GHRP-2 reconstitution calculator

GHRP-2 at a glance

5mg vial + 2mL BAC water = 4 units = 100mcg — Frequency: once or 2-3x daily — Best taken: morning, fasted

Full GHRP-2 dosing reference — reconstitution per vial size, dose-to-units table, side effects and sources.

What it does

• Growth hormone secretagogue (GHS) that also stimulates some appetite (ghrelin-mimetic).
• Studied for muscle growth and wound healing alongside its GH-releasing effects.
• Can raise cortisol and prolactin more than newer secretagogues like Ipamorelin — a common tradeoff discussed in the community.

Raising growth hormone can unmask previously hidden hypothyroidism and shift how the body converts thyroid hormone — that is documented in hypopituitary patients on growth hormone replacement, not in healthy people using secretagogues, and how often it matters here is unknown. GH also raises blood sugar, working against insulin and other diabetes medications. Talk to your prescribing doctor before combining, especially if you take thyroid or diabetes medication.

Notes

All vial sizes reconstitute to 2.5mg/mL (25mcg/unit) so the syringe reads the same regardless of size. Community protocols commonly cycle GH-secretagogue peptides like this one — typically 8-12 weeks on followed by 4 weeks off (up to 12 weeks off after higher-dose runs) — since continuous use may reduce pituitary receptor sensitivity over time. This app defaults to daily/ongoing use; whether and when to take a break is a question for your prescriber.

Side Effects

• Increased hunger, milder than GHRP-6.
• Water retention, mild joint discomfort early on.
• Raised cortisol and prolactin at higher doses.
• Injection site irritation.

GHRP-2 vial sizes and concentrations

Standard water for each GHRP-2 vial size in the Dosify Me data, and the concentration it gives. One unit is 0.01 mL on a U-100 insulin syringe.

Worked example for GHRP-2

1. The example vial: 5 mg of GHRP-2, mixed with 2.00 mL of bacteriostatic water.
2. Concentration: 5 mg ÷ 2.00 mL = 2.5 mg/mL.
3. One syringe unit is 0.01 mL, so it holds 2.5 mg/mL × 0.01 mL = 0.025 mg (25 mcg).
4. Example quantity: 100 mcg = 0.1 mg.
5. Volume: 0.1 mg ÷ 2.5 mg/mL = 0.04 mL.
6. Syringe reading: 0.04 mL × 100 = 4 units.

Label numbers from the Dosify Me data, used to show the arithmetic. Not a recommendation of any quantity.

Frequently asked

How many units is 100 mcg of GHRP-2?

At 2.5 mg/mL (the concentration every vial size mixes to), 100 mcg of GHRP-2 is 4.0 units on a 100-unit insulin syringe (0.040 mL).

How many units is 200 mcg of GHRP-2?

At 2.5 mg/mL (the concentration every vial size mixes to), 200 mcg of GHRP-2 is 8.0 units on a 100-unit insulin syringe (0.080 mL).

How many units is 300 mcg of GHRP-2?

At 2.5 mg/mL (the concentration every vial size mixes to), 300 mcg of GHRP-2 is 12.0 units on a 100-unit insulin syringe (0.120 mL).

How much bacteriostatic water do I add to a 5 mg vial of GHRP-2?

2.00 mL, which gives 2.5 mg/mL. Other vial sizes use proportionally more or less water so the syringe reads the same.

How often is GHRP-2 taken?

Once or 2-3x daily. Morning, fasted Typical cycle: ~8 weeks on, ~4 weeks off; repeat 2×/year.

Related pages and guides

• GHRP-2 dosing reference
• How many units is 250 mcg?
• How much bacteriostatic water for a 5 mg vial?
• U-100 vs U-50 insulin syringe for peptides
• How to track peptide doses
• All peptide guides

Other calculators

General peptide calculator · BAC water calculator · Peptide dosing chart · How to reconstitute peptides · mcg to units chart