Hexarelin
A potent synthetic growth hormone-releasing peptide that works on the ghrelin receptor. People run it for a short, sharp pulse of growth hormone, aiming at lean mass, recovery, and body composition, usually in short cycles because it loses its punch fast.
Where to buy Hexarelin, cheapest first.
Prices from 3 vendors across the market. We link straight to each vendor’s product page and grade vendors on public lab data, so you’re not just chasing the lowest number.
Hexarelin
What Hexarelin actually does.
The simple version first, then a little more for the curious. No biochem degree required.
It hits the same receptor as ghrelin, your hunger and growth hormone signal, telling your pituitary to release a strong burst of growth hormone, which then nudges IGF-1 up.
How it works
Hexarelin is a synthetic GHRP that binds the growth hormone secretagogue receptor (GHS-R1a), the same receptor ghrelin uses. That triggers the pituitary to release a pulse of growth hormone, with a downstream rise in IGF-1. It binds far more tightly than ghrelin itself.
Where it acts
It works at the pituitary to drive the GH pulse, but it also binds the CD36 receptor in heart tissue, which is why animal studies have looked at it for cardiac protection separate from its GH effect. The GH pulse itself acts body-wide.
What people notice
People run it for leaner body composition, recovery, and the appetite bump that comes with the ghrelin pathway. The catch most people report is that the GH response fades within a few weeks of steady use, so it is run in short blocks.
Honest caveat: most of the strength data here is short human GH-response studies and animal work, not long-term outcome trials in healthy adults. The fast desensitization is real and well documented. Hexarelin is not an approved medicine and is sold strictly for research use only. None of this is medical advice, talk to a licensed provider before starting anything.
How to take it.
Hexarelin is an injection, given subcutaneously into fat with a tiny insulin needle. It isn't an oral peptide, so the injectable form is what people run. Timing matters more than with most peptides: it works best on an empty stomach, away from food. The routine is below; for cycling and timing, see the full guide.
Reconstitute the vial
Add bacteriostatic water down the side of the vial (a 5mg vial + 2mL = 2.5mg/mL). Let it dissolve. Swirl gently, don't shake.
Draw your dose
On a U-100 insulin syringe, pull to your unit mark. 100mcg at 2.5mg/mL is 4 units (0.04mL). Use the calculator if you're unsure.
Pinch and inject
Swab with alcohol, pinch a bit of fat, insert at 45–90°, push slowly. The belly is simplest. Dose on an empty stomach, at least 30 minutes before food, for the cleanest GH pulse.
Rotate your sites
Move to a different spot each time so no area gets sore or lumpy. Store the vial in the fridge between doses.
The easiest spots are the belly (about 2 inches either side of the navel), the love handles, the front of the thigh, and the back of the upper arms. Rotate every injection.
Don't do the math, let the calculator do it.
This is Hexarelin's typical setup, already worked out. Change any value and the draw updates instantly.
Typical Hexarelin dose: about 100 mcg per shot, once or twice a day, on an empty stomach. It is run in short cycles of roughly 6 to 8 weeks, then time off, because the GH response fades fast with continuous use.
How to cycle Hexarelin.
How long people run Hexarelin, when to take a break, and the honest reasoning behind it.
Cycled short because the GH response fades fast with continuous use.
A cycle just means a defined run of time on the peptide, followed by a break. For Hexarelin this is not optional, it is the whole point. The growth hormone secretagogue receptor desensitizes faster with Hexarelin than with any other GHRP, so the GH response can shrink within 2 to 4 weeks of steady use.
Because of that, people run short blocks, commonly 6 to 8 weeks, then take a real break of at least 4 weeks to let the receptor reset. Running it continuously does not give you more growth hormone, it gives you less, as the receptor stops responding.
- Keep cycles short, roughly 6 to 8 weeks on, which is deliberately shorter than gentler GHRPs like Ipamorelin.
- Take a real break, at least 4 weeks off, so receptor sensitivity returns to baseline before another run.
- Do not chase it with more dose when the effect fades mid-cycle. That is the desensitization talking, and a higher dose mostly adds side effects.
Want the full picture, on and off periods, the washout, stacking, and keeping your results? Read how peptide cycling works →
What's actually in the vial.
These link to each vendor's general lab-results page. We don't run the labs ourselves and we don't show a purity number unless it's printed on a certificate we link, so you can open the document and check it against the batch yourself.
| Vendor | Purity (per COA) | Batch / report | Certificate |
|---|---|---|---|
| Penguin Peptides | see lab page | not shown | Lab results ↗ |
What people pair it with.
Hexarelin is often paired with a GHRH peptide, because the two pathways push growth hormone harder together than either does alone.
Bigger GH pulse
The classic secretagogue pairing. Hexarelin hits the ghrelin receptor while CJC-1295 hits the GHRH receptor, and the two pathways add up at the pituitary for a larger pulse than either alone. Often injected together on an empty stomach.
View stack →Lean mass & repair
Pairs the GH pulse with a soft-tissue repair base. Hexarelin drives recovery and body composition while BPC-157 and TB-500 cover tendon, ligament, and whole-body healing during a hard training block.
View stack →Gentler GH stack
A milder GHRH option in place of CJC-1295. Sermorelin nudges the GHRH side while Hexarelin supplies the strong GHRP pulse, for people who want the synergy with a shorter-acting partner.
View stack →In the same corner.
Other growth hormone peptides people compare against Hexarelin.
Questions, answered straight.
Is Hexarelin legal?
Hexarelin isn't an approved drug, and it isn't sold for human use. The vendors we compare offer it strictly for research use only. It's also on WADA's prohibited list as a growth hormone secretagogue, so competing athletes should steer clear. Rules vary by country, so check what applies where you are.
What does research use only actually mean?
It means the product is sold for laboratory and research purposes, not as a supplement or medicine for people. It hasn't been reviewed or approved for human use by the FDA. We aggregate prices and public lab data so you can see the landscape; what you do with that is between you and a licensed provider.
Why does it stop working after a few weeks?
Hexarelin desensitizes the growth hormone secretagogue receptor faster than other GHRPs, so the GH response can fade within 2 to 4 weeks of steady use. That's why people run it in short cycles of roughly 6 to 8 weeks, then take a real break of 4 weeks or more to let the receptor reset.
How often do people dose it?
A common pattern is 100 mcg once or twice a day, on an empty stomach, in a cycle of about 6 to 8 weeks. People run it in cycles rather than continuously because of the fast desensitization. Use the calculator to turn your vial and dose into exact units.
How is it different from Ipamorelin?
Both are GHRPs that hit the same receptor, but Hexarelin is more potent and comes with more appetite, water retention, and cortisol or prolactin effect. Ipamorelin is the cleaner, gentler option. People who want a strong, short GH pulse reach for Hexarelin; people who want a mild daily peptide pick Ipamorelin.