Hexarelin dosage
Hexarelin is the strongest of the GHRP family per dose: in a 1994 study of healthy volunteers, 1 mcg/kg by IV released about twice the GH of GHRH, and 2 mcg/kg more again. It also raises cortisol and prolactin, and the GH response fades within 1 to 2 weeks of daily use. Users commonly inject 100 to 200 mcg under the skin one to three times daily in short cycles. It was never approved.
Basis: published study (Ghigo et al., JCEM 1994, 12 healthy volunteers, IV and subcutaneous). about 70 to 140 mcg for a 70 kg adult; subcutaneous bioavailability was high
- How often
- once to three times daily
- When
- fasted, bedtime first; morning or post-workout for extra doses
- How long
- short: GH response fades within 1 to 2 weeks of daily dosing, so community cycles are 4 to 8 weeks with breaks, or rotated with other GHRPs
- Route
- subcutaneous, abdomen
- Storage
- lyophilized: fridge or freezer; reconstituted: fridge, commonly used within 4 weeks (commonly reported)
Dose ranges by source
| Range | Per | Basis | Note |
|---|---|---|---|
| 1 mcg/kg to 2 mcg/kg | single dose | published study (Ghigo et al., JCEM 1994, 12 healthy volunteers, IV and subcutaneous) | about 70 to 140 mcg for a 70 kg adult; subcutaneous bioavailability was high |
| 100 mcg to 200 mcg | dose, 1 to 3 times daily | commonly reported | fasted; most users keep it to 1 or 2 doses because of desensitization |
Titration schedule
Step up on this schedule; stay a step longer if side effects are rough.
| Weeks | Dose |
|---|---|
| 1 | 100 mcg at bedtime |
| 2-8 | 100 to 200 mcg, 1 to 3 times daily |
Hexarelin dose to units chart
2 mg vial + 1 mL bacteriostatic water = 2 mg/mL (20 mcg per unit on a U-100 insulin syringe). 2 mg + 1 mL = 2 mg/mL, so 100 mcg = 0.05 mL = 5 units; 200 mcg = 10 units. A 5 mg vial with 2.5 mL gives the same 2 mg/mL.
| Dose | mL | Units (U-100) | Doses per vial |
|---|---|---|---|
| 0 mcg | 0 | 0 | Infinity |
| 1 mcg | 0.0005 | 0.05 | 2000 |
| 2 mcg | 0.001 | 0.1 | 1000 |
Different vial or water? Full 2 mg + 1 mL table or set your own numbers below.
Commonly stacked with
- CJC-1295 (no DAC) 100 mcg to 200 mcg
- Sermorelin 30 mcg/kg
Side effects
- cortisol and prolactin increase
- water retention
- strong hunger
- flushing
- tingling hands
- fatigue
- injection site redness
Hexarelin dosage questions
How much hexarelin should I take?
The human studies used 1 to 2 mcg/kg, about 70 to 140 mcg for a 70 kg adult, as a single dose. Users commonly inject 100 to 200 mcg one to three times daily, fasted. On a 2 mg vial in 1 mL, 100 mcg is 5 units.
Why does hexarelin stop working?
Daily dosing attenuates the GH response within 1 to 2 weeks in the published studies, with partial recovery after a few days off. That is why community cycles are short, 4 to 8 weeks, and why many rotate it with ipamorelin or GHRP-2 rather than run it alone for months.
Hexarelin vs ipamorelin?
Hexarelin releases more GH per dose but also raises cortisol and prolactin and causes hunger; ipamorelin releases less and leaves those hormones mostly alone. For a long cycle most users pick ipamorelin and save hexarelin for short pushes. Doses are similar, 100 to 300 mcg.
Sources
- Ghigo et al., J Clin Endocrinol Metab 1994, Growth hormone-releasing activity of hexarelin after intravenous, subcutaneous, intranasal, and oral administration in man (PMID 8126144)
- Arvat et al., Peptides 1997, Effects of GHRP-2 and hexarelin on GH, prolactin, ACTH and cortisol in man (PMID 9285939)
- Peptide Protocol Wiki, Hexarelin overview and protocol quick reference
Brands we recommend for Hexarelin. We are independent and have no affiliation with any brand: no affiliate links, no referral codes, no paid placements. These are the suppliers whose testing and certificates hold up when we check them.
- Licensed Peptides two accredited labs on every lot, certificates public, card and Apple Pay checkout
- Core Peptides long track record, public certificates, wide catalog
- Ascension Peptides public third-party testing, clear pricing
This page is an educational summary of published labels, trials and commonly reported use. It is not medical advice and does not replace a clinician.