Ipamorelin vs Hexarelin: the honest comparison
Hexarelin produces the largest GH pulse of any GHRP; Ipamorelin produces the cleanest. Hexarelin has the strongest efficacy for acute research protocols but meaningful downregulation risk on long cycles. Ipamorelin is the right default for anything multi-month.
Side-by-side facts
| Ipamorelin | Hexarelin | |
|---|---|---|
| Class | Ghrelin receptor agonist / GHRP (growth-hormone-releasing peptide) | Growth-hormone-releasing peptide (GHRP-6 analog) |
| Half-life | Approximately 2 hours | Approximately 70 minutes |
| Typical dose | 100–300 mcg per injection, 1–3x daily | 100 mcg, 1–3x daily |
| Category | Growth hormone axis | Growth hormone axis |
| FDA status | Not FDA approved. Research use only. | Not FDA approved. Research use only. |
| Storage | Lyophilized refrigerated. | Lyophilized refrigerated. |
What they have in common
Both are GHRPs acting on the GHS receptor. Both trigger pituitary GH release. Both pair with a GHRH (like CJC-1295 or Sermorelin) for synergistic pulses.
When to pick Ipamorelin
Pick Ipamorelin for anything longer than a few weeks. It does not appreciably raise cortisol or prolactin and does not produce meaningful receptor desensitization at normal doses — built for repeated or long-duration use.
When to pick Hexarelin
Pick Hexarelin for short research protocols where peak GH elevation is the primary goal. Hexarelin produces a significantly larger GH pulse than Ipamorelin at equimolar doses, but it also more reliably raises cortisol and prolactin and accelerates receptor desensitization.
Can you stack them?
No — both are GHRPs on the same receptor. Alternating between them across cycles is plausible; concurrent use is not.
The two compounds
Track either compound on iPhone
Peptide Protocol schedules doses, calculates reconstitution, and logs side effects for both — on iPhone, free to download.
See the app →Frequently asked questions
What is the main difference between Ipamorelin and Hexarelin?
Peak vs clean. Hexarelin is the strongest GHRP; Ipamorelin is the cleanest. Hexarelin is a sprint compound, Ipamorelin is a marathon compound.
Can you stack Ipamorelin and Hexarelin?
No — both are GHRPs on the same receptor. Alternating between them across cycles is plausible; concurrent use is not.
Which is better, Ipamorelin or Hexarelin?
Hexarelin produces the largest GH pulse of any GHRP; Ipamorelin produces the cleanest. Hexarelin has the strongest efficacy for acute research protocols but meaningful downregulation risk on long cycles. Ipamorelin is the right default for anything multi-month.
When should I pick Ipamorelin?
Pick Ipamorelin for anything longer than a few weeks. It does not appreciably raise cortisol or prolactin and does not produce meaningful receptor desensitization at normal doses — built for repeated or long-duration use.
When should I pick Hexarelin?
Pick Hexarelin for short research protocols where peak GH elevation is the primary goal. Hexarelin produces a significantly larger GH pulse than Ipamorelin at equimolar doses, but it also more reliably raises cortisol and prolactin and accelerates receptor desensitization.
Are Ipamorelin and Hexarelin FDA approved?
Ipamorelin: Not FDA approved. Research use only. — Hexarelin: Not FDA approved. Research use only.
Educational use only. Peptide Protocol is an informational tool. Nothing on this page constitutes medical advice. Many peptides are prescription-only or restricted in your jurisdiction. Always consult a licensed healthcare professional before injecting any compound.