PinnyPeptide

GHRP-6 vs Hexarelin

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

Peptide A

GHRP-6

Growth Hormone

First-generation ghrelin mimetic — potent GH release with notable appetite stimulation.

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-6 effects

  • Stimulates strong pulsatile growth hormone release
  • Markedly increases appetite via ghrelin-receptor activation
  • Synergizes with GHRH analogs (Sermorelin, CJC-1295)
  • Modest gains in lean mass and recovery over multi-week courses
  • May promote tissue repair via secondary IGF-1 elevation

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-6 side effects

  • Pronounced hunger within 30-60 minutes of injection
  • Increased prolactin and cortisol (more than newer GHRPs)
  • Water retention and mild edema
  • Injection-site flushing or tingling
  • Lethargy or tiredness shortly after dosing

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-6 dosing ranges

GH stimulation / recovery

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

Combined with CJC-1295 (Mod GRF)

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

Appetite stimulation in cachexia research

100-150 mcg · Before meals · Per protocol

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-6 guide → Full Hexarelin guide →

GHRP-6 vs Hexarelin — common questions

What is the difference between GHRP-6 and Hexarelin?

GHRP-6: First-generation ghrelin mimetic — potent GH release with notable appetite stimulation. 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-6 and Hexarelin?

Stacking GHRP-6 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-6 or Hexarelin?

GHRP-6 is typically dosed: Two to three times daily (SubQ) for GH stimulation / recovery; Two to three times daily for Combined with CJC-1295 (Mod GRF); Before meals for Appetite stimulation in cachexia research. 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-6 and Hexarelin FDA approved?

GHRP-6: Not FDA approved for any indication. Hexarelin: Not FDA approved for any indication.

Related peptide comparisons

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

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