GHRP-1 10 mg vial
How much bacteriostatic water to add to a 10 mg vial of GHRP-1, the syringe units for each common dose, and how many doses the vial holds.
- Water
- 5 mL
- Strength
- 2 mg/mL
- Common dose
- 100 mcg
- Draw
- 5 units0.05 mL
- Doses per vial
- 100
The short answer
Mixed with 5 mL of bacteriostatic water, a 10 mg vial of GHRP-1 holds 2 mg/mL. A 100 mcg dose is then 5 units (0.05 mL) on a U-100 insulin syringe, and the vial holds about 100 doses of that size. Taken 2× per day, it lasts about 7.1 weeks.
How much water
The water only sets the strength; the dose and the number of doses in the vial stay the same. Draws are on a U-100 insulin syringe, where 1 unit is 0.01 mL.
| Water added | Strength | Per syringe unit | Draw for 100 mcg |
|---|---|---|---|
| 2.5 mL | 4 mg/mL | 40 mcg | 2.5 units (0.025 mL) |
| 3 mL | 3.333 mg/mL | 33.3 mcg | 3 units (0.03 mL) |
| 5 mL | 2 mg/mL | 20 mcg | 5 units (0.05 mL) |
Dose chart
Syringe units for each common dose at each water volume. Select a cell to open it in the calculator.
| Dose | Water added | ||
|---|---|---|---|
| 2.5 mL | 3 mL | 5 mL | |
| 100 mcg | |||
| 150 mcg | |||
| 200 mcg | |||
| 250 mcg | |||
| 300 mcg | |||
Draws over 100 units show in mL. Faded values are under 2 units, which is hard to measure. Check that your vial holds the larger volumes.
Where the doses come from
- Trial An IV bolus of 1 mcg/kg in healthy young men and women released growth hormone strongly, comparable to GHRP-2 and more than GHRH alone.
- Trial A 100 mcg IV bolus raised growth hormone within about 20 minutes in healthy adult women; the rise was blunted in women who were breastfeeding.
- Community 100–150 mcg per injection, 1–3× daily on an empty stomach, as with the other GHRPs; GHRP-1 is sold and used far less than GHRP-2 or GHRP-6.
Doses are what labels, trials or community reports reference, not recommendations. GHRP-1’s page has the cycle, side effects, cautions and sources.
Mixing and storage
- PrepareLet a refrigerated vial come to room temperature, and wipe both stoppers with an alcohol swab.
- Add 5 mLDraw 5 mL of bacteriostatic water and let it run slowly down the inside wall of the vial.
- Swirl, don’t shakeSwirl gently until the powder dissolves and the liquid is clear.
- Label itWrite the date and the strength, 2 mg/mL, on the vial.
Storage: Powder: frozen or refrigerated. Mixed: 2–8 °C, use within about 3–4 weeks.
The reconstitution guide covers each step, and the units page explains syringe markings.
Questions
How much water do I add to a 10 mg vial of GHRP-1?
There’s no single right amount: the water only sets the strength. With 5 mL of bacteriostatic water, a 10 mg vial holds 2 mg/mL. With 2.5 mL it’s 4 mg/mL; with 3 mL it’s 3.333 mg/mL. Less liquid makes each dose a smaller draw; more makes small doses easier to measure.
How many units is 100 mcg of GHRP-1?
With 5 mL in a 10 mg vial, 100 mcg is 5 units (0.05 mL) on a U-100 insulin syringe. With 2.5 mL, 2.5 units (0.025 mL); with 3 mL, 3 units (0.03 mL).
How many doses are in a 10 mg vial of GHRP-1?
About 100 doses of 100 mcg, or 40 of 250 mcg or 33 of 300 mcg. Taken 2× per day at 100 mcg, it lasts about 7.1 weeks.
How long does a mixed vial of GHRP-1 keep?
Powder: frozen or refrigerated. Mixed: 2–8 °C, use within about 3–4 weeks.
Other vial sizes
Sources
- Bowers et al., structure and kinetics of GH-releasing peptides, including GHRP-1 in people (J Pediatr Endocrinol 1993) PMID 8374685
- Laron et al., GH-releasing activity of GHRP-1 in children and adolescents (Acta Endocrinol 1993) PMID 8279223
- Mericq et al., GHRP-1 and GHRH in GH-deficient children (J Clin Endocrinol Metab 1995) PMID 7745018
- de Zegher et al., GHRP-1 bolus and blunted GH response after childbirth (J Clin Endocrinol Metab 1998) PMID 9435424
- Semenistaya et al., urine metabolites after nasal GHRP-1, GHRP-2, GHRP-6, hexarelin and ipamorelin (Drug Test Anal 2015) PMID 25869809
- WADA 2026 Prohibited List, section S2.2.4 (GHRP-1 named)
The math on this page uses the doses and storage on GHRP-1’s page.