GHRP-2 Dosage Calculator & Research Doses

1Set Up Your Mix

1.667 mg/mL · 1667 mcg/mL

1. Pick your peptide

2. How much peptide is in the vial? It's printed on the label — usually something like 5 mg

3. How much water are you adding? More water makes each dose easier to measure

4. How much do you want per dose?

Your Answer — GHRP-2

5 mg in 3 mL

6Draw To This Line

0.06That's This Many mL

50Doses In The Vial

5 mg ÷ 3 mL = 1.667 mg/mL → 100 mcg ÷ 1.667 mg/mL = 0.06 mL → × 100 = 6 units

Looks good. Draw to 6 units on a 1 mL syringe. That is an easy amount to measure, and this vial gives you 50 doses.

When to dose

Time of dayBefore bed, or first thing in the morning — not during the day.

FoodFasted. Nothing to eat for about 2 hours before, and wait 20–30 minutes after.

Food, and carbohydrate in particular, raises insulin and blunts the growth-hormone pulse these compounds are meant to trigger. The two windows where you are naturally fasted and GH release is highest are early sleep and first thing on waking, which is why those are the only two sensible times.

2Week-By-Week Plan — GHRP-2

Start low, work up

When	Dose	How Often	How Many mL	Draw To	Number Of Doses	Peptide Used
Weeks 1–2	100 mcg	daily	0.06 mL	6 u	14	1.4 mg
Weeks 3–4	200 mcg	daily	0.12 mL	12 u	14	2.8 mg
Week 5 onward per 4 weeks from here on	300 mcg	daily	0.18 mL	18 u	28	8.4 mg

Time until the top dose

4 weeks

Peptide used getting there

4.2 mg

Vials you'll need

1 × 5 mg

Once you're at the top dose

8.4 mg / 4 wk · 1.68 vials

Where this plan came from

Built from this peptide's dose range

Where this came from: Built from the doses listed for this peptide below — start at the lowest and step up, using the studies cited on this page. Nobody publishes a week-by-week plan for this peptide, so we built one: the doses are the researched ones shown below, and we simply put them in order from lowest to highest. Treat it as a starting point, not an official schedule.

3Common Doses — GHRP-2

worked out for your mix

Level	Dose	How Often	How Many mL	Draw To	Doses In Vial
Low reported	100 mcg	1–3× daily	0.06 mL	6 u	50 doses
Standard	200 mcg	1–3× daily	0.12 mL	12 u	25 doses
Upper reported	300 mcg	1–3× daily	0.18 mL	18 u	16 doses
Diagnostic dose	100 mcg single	diagnostic	Set by body weight — can't be turned into a single amount to draw

Please read this. These numbers come from published research. They are here as reference, not as instructions. A lot of them come from lab studies rather than studies in people, and some of these peptides have never been given to a person at all.

About GHRP-2

GH Secretagogue

Also known as

Pralmorelin, KP-102

Class

GH Secretagogue

Route

Subcutaneous

Half-life

~30 min

Evidence tier

Clinical

A growth hormone-releasing peptide with an approved diagnostic use in Japan for GH deficiency testing. Less receptor-selective than ipamorelin — raises prolactin and cortisol somewhat.

Buy GHRP-2

Research Equipment

SyringesU-100 insulin · 1 mL · 29–31G

Alcohol wipes70% isopropyl prep pads

Serum base — for topical mixesHyaluronic acid serum for mixing peptides into a serum

Electric cooler caseTSA-approved travel cooler — keeps mixed vials at fridge temperature

Storage caseHard carry case for vials

Paid affiliate links.

Common Questions — GHRP-2

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

Adding 3 mL of bacteriostatic water to a 5 mg vial gives 1.67 mg/mL. That is the mix every number on this page is worked out from — change the water figure in the calculator and all the draw amounts update.

What dose of GHRP-2 is used in research?

Published and reported figures for GHRP-2 run from 100 mcg to 300 mcg, typically 1–3× daily. This site lists each figure with the source it came from rather than giving a single recommended number.

How many units on the syringe is a 100 mcg dose of GHRP-2?

At 1.67 mg/mL, a 100 mcg dose is 6 units on a 1 mL U-100 insulin syringe. One vial at that mix gives about 50 doses.

How strong is the evidence behind these GHRP-2 doses?

GHRP-2 is graded clinical. Human trial or approved-label dosing has been published for this compound. We grade every compound on this site so you can weigh the numbers accordingly — the full method is on our editorial policy page.

Where These Numbers Come From

Clinical — Human trial or approved-label dosing published

GHRP-2 as a diagnostic agent for growth hormone deficiency Chihara K, et al. Journal of Clinical Endocrinology & Metabolism, 2007

Human diagnostic dosing and GH response curves.

Find on PubMed ↗

Growth hormone-releasing peptides — mechanism and clinical potential Bowers CY. Cellular and Molecular Life Sciences, 1998

Review by the researcher who developed the GHRP series.

Find on PubMed ↗

Newest Studies — —

—

Not reviewed by us. This list is pulled straight from Europe PMC as papers are published. Nobody has checked whether these are any good, or whether they change anything above. The dose numbers on this page only ever change after a person reviews the evidence.

GHRP-2 Dosage & Reconstitution