Home›Research›Compare›GHRP-6 vs Mod GRF 1-29
Peptide ComparisonGHRP-6 vs Mod GRF 1-29
Both are GH / IGF Axis peptides.
GHRP-6
Growth Hormone Releasing Peptide-6
Half-life: 15-60 minutes
40 providers listed
Mod GRF 1-29
CJC-1295 no DAC
Half-life: ~30 minutes
15 providers listed
GHRP-6 is carried by more providers on PeptideBase (40 vs 15); otherwise the two are closely matched on the measures we track.
GHRP-6
Evidence
Half-life
15-60 minutes
Mod GRF 1-29
Evidence
Half-life
~30 minutes
| Your goal | Better option |
|---|---|
| Lower typical price per mg | GHRP-6 |
| More provider options (40 vs 15) | GHRP-6 |
Research summary only — not medical advice. Consult a qualified provider before making any decisions.
GHRP-6
Mod GRF 1-29
GHRP-6
Mod GRF 1-29
Endocrine and metabolic effects of long-term administration of [Nle27]growth hormone-releasing hormone-(1-29)…
Effects of [norleucine27]growth hormone-releasing hormone (GHRH) (1-29)-NH2 administration on the immune syst…
About GHRP-6
Ghrelin receptor agonist; stimulates pituitary GH release and increases appetite via hypothalamic ghrelin pathways
About Mod GRF 1-29
Modified GHRH analog; binds GHRH receptors with improved stability to produce physiological GH pulses when combined with a GHRP
Information below reflects published research data only — not medical advice. Consult a qualified provider before use.
GHRP-6
Under clinical review
Being verified by our medical team before we display contraindications for this peptide.
GHRP-6 produces stronger cortisol and prolactin stimulation than selective GH peptides. Research protocols measure IGF-1 for GH axis response and baseline cortisol. Glucose markers are standard given GH's effect on insulin sensitivity.
Mod GRF 1-29
Under clinical review
Being verified by our medical team before we display contraindications for this peptide.
GHRP-6
Corticosteroids
Research notes that GHRP-6 stimulates cortisol and ACTH release via the HPA axis. Combined use with corticosteroid medications may affect glucocorticoid regulation. Consult your prescriber before combining.
Mod GRF 1-29
Ipamorelin
Research suggests Ipamorelin and Mod GRF 1-29 may produce enhanced growth hormone pulse effects when combined. Ipamorelin acts via ghrelin receptors (GHSR) while Mod GRF 1-29 acts via GHRH receptors — distinct pathways that research suggests may amplify GH secretion when activated together.
GHRP-6
Mod GRF 1-29
Where to source these peptides
GHRP-6
40 listed
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Providers offeringMod GRF 1-29
15 listed
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PeptideBase lists providers for educational research purposes only. Always consult a qualified healthcare professional before obtaining or using any peptide.
More GH / IGF Axis Comparisons
Browse all peptides →Educational research tools — not medical advice.
Cite this page
Data last updated July 22, 2026
Free to reference and republish with attribution to PeptideBase. Choose a format:
PeptideBase. (2026). GHRP-6 vs Mod GRF 1-29 — Per-mg Price Comparison. Retrieved July 22, 2026, from https://peptidebase.io/peptides/compare/ghrp-6/mod-grf-1-29