PinnyPeptide

GHRP-6 vs Ipamorelin

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

Ipamorelin

Growth Hormone

Selective growth hormone secretagogue with minimal side effects.

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

100-300 mcg

Half-life

~2 hours

FDA status

Not FDA approved for human use. Clinical development discont…

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

Ipamorelin effects

  • Selectively stimulates growth hormone release
  • Promotes fat metabolism without affecting cortisol
  • Supports lean muscle growth and recovery
  • Improves sleep quality through enhanced GH pulsatility
  • Does not significantly increase appetite or 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

Ipamorelin side effects

  • Mild head rush or flushing immediately after injection
  • Transient water retention
  • Injection site irritation
  • Occasional lightheadedness

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

Ipamorelin dosing ranges

GH optimization and anti-aging

100-300 mcg · Two to three times daily (SubQ) · 8-12 weeks

Combined with CJC-1295 (Mod GRF)

100-200 mcg · Two to three times daily · 8-12 weeks

Full GHRP-6 guide → Full Ipamorelin guide →

GHRP-6 vs Ipamorelin — common questions

What is the difference between GHRP-6 and Ipamorelin?

GHRP-6: First-generation ghrelin mimetic — potent GH release with notable appetite stimulation. Typical dose 100 mcg. Ipamorelin: Selective growth hormone secretagogue with minimal side effects. Typical dose 100-300 mcg. Both fall under the Growth Hormone category.

Can you stack GHRP-6 and Ipamorelin?

Stacking GHRP-6 with Ipamorelin 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 Ipamorelin?

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. Ipamorelin is typically dosed: Two to three times daily (SubQ) for GH optimization and anti-aging; Two to three times daily for Combined with CJC-1295 (Mod GRF).

Are GHRP-6 and Ipamorelin FDA approved?

GHRP-6: Not FDA approved for any indication. Ipamorelin: Not FDA approved for human use. Clinical development discontinued by Novo Nordisk.

Related peptide comparisons

cjc-1295 vs ghrp-6ghrp-2 vs ghrp-6ghrp-6 vs hexarelinghrp-6 vs sermorelinghrp-6 vs tesamorelinaod-9604 vs ipamorelin

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