |
| 2 mL | 25 mcg/unit 2.5 mg/mL | 50 mcg/unit 5 mg/mL |
| 3 mL | 16.67 mcg/unit 1.667 mg/mL | 33.33 mcg/unit 3.333 mg/mL |
| 5 mL | 10 mcg/unit 1 mg/mL | 20 mcg/unit 2 mg/mL |
Each cell shows mcg per unit on a U-100 syringe (100 units = 1 mL) and the resulting concentration.
Read across a row to compare the two vial sizes at the same volume, or down a column to see how the same vial thins out as water is added. Every cell comes from one formula: vial mg × 1,000 ÷ (water mL × 100). There is no single correct volume; a figure that divides evenly into the vial mg just gives cleaner numbers. The BAC water to peptide ratio guide explains the pattern.
Worked example: GHRP-2 reconstitution in syringe units
The calculator runs three steps. Vial mg ÷ water mL gives the concentration. The amount you enter ÷ that concentration gives the volume in mL. Volume × 100 gives U-100 units. For example, if the amount you already have is 100 mcg, and a ghrp 2 5mg vial is mixed with 2 mL of BAC water:
The math: 5 mg ÷ 2 mL = 2.5 mg/mL (2,500 mcg/mL), which is 25 mcg per unit. 100 mcg ÷ 2,500 mcg/mL = 0.04 mL = 4 units on a U-100 syringe.
That amount is an arbitrary figure chosen because it comes out clean. It is not a suggestion. The same steps apply to a 10 mg vial; only the concentration changes, so the unit count for the same amount changes too. Keep everything in one unit before dividing: 1 mg = 1,000 mcg. The mg to mcg conversion guide has a quick reference.
GHRP 2 dosage calculator: what the numbers mean
A GHRP 2 dosage calculator answers one narrow question: how many units on a U-100 syringe line up with an amount you already have, given your vial size and your water volume. You bring the amount. The calculator above returns a concentration, a volume in mL and a unit mark. It does not set, suggest or check a dose, a schedule or a frequency, and nothing on this page should be read that way. Those decisions belong to the product labeling and a qualified professional.
Units are the same size on every U-100 syringe: 100 units = 1 mL and 1 unit = 0.01 mL. A 0.3 mL or 0.5 mL syringe simply holds fewer of them. If a result looks off, such as a fraction of a unit or more than a full syringe, the usual cause is an mg and mcg mix-up or a typo in the vial size.
GHRP 2 vs GHRP 6: same math, different peptides
GHRP-2 and GHRP-6 are both synthetic hexapeptides from the same family, and they are often listed side by side in supplier catalogs. They are different molecules with different sequences, so a vial labeled one is not interchangeable with a vial labeled the other.
For the calculator, the difference does not matter. Concentration depends only on the mg printed on the label and the mL of water you added, not on which peptide is in the vial. A 5 mg GHRP-2 vial and a 5 mg GHRP-6 vial mixed with the same volume give identical mcg per unit. What changes is the product itself, which is why the label on each vial is the starting point for every number.
GHRP-2 reconstitution notes and status
GHRP-2 reconstitution follows the general pattern for freeze-dried peptides, but supplier instructions differ, so the label on your vial comes first. Some suppliers specify bacteriostatic water; others list sterile water. Some product sheets say to let the water run down the inside wall of the vial and to swirl gently rather than shake, and some state one storage temperature for the dry powder and another after mixing. Whatever volume you use, enter that exact figure in the calculator.
GHRP-2 is not an FDA-approved drug, and vials sold online are labeled for research use only. A correct calculation cannot confirm a vial’s identity, purity, sterility or stability; the result is arithmetic based on the label, nothing more. For the general mixing steps, see the peptide reconstitution guide.
GHRP-2 FAQ
How much BAC water do you add to a GHRP 2 5mg vial?
There is no single required volume. The chart shows how 1, 2, 3 and 5 mL change the mcg per unit. Follow the product labeling for the diluent and volume, then enter the volume you used in the calculator.
Does this page give a GHRP 2 dosage?
No. It converts an amount you already have into mL and U-100 syringe units for your vial and water volume. It does not recommend a dose, schedule or frequency.
Is GHRP-2 the same as GHRP-6?
No. Both are synthetic six-amino-acid peptides from the same family, but they have different sequences and are sold as separate products. The calculator math is the same for both.
Is GHRP-2 the same as pralmorelin?
Yes. Pralmorelin is the nonproprietary name for GHRP-2, and supplier labels may use either name.
Is GHRP-2 FDA-approved?
No. GHRP-2 is not an FDA-approved drug, and vials sold online are labeled for research use only.