What is hexarelin?
Hexarelin is a synthetic peptide made of six amino acids, which is where the “hex” in its name comes from. Its international nonproprietary name is examorelin. It belongs to the growth hormone–releasing peptide (GHRP) family and acts on the ghrelin receptor, like its parent compound GHRP-6. The main structural difference is a methylated tryptophan residue in place of one of GHRP-6’s amino acids.
Hexarelin was studied extensively in the 1990s and never became an approved medicine. Today hexarelin peptides are sold online as research-labeled freeze-dried powder, most often in 2 mg and 5 mg vials. This page covers the math for those vials: how much peptide sits in each syringe unit once you add BAC water.
Because hexarelin and GHRP-6 are so closely related, listings sometimes group them together or use one name loosely for the other. They are not the same peptide, and a vial of one should never be calculated from the other’s label. The name and milligram figure printed on the vial are what count, and those two inputs are all the calculator needs to start.
How much BAC water for a hexarelin vial?
No single volume is correct. BAC water only sets concentration: less water puts more hexarelin in each U-100 unit, more water puts less in each unit and gives finer measuring steps. The chart below shows micrograms per unit for the two common vial sizes.
| BAC water | 2 mg vial | 5 mg vial |
|---|---|---|
| 1 mL | 20 mcg/unit 2 mg/mL | 50 mcg/unit 5 mg/mL |
| 2 mL | 10 mcg/unit 1 mg/mL | 25 mcg/unit 2.5 mg/mL |
| 3 mL | 6.67 mcg/unit 0.667 mg/mL | 16.67 mcg/unit 1.667 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 watch one vial dilute as water increases, or across a row to compare hexarelin 2mg and 5mg vials at the same volume. The product labeling decides which volume applies. The BAC water to peptide ratio guide explains the pattern behind the chart.
Hexarelin 2mg and 5mg: worked examples
Three steps produce every result: concentration equals vial mg divided by water mL; volume equals the amount divided by concentration; units equal mL multiplied by 100. Here is a hexarelin 2mg vial, for example, if the amount you already have is written down in micrograms:
The math: 2 mg ÷ 2 mL = 1 mg/mL (1,000 mcg/mL), which is 10 mcg per unit. 100 mcg ÷ 1,000 mcg/mL = 0.1 mL = 10 units on a U-100 syringe.
And the same amount from a hexarelin 5mg vial mixed with the same water volume:
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.
More peptide in the same water raises the concentration, so the same amount needs fewer units. If your amount is written in mg, convert it first with the mg to mcg conversion guide, since hexarelin amounts are usually discussed in micrograms.
Hexarelin peptide dosage: what this calculator does
People searching for a hexarelin peptide dosage often land on pages that state numbers without context. This one does not state a dose at all. The calculator converts an amount you already have, from product labeling, a document you are reviewing, or a qualified professional, into mL and U-100 syringe units. It does not decide 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. Then compare the result with the chart row for the same volume. The guide to checking calculator math by hand shows how to verify it without any tool.
Hexarelin peptides from different suppliers
Labels for hexarelin vary more than the name suggests. Most list 2 mg or 5 mg, but other sizes appear, and some suppliers list the peptide as an acetate salt. Before running any numbers, check whether the printed mg refers to the peptide or to the total powder, and enter exactly what the label says.
Some suppliers specify bacteriostatic water as the diluent and describe adding it slowly down the inside of the vial, then swirling gently rather than shaking. Some specify refrigeration after mixing with a use-by window of their own. Where a label gives a diluent or storage instruction, that instruction controls. The general peptide reconstitution guide covers the common steps; sterility, handling and administration belong to the product labeling and a qualified professional.
Hexarelin regulatory status
Hexarelin 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 hexarelin, among prohibited substances. Because there is no approved labeling for comparison, the mg, lot and expiry printed on your own vial are the only starting point for the math, and a correct calculation cannot confirm identity, purity or sterility.
Hexarelin FAQ
What is hexarelin?
Hexarelin, also called examorelin, is a synthetic six-amino-acid peptide in the growth hormone–releasing peptide family. It is a structural analog of GHRP-6 and is sold as a research-labeled powder.
Does this page give a hexarelin 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 2 mg hexarelin vial?
The calculator does not choose a volume. The chart shows the amount per unit for several water volumes; the product labeling decides which one applies.
Can I use this calculator for a 6 mg hexarelin vial?
Yes. The formula works for any vial size. Enter the mg exactly as printed on the label and the calculator adjusts every result.
Is hexarelin FDA-approved?
No. Hexarelin is not an FDA-approved drug, and vials sold online are labeled for research use.