PinnyPeptide

GHRP-2 vs Hexarelin

Side-by-side comparison: effects, dosing ranges, side effects, regulatory status, and reconstitution.

Peptide A

GHRP-2

Growth Hormone

Refined ghrelin mimetic — stronger GH release than GHRP-6 with less hunger.

Peptide B

Hexarelin

Growth Hormone

The most potent GHRP — strong GH release with documented cardioprotective signaling.

Typical vial

5 mg

Typical dose

100 mcg

Half-life

~15-60 minutes

FDA status

Not FDA approved for any indication.

Typical vial

5 mg

Typical dose

100 mcg

Half-life

~55 minutes

FDA status

Not FDA approved for any indication.

GHRP-2 effects

  • Stronger pulsatile GH release than GHRP-6 at equivalent doses
  • Less appetite stimulation than GHRP-6 (but more than Ipamorelin)
  • Synergizes with GHRH analogs for amplified GH pulses
  • Used clinically (Japan) to diagnose adult growth hormone deficiency
  • Secondary IGF-1 elevation over multi-week courses

Hexarelin effects

  • Most potent acute GH release of any GHRP at equivalent doses
  • Documented cardioprotective signaling via CD36 receptor
  • Stimulates IGF-1 elevation over multi-week courses
  • Supports tissue repair and recovery
  • Mild secondary stimulation of ACTH and prolactin

GHRP-2 side effects

  • Mild appetite increase (less than GHRP-6)
  • Elevated prolactin and cortisol (less than GHRP-6)
  • Head rush or flushing immediately after injection
  • Water retention with chronic dosing
  • Possible tachyphylaxis with continuous high-frequency use

Hexarelin side effects

  • Strongest cortisol and prolactin elevation of the GHRPs
  • Pronounced water retention
  • Lethargy and fatigue with chronic use
  • Rapid tachyphylaxis (response diminishes after 3-4 weeks)
  • Mild appetite stimulation

GHRP-2 dosing ranges

GH optimization / anti-aging

100 mcg · Two to three times daily (SubQ) · 8-12 weeks

Combined with CJC-1295 (Mod GRF)

100 mcg of each · Two to three times daily · 8-12 weeks

Adult GHD diagnostic (Japan, clinical)

100 mcg IV bolus · Single dose · One-time test

Hexarelin dosing ranges

Short-course GH stimulation

100 mcg · Two to three times daily (SubQ) · 4 weeks maximum, then 4-week break

Combined with CJC-1295 (Mod GRF)

100 mcg of each · Two to three times daily · 4 weeks on / 4 weeks off

Cardioprotective research

1-2 mcg/kg · Per protocol (research-only) · Variable

Full GHRP-2 guide → Full Hexarelin guide →

GHRP-2 vs Hexarelin — common questions

What is the difference between GHRP-2 and Hexarelin?

GHRP-2: Refined ghrelin mimetic — stronger GH release than GHRP-6 with less hunger. Typical dose 100 mcg. Hexarelin: The most potent GHRP — strong GH release with documented cardioprotective signaling. Typical dose 100 mcg. Both fall under the Growth Hormone category.

Can you stack GHRP-2 and Hexarelin?

Stacking GHRP-2 with Hexarelin is a protocol-design question best raised with a clinician — it depends on your goal, current bloodwork, and whether both peptides target overlapping mechanisms. Both peptides should be tracked independently with separate injection sites and timing. PinnyPeptide supports multi-peptide stacks with automatic injection site rotation.

Which is dosed more frequently, GHRP-2 or Hexarelin?

GHRP-2 is typically dosed: Two to three times daily (SubQ) for GH optimization / anti-aging; Two to three times daily for Combined with CJC-1295 (Mod GRF); Single dose for Adult GHD diagnostic (Japan, clinical). Hexarelin is typically dosed: Two to three times daily (SubQ) for Short-course GH stimulation; Two to three times daily for Combined with CJC-1295 (Mod GRF); Per protocol (research-only) for Cardioprotective research.

Are GHRP-2 and Hexarelin FDA approved?

GHRP-2: Not FDA approved for any indication. Hexarelin: Not FDA approved for any indication.

Related peptide comparisons

cjc-1295 vs ghrp-2ghrp-2 vs ghrp-6ghrp-2 vs ipamorelinghrp-2 vs sermorelinghrp-2 vs tesamorelincjc-1295 vs hexarelin

Tracking either of these?

Log doses, automate injection site rotation, and never lose track of where you last pinned. Free forever.

Get Started Free