GHRP-2, GHRP-6, and hexarelin are growth-hormone-releasing peptides (GHRPs) studied in GH-axis research contexts. All three arrive as lyophilized powder, are dosed in micrograms, and share the same reconstitution math — community sources document 5mg and 10mg vials with simple bacteriostatic water ratios.
Research-context information only. GHRP-2, GHRP-6, and hexarelin are research chemicals without FDA approval as finished pharmaceutical products. The reconstitution math below reflects vendor documentation and community-reported protocols. Research sources describe GH-secretagogue applications; outcome claims are not supported by FDA-approved indications. This article reports what has been documented, not what should be done. Consult a licensed physician for personal medical decisions.
GHRP vial sizes
GHRP-2, GHRP-6, and hexarelin are most commonly available in 5mg and 10mg lyophilized vials in the research peptide market. The lyophilized peptide appears as a white powder. Their molecular weights are close — GHRP-2 ~817 Da, GHRP-6 ~873 Da, hexarelin ~887 Da — so identical bacteriostatic water volumes produce identical concentrations across all three.
Community sources cite microgram-scale doses, commonly around 100-300 mcg per administration, taken two to three times daily. Because each dose is small and the vial is punctured often, the bacteriostatic water ratio is usually chosen to keep doses readable and to support frequent aseptic draws.
Reconstitution math
5mg vial (applies to GHRP-2, GHRP-6, hexarelin)
| Bac water added | Concentration | 100 mcg dose | 200 mcg dose |
|---|---|---|---|
| 1 mL | 5 mg/mL | 2 units | 4 units |
| 2 mL | 2.5 mg/mL | 4 units | 8 units |
| 5 mL | 1 mg/mL | 10 units | 20 units |
Community sources cite 1 mL (5 mg/mL) when fewer punctures are preferred, and 2 mL or 5 mL when finer measurement of the small mcg doses is the priority. At 1 mg/mL (5 mL), a 100 mcg dose lands on the clean 10-unit mark.
10mg vial
| Bac water added | Concentration | 100 mcg dose | 200 mcg dose |
|---|---|---|---|
| 2 mL | 5 mg/mL | 2 units | 4 units |
| 4 mL | 2.5 mg/mL | 4 units | 8 units |
The 10mg vial follows the same concentrations as the 5mg vial at double the bacteriostatic water volume.
Step-by-Step Reconstitution
- Allow the vial and the bacteriostatic water to reach room temperature (community sources cite 15-20 minutes out of the refrigerator).
- Wipe both rubber stoppers with a fresh alcohol swab.
- Draw the chosen bacteriostatic water volume into a syringe.
- Insert the needle at an angle so the water runs down the inside glass wall rather than onto the powder.
- Let the powder dissolve, then swirl gently. Do not shake.
- The solution should be clear and colorless; cloudiness or particulate after swirling is cited as a signal to discard.
Storage After Reconstitution
Community sources cite 28 days of refrigerated stability at 2-8 degrees Celsius for reconstituted GHRPs, consistent with the bacteriostatic water's USP multi-dose window. Because GHRPs are dosed multiple times per day, the frequent punctures make aseptic technique especially important. Lyophilized, unreconstituted vials are described as stable for months at freezer temperatures.
Common Mistakes (Community Reports)
These are anecdotal patterns reported in community sources, not clinical findings:
- Reconstituting too concentrated. Reports describe 5 mg/mL solutions making 100 mcg doses hard to draw accurately at only 2 units.
- Frequent punctures without swabbing. Because the vial is accessed 2-3 times daily, reports emphasize swabbing the stopper before every draw to protect the multi-dose window.
- Shaking the vial. Foaming and degradation concerns are cited; gentle swirling is the consistently described method.
Bottom Line
GHRP-2, GHRP-6, and hexarelin share the same reconstitution math. For a 5mg vial, community sources cite 1 mL (5 mg/mL), 2 mL (2.5 mg/mL), or 5 mL (1 mg/mL) — the higher volumes make small 100-300 mcg doses easier to measure. Reconstituted solution holds for the 28-day refrigerated multi-dose window, with aseptic technique especially important given multiple daily draws.