The short version.
If you read nothing else, read this. The whole guide in a handful of bullets.
- What it is: Hexarelin is a synthetic growth hormone-releasing peptide (a GHRP) that works on the same receptor as ghrelin to trigger a pulse of growth hormone.
- What people run it for: lean body composition, recovery, and the GH and IGF-1 bump, often during a focused training block.
- Typical dose: about 100 mcg per shot, once or twice a day, on an empty stomach.
- Routes: subcutaneous injection is the standard. It is not a meaningful oral peptide.
- Cycle: short, roughly 6 to 8 weeks on, then 4 weeks or more off, because the GH response desensitizes fast.
- Honest caveat: the human data is mostly short GH-response studies and animal work, not long-term outcome trials. It is sold for research use only, and this is not medical advice.
Quick reference.
| Typical dose | 100 mcg per shot, 1 to 2 times daily |
|---|---|
| Routes | Subcutaneous injection (standard) |
| Frequency | Once or twice a day, on an empty stomach |
| Cycle length | ~6 to 8 weeks on, then 4+ weeks off |
| Best for | Lean mass, recovery, a strong short GH pulse |
What is Hexarelin?
Hexarelin is a short peptide, which simply means a small chain of amino acids, the same building blocks that make up the proteins in your body. It belongs to a family called growth hormone-releasing peptides, or GHRPs, alongside names you may have seen like GHRP-6, GHRP-2, and Ipamorelin.
What it does is mimic ghrelin, the natural hormone behind hunger and growth hormone release. Hexarelin binds the same receptor ghrelin uses, the growth hormone secretagogue receptor, and tells the pituitary gland to release a pulse of growth hormone. It actually grips that receptor far more tightly than ghrelin itself, which is part of why it is considered one of the most potent peptides in the family.
The version sold by vendors arrives as a freeze-dried white powder in a small sealed vial. It is not a steroid, not testosterone, and not synthetic growth hormone. It does not add GH from outside; it pushes your own pituitary to release more of its own. People reach for it for one theme above all: a strong, short pulse of growth hormone aimed at body composition and recovery.
Worth saying plainly: Hexarelin is not an approved medicine anywhere. It is sold strictly for research use only, and most of the human evidence is short studies measuring the GH response, not long trials measuring muscle, fat, or health outcomes in healthy adults. We get into what that means further down.
How it works in the body.
You do not need a biology degree to follow this. Here is the simple picture, then a little more for the curious.
The core idea is that Hexarelin does not replace your growth hormone, it triggers your own. It works through a few overlapping mechanisms that show up repeatedly in the research.
- Ghrelin receptor activation. Hexarelin binds the growth hormone secretagogue receptor (GHS-R1a), the same one ghrelin uses, and that signal tells the pituitary to release a burst of growth hormone. The appetite bump people notice comes from this same pathway.
- A GH pulse, then IGF-1. The growth hormone it releases then drives a downstream rise in IGF-1, the hormone that does much of the work growth hormone is credited with, including tissue repair and effects on body composition.
- A separate heart pathway. Unusually, Hexarelin also binds the CD36 receptor in heart tissue, which is why animal studies have looked at it for cardiac protection independently of its GH effect. This is research-stage, not a proven human benefit.
How to take it: routes of administration.
Hexarelin is an injectable peptide. It is not a meaningful oral option, so the real choice is just where you inject, and the honest answer is that subcutaneous covers almost everyone. Here is the comparison.
| Route | Typical dose | Absorption | Best for | Difficulty |
|---|---|---|---|---|
| Subcutaneous | 100 mcg | Reliable, systemic | Everyday use | Tiny needle, easy to learn |
| Intramuscular | 100 mcg | Fast, similar effect | No real advantage here | More invasive, rarely needed |
| Oral | Not practical | Very low | Not recommended | Destroyed by digestion |
Subcutaneous injection
The standard route by far. A tiny insulin needle goes into the fat just under the skin, not into muscle. It is quick, nearly painless once you get used to it, and the most common way every GHRP is run. Best done on an empty stomach.
Intramuscular
Technically possible but there is no real reason to do it for a peptide like this. The deeper needle is more uncomfortable and the GH pulse is not meaningfully better than a simple subcutaneous shot. Almost nobody runs Hexarelin intramuscularly.
Oral
Hexarelin is a peptide that does not survive digestion, so there is no practical oral version. If you want a needle-free growth hormone secretagogue, that is a different compound, MK-677, not an oral form of Hexarelin.
Where to inject.
If you go this route, these are the sites people use. Rotate so no single area gets sore.
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.
So which should a beginner pick? For everyone, subcutaneous is the answer: absorption is reliable, the needle is tiny, and there is no benefit to going intramuscular. The thing that matters more than the site is the timing, dosing on an empty stomach so food does not blunt the GH pulse.
Reconstitution: mixing it.
Hexarelin arrives as a dry powder, so before you can inject it you reconstitute it, which just means adding liquid to turn the powder into something you can draw into a syringe. It sounds technical but takes about a minute.
Once it is mixed, the only real question is how many units to draw. Because Hexarelin is dosed in micrograms, not milligrams, the numbers are small and easy to get wrong by hand.
- Use bacteriostatic water, often called BAC water. The small amount of preservative keeps the mixed vial usable for weeks.
- Add the water slowly, down the inside wall of the vial. A common mix is a 5 mg vial plus 2 mL of BAC water, which gives a concentration of 2.5 mg/mL.
- Swirl, do not shake. Gently roll the vial until the powder dissolves. Shaking can damage the peptide.
- Store it in the fridge once mixed, and keep it out of direct light. Use it within about four weeks.
Open the dosage calculator to turn your vial and dose into an exact number of units. As a worked example: a 5 mg vial mixed with 2 mL of BAC water gives 2.5 mg/mL, so a 100 mcg dose is 0.04 mL, which is 4 units on a U-100 insulin syringe, and that vial holds about 25 doses.
Dosing by goal.
There is no single official dose for Hexarelin, because it is not an approved medicine. What follows is the range people commonly run. The defining feature of Hexarelin dosing is that it is small, frequent, timed around food, and deliberately short-lived.
Standard dose
The common pattern is about 100 mcg per shot, taken once or twice a day. Some run a third dose, but more is not automatically better with GHRPs, and higher doses bring more of the appetite, water, and cortisol effects without a proportional gain in growth hormone.
Timing around food
Hexarelin works best on an empty stomach. Food, especially carbs and fats, blunts the GH pulse. People aim for at least 30 minutes before eating and a couple of hours after, often first thing in the morning, before training, or before bed.
Stacked with a GHRH
Hexarelin is frequently paired with a GHRH peptide like CJC-1295 or Sermorelin. The two work on different receptors and add up at the pituitary, so people inject them together for a bigger pulse than either gives alone.
Once or twice a day, on an empty stomach. This is the dose most protocols are built around.
Same Hexarelin dose, injected alongside CJC-1295 or Sermorelin for a larger combined GH pulse.
Cycling and timing.
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.
Stacking Hexarelin.
Hexarelin is often run with a partner, because pairing a GHRP with a GHRH pushes growth hormone harder 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. People inject them 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 →See full recipes, dosing, and how people run them on the stacks page.
Side effects and safety.
In the reports we see, Hexarelin is described as effective but less clean than the gentler GHRPs, because the same ghrelin pathway that drives the GH pulse also drives appetite and other hormones. The effects people mention most often are:
- Increased appetite, sometimes sharply, because it works on the ghrelin (hunger) receptor.
- Water retention and a temporary puffy or bloated feeling, especially early in a cycle.
- Tingling or numbness in the hands, and in some people carpal tunnel-like symptoms, a known growth hormone effect.
- Raised cortisol and prolactin, which can show up as fatigue, lethargy, or low libido. This is more pronounced than with Ipamorelin.
Who should be cautious.
Some people have clear reasons to be extra careful, or to avoid Hexarelin entirely until they have spoken with a licensed provider.
- Pregnant or breastfeeding. There is no safety data here, so this is a hard avoid.
- A history of cancer, or active cancer. Because Hexarelin raises growth hormone and IGF-1, which can drive cell growth, caution is widely advised. This is a conversation for an oncologist, not a forum.
- Diabetes or blood sugar problems. Growth hormone affects insulin sensitivity, so anyone managing blood sugar should talk to a provider first.
- Competing athletes. Hexarelin is banned by WADA and will show up as a prohibited substance.
And the universal one: whoever you are, talk to a licensed healthcare provider before starting Hexarelin. This guide is educational, not a substitute for personalized medical advice.
Where to buy it safely.
This is where a lot of beginners get burned, because peptide quality varies wildly between vendors and the cheapest vial is not always the real deal. Our honest take: do not shop on price alone, shop on price plus independent lab data.
- Compare vendors side by side. Price ranges are wide, and the difference between the lowest and highest listing can be large for the exact same compound.
- Look for recent third-party lab tests. The gold standard the community looks for is a recent Janoshik certificate of analysis showing purity for the batch you are actually buying.
- Favor recent COAs. An old lab result on a different batch tells you little. The fresher the test, the more it means.
- Be skeptical of suspiciously cheap listings with no testing behind them.
That is exactly the comparison we put together. On our Hexarelin product page you can compare vendor prices, see which batches have public lab data, and view the grades we assign from that data. From there you can head to the buy page to line up your options.
Questions, answered straight.
Is Hexarelin legal?
Hexarelin is not an approved drug and is not sold for human use. The vendors we compare offer it strictly for research use only. It is 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.
Why does Hexarelin have to be cycled?
It desensitizes the growth hormone secretagogue receptor faster than any other GHRP, so the GH response can fade within 2 to 4 weeks of continuous use. People run short blocks of about 6 to 8 weeks, then take at least 4 weeks off so the receptor resets. Running it nonstop gives you less growth hormone, not more.
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 you can run longer. People who want a strong, short GH pulse reach for Hexarelin; people who want a mild daily peptide pick Ipamorelin.
Why does it have to be on an empty stomach?
Food, especially carbohydrates and fats, blunts the growth hormone pulse. To get the cleanest response, people dose at least 30 minutes before eating and a couple of hours after a meal, often in the morning, before training, or before bed.
Should I stack it with CJC-1295?
Many people do. Hexarelin works on the ghrelin receptor and CJC-1295 works on the GHRH receptor, so the two add up at the pituitary for a bigger GH pulse than either gives alone. They are commonly injected together on an empty stomach. As always, this is research-use territory, not a medical recommendation.