Shop by goal

Popular compounds

GHK-Cu

Retatrutide

Tirzepatide

Semaglutide

All bestsellers →

Research resources

Certificates of Analysis

Hexarelin vs Ipamorelin: Potency Against Selectivity

Q: Is hexarelin or ipamorelin better?

They trade off potency against selectivity. Hexarelin is the stronger GH releaser and uniquely engages cardiac CD36, but raises cortisol/prolactin somewhat and desensitises faster. Ipamorelin is the cleaner, selective option with negligible cortisol/prolactin and slower desensitisation. Research choice depends on whether potency or a clean signal matters more. Both sold for research use only.

Q: What is the difference between hexarelin and ipamorelin?

Both are ghrelin-receptor (GHSR) agonists that release growth hormone. Hexarelin is a more potent GHRP-6-derived peptide that also activates cardiac CD36 (a cardioprotection research angle), but elevates cortisol and prolactin at higher amounts and downregulates the receptor faster. Ipamorelin is selective: strong GH pulse, minimal secondary hormones, slower desensitisation.

Q: Does hexarelin desensitise faster than ipamorelin?

Yes. Continuous higher-amount hexarelin exposure downregulates the ghrelin receptor and blunts the GH response faster than ipamorelin, which is why research protocols favour lower amounts and cycling for hexarelin. Reported as research context, not a human-use protocol.

Q: What is hexarelin's CD36 effect?

Beyond GH release, hexarelin activates CD36, a scavenger receptor in cardiomyocytes involved in fatty-acid uptake and calcium handling. This underlies hexarelin's studied cardioprotective effects in post-ischaemic injury models — an angle ipamorelin and the simpler GHRPs lack. Preclinical research finding only.

Hexarelin and ipamorelin both hit the same ghrelin/GHSR receptor to release growth hormone — but they sit at opposite ends of a trade-off. Hexarelin pushes harder (and uniquely reaches the heart through CD36) at the cost of more cortisol/prolactin and faster desensitisation. Ipamorelin trades raw potency for a clean, selective pulse. Both are supplied by New-U for laboratory research only — not for human use.

Same receptor, different temperament

Both are growth-hormone secretagogues that activate GHSR-1a. Hexarelin is a potency-optimised descendant of GHRP-6, with two non-natural amino-acid substitutions that boost stability and GH-releasing strength. Ipamorelin took the opposite design path: maximum receptor selectivity , so it triggers GH without the cortisol, prolactin and hunger that the GHRP-6 lineage carries.

Side-by-side

Hexarelin Ipamorelin Class Potent GHRP-6-derived GHSR agonist Selective GHSR agonist GH potency Higher peak GH release Strong but lower than hexarelin Cortisol / prolactin Mild-moderate rise at higher amounts Negligible Unique mechanism Cardiac CD36 activation (cardioprotection research) None — pure, selective GH pulse Desensitisation Faster — favours cycling / lower amounts Slower — more forgiving Appetite effect Some (GHRP-6 heritage) Weak Best research fit Max GH signal; cardiac models Clean, repeatable GH pulse

The CD36 wrinkle

Hexarelin's standout feature isn't GH at all — it's CD36, a scavenger receptor in heart muscle involved in fatty-acid uptake and calcium handling. Hexarelin activation of cardiac CD36 underpins the cardioprotective effects reported in post-ischaemic injury models, a research angle ipamorelin simply doesn't have. If a study is about the heart rather than the GH axis, that's the differentiator.

Which to reach for

For the cleanest, most repeatable GH pulse with the fewest confounders, ipamorelin is the selective workhorse — and the reason it's the standard partner in the CJC-1295 + ipamorelin pairing. For maximum GH output or for cardiac CD36 work, hexarelin is the more potent (but less forgiving) tool. As with all GHRPs, hexarelin protocols lean on lower amounts and cycling to manage desensitisation.

Frequently Asked Questions

Is hexarelin or ipamorelin better? They trade potency for selectivity. Hexarelin releases more GH and engages cardiac CD36, but raises cortisol/prolactin and desensitises faster. Ipamorelin is cleaner and more selective. Choice depends on whether potency or a clean signal matters. Both research use only.

What is the difference between hexarelin and ipamorelin? Both are GHSR agonists. Hexarelin is the more potent, GHRP-6-derived peptide with added cardiac CD36 activity but more cortisol/prolactin and faster desensitisation; ipamorelin is selective with a strong-but-clean pulse and slower desensitisation.

Does hexarelin desensitise faster than ipamorelin? Yes — continuous higher-amount exposure downregulates the ghrelin receptor faster, so hexarelin research protocols favour lower amounts and cycling. Research context only.

What is hexarelin's CD36 effect? Hexarelin activates CD36, a cardiomyocyte scavenger receptor tied to fatty-acid uptake and calcium handling, underlying its studied cardioprotective effects in post-ischaemic models — an angle ipamorelin lacks. Preclinical finding only.

Buy Ipamorelin from New-U Research Compounds

Lab-verified by Janoshik Analytical (RP-HPLC + ESI-MS), sealed vials, discreet tracked worldwide shipping. For laboratory research use only — not for human consumption.

Premium research peptides at >99% HPLC-verified purity, third-party tested by Janoshik Analytical with a Certificate of Analysis on every lot. Shipped lab-direct, discreet and cold-chain, worldwide. For laboratory research use only.

Research use only (RUO). All products are sold strictly for laboratory and research purposes — not for human or veterinary consumption. Purchasers must be 21 or older.

Website & business operated by Hilxera Distribution Services LLC. Registered in Wyoming, ID: 2026-001928701.

Research use only — not for human consumption. All products are supplied strictly for laboratory research purposes.

Hexarelin vs Ipamorelin: Potency Against Selectivity

Same receptor, different temperament

Side-by-side

The CD36 wrinkle

Which to reach for

Frequently Asked Questions

Related Reading

From the Lab - Peptides on LinkedIn & Facebook

Research-Grade Hexarelin & Ipamorelin

Buy Ipamorelin from New-U Research Compounds

Shop

Learn

Company

Support

Ways to Pay

Shop by Compound

Shop by Goal

Ships worldwide