ModerateCaution
Berberine
Berberine may lower glucose while hexarelin can alter GH-axis glucose regulation.
Recommendation: Avoid unsupervised stacking and monitor glucose in any medically supervised context.
Hexarelin
Peptide ·Insufficient evidence ·Reviewed May 2026
Hexarelin is a potent synthetic growth hormone secretagogue in the GHRP class that activates ghrelin or growth hormone secretagogue receptors and can raise GH, cortisol, and prolactin. It is not FDA-approved for human use, not approved for anti-aging or body composition, and long-term safety data are limited. Concerns include desensitization, glucose intolerance, edema, cortisol or prolactin effects, pituitary-axis disruption, injection risks, and WADA-prohibited status.
What it's good for
What to watch for
- Water retention
- Tingling or numbness
- Headache
- Active malignancy
- Pregnancy and breastfeeding
The bottom line
Evidence rating insufficient. Most-documented uses: acutely stimulates gh release in research settings, used to study gh, cortisol, and prolactin responses, preclinical cardioprotective mechanisms have been explored. 3 sources indexed (1995–2025), with 3 interaction records on file.
The science
How it works, mechanistically.
Core mechanism
Hexarelin activates GHS-R1a receptors in the pituitary and hypothalamus, producing a strong GH pulse and secondary IGF-1 effects if repeated stimulation is effective. Compared with more selective secretagogues, it is more likely to raise ACTH, cortisol, and prolactin. Some preclinical work also links hexarelin to CD36 and cardiometabolic pathways, but these findings do not establish safe human wellness use.3,1
Class
Potent experimental GH secretagogue
Found in food
None
Low-status signs
No hexarelin deficiency exists
Dosing
Dosing & protocol.
Common range
No FDA-approved human dose; published endocrine studies used supervised experimental doses
Recommended form
Not recommended as a supplement; research protocol only
Peptide use in studies is parenteral. Research-grade injection is unsafe.2
Forms
Forms & what to buy.
Ranked by evidence and value.
Lyophilized Research Peptide Recommended
Not an approved drug product and not appropriate for human injection. Sterility and identity cannot be assumed.
Clinical Research Injectable
Only appropriate under an approved protocol. Requires medical oversight.
Cost
What it actually costs.
Real-world pricing across three quality tiers. Assumes Research peptide vial.
BudgetBest value
$60 /mo
$2.00 per dose
Mid
$150 /mo
$5.00 per dose
Premium
$390 /mo
$13.00 per dose
Research-market pricing is not a recommendation for human use. Updated 2026-06-04.
Goals
Goal-based dosing.
Endocrine Response Research
Dose: Protocol-specific; no approved consumer dose2
Timing: Research protocol only
Acute hormone response is not a clinical benefit endpoint.
Body Composition or Anti-Aging
Dose: No FDA-approved dose
Timing: Not applicable
Long-term safety and efficacy are not established.
Cardioprotection Claims
Dose: No approved dose
Timing: Not applicable
Cardioprotective claims are largely preclinical and not a reason for human self-use.
Lab work
Markers to track.
What to test, the optimal window inside the conventional range, and how long a response takes.
Insulin-Like Growth Factor 1 IGF-1
May increase with GH-axis stimulation, but response and safety are not established.2
Optimal
80–250 ng/mL
Conventional
50–300 ng/mL
Responds in
4-8 weeks if medically monitored
50optimal300
Do not use for unsupervised peptide self-treatment.
Fasting glucoseHbA1cProlactin
Morning Cortisol Cortisol
May increase acutely in endocrine studies.2
Optimal
7–18 mcg/dL
Conventional
5–25 mcg/dL
Responds in
As clinically indicated
5optimal25
Evaluate adrenal symptoms through an endocrinologist.
ACTHProlactinIGF-1
Why people use it
Symptoms it's matched to.
Where this appears in the symptom-to-supplement map, ranked by relevance.
Low IGF-1 on labs
16% relevance
Acutely stimulates GH, but not approved for IGF-1 treatment.2
HormoneInsufficient evidenceNot recommended
Requires endocrine diagnosis.
Poor muscle recovery
6% relevance
Performance claims are extrapolated from GH-axis activation.
AthleticInsufficient evidenceNot recommended
WADA-prohibited and not FDA-approved.
Fluid retention
1% relevance
GH secretagogues may worsen edema; this is a risk rather than a benefit.1
CardiometabolicInsufficient evidenceAvoid
Edema needs medical evaluation.
Safety
Full safety detail.
Side effects
- Water retention
- Tingling or numbness
- Headache
- Flushing
- Injection-site reaction
- Glucose intolerance
- Possible cortisol elevation
- Possible prolactin elevation
Contraindications
Interactions
Interaction records.
ModerateCaution
Alpha-Lipoic Acid
Alpha-lipoic acid can affect glucose handling while hexarelin may worsen glucose tolerance.
Recommendation: Use clinician-guided glucose monitoring if exposure occurs.
InfoCaution
Creatine
Creatine-related water weight can mask edema from GH-axis stimulation.
Recommendation: Monitor swelling, blood pressure, numbness, and joint symptoms.
Sources
Sources, by evidence tier.
Numbered references. Citations throughout the page link here.
Reference material
3- 1The 2026 Prohibited List: International StandardNeeds sourceNo linkWorld Anti-Doping Agency · World Anti-Doping Agency · 2025
GH secretagogues including hexarelin are prohibited for athletes.
- 2Hexarelin-induced growth hormone, cortisol, and prolactin release: a dose-response studyNeeds sourceNo linkArvat E et al. · Journal of Clinical Endocrinology and Metabolism · 1996
Hexarelin induced dose-related endocrine responses including GH, cortisol, and prolactin.
- 3The effect of an opiate antagonist on the hormonal changes induced by hexarelinNeeds sourceNo linkKorbonits M et al. · Clinical Endocrinology · 1995
Naloxone did not block hexarelin-induced hormone changes, supporting a non-opioid GHRP mechanism.
Keep exploring
Deep dives & adjacent profiles.
This page is educational. Do not start, stop, or change a supplement or medication based on it without checking with a qualified healthcare professional.
Use this with your stack
Hexarelin in NutriStack.
Add it to your stack, see how it interacts with everything else you take, and get a Stack Score that updates the moment it does.