What is GHRP-6 peptide?
A search for GHRP-6 dosage usually starts with a vial and a question about syringe units. This page answers the math side of that question: how many units a given amount occupies once the vial is mixed with BAC water.
GHRP-6, short for growth hormone–releasing peptide-6, is a synthetic hexapeptide: a chain of six amino acids, His-D-Trp-Ala-Trp-D-Phe-Lys-NH2. It belongs to the growth hormone secretagogue family and acts on the ghrelin receptor (GHS-R1a). GHRP-6 was first described in research in the 1980s and became the parent compound for several later analogs, including hexarelin. Today it is sold online as a research-labeled GHRP-6 peptide, usually as a freeze-dried powder.
You will see the name written several ways: GHRP-6, GHRP 6, or spelled out in full. They all refer to the same hexapeptide. What does vary between listings is the vial size, the salt form, and how clearly the label states the peptide content, and those are the details the calculator depends on. Before entering anything, find the milligram figure on the vial itself rather than relying on a product title or a listing photo.
How much BAC water for a GHRP-6 vial?
There is no universal answer. The BAC water only sets concentration: less water packs more peptide into each syringe unit, more water spreads it out and gives finer measuring steps. The chart shows micrograms per U-100 unit for the two vial sizes most often listed for GHRP-6.
| 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 down a column to see how one vial dilutes as water increases, or across a row to compare the 5 mg and 10 mg vials at the same volume. The product labeling decides which volume applies. The BAC water to peptide ratio guide explains why the numbers move the way they do.
GHRP-6 5mg and 10mg reconstitution: worked examples
Every result comes from three steps: concentration equals vial mg divided by water mL; volume equals the amount divided by concentration; units equal mL multiplied by 100. Here is a GHRP-6 5mg reconstitution, for example, if the amount you already have is written down in micrograms:
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.
And the same amount after a GHRP-6 10mg reconstitution with the same water volume:
The math: 10 mg ÷ 2 mL = 5 mg/mL (5,000 mcg/mL), which is 50 mcg per unit. 100 mcg ÷ 5,000 mcg/mL = 0.02 mL = 2 units on a U-100 syringe.
Twice the peptide in the same water doubles the concentration, so the same amount needs half the units. U-100 units are the same size on every U-100 syringe; the U-100 syringe units to mL chart shows how units map to mL on each barrel size.
GHRP-6 dosage calculator: what the numbers mean
A GHRP-6 dosage calculator on this site is a unit converter, not a recommendation. It takes an amount you already have, from product labeling, a document you are reviewing, or a qualified professional, and returns mL and syringe units for your vial and water volume. It does not say whether that amount is appropriate, how often it applies, or for whom.
Enter the vial mg exactly as printed, the water volume you are checking, and your amount in mcg or mg. Then compare the result with the matching chart row. If the two disagree, the guide to checking calculator math by hand will show which input is off.
GHRP-6 supplier mixing notes
Supplier instructions for GHRP-6 are usually brief. Some suppliers specify bacteriostatic water as the diluent and describe adding it slowly down the vial wall, then swirling gently rather than shaking. Some list the peptide as an acetate salt, which is worth noting when you compare labels: check whether the printed mg refers to the peptide itself or the total powder. Some suppliers specify refrigeration after mixing and give their own use-by window.
The BAC water vial also has limits of its own, covered in the BAC water storage and shelf-life guide. Sterility, handling and administration belong to the product labeling and a qualified professional.
GHRP-6 regulatory status
GHRP-6 is not an FDA-approved drug, and vials sold online are labeled for research use. In sport, the World Anti-Doping Agency lists growth hormone–releasing peptides, including GHRP-6, among prohibited substances. There is no approved labeling to compare a research vial against, so the mg, lot and expiry printed on your own vial are the starting point for the math, and a correct calculation cannot confirm identity, purity or sterility.
GHRP-6 FAQ
What is GHRP-6?
GHRP-6 is growth hormone–releasing peptide-6, a synthetic six-amino-acid peptide in the growth hormone secretagogue family that acts on the ghrelin receptor. It is sold as a research-labeled powder.
Does this page give a GHRP-6 dosage?
No. It converts an amount you already have into mL and U-100 syringe units. It does not recommend an amount, a schedule or a use.
How much BAC water goes in a 5 mg GHRP-6 vial?
The calculator does not choose a volume. The chart shows what each common water volume does to the amount per unit; the product labeling decides which volume applies.
Is GHRP-6 the same as hexarelin?
No. Hexarelin is a later analog built on the GHRP-6 structure with a modified amino acid. They are different peptides and each vial should be calculated from its own label.
Is GHRP-6 FDA-approved?
No. GHRP-6 is not an FDA-approved drug, and vials sold online are labeled for research use.