What is the difference between GHRP-6 and PEG-MGF?

GHRP-6: Ghrelin receptor agonist; stimulates pituitary GH release and increases appetite via hypothalamic ghrelin pathways PEG-MGF: Pegylated form of MGF; activates muscle stem cells (satellite cells) to repair and regenerate muscle tissue after damage

Is GHRP-6 FDA approved?

GHRP-6 is not FDA approved and restricted from compounding. It is discussed for research and educational purposes only, not as medical guidance.

How is GHRP-6 administered in research settings?

In research settings, GHRP-6 is typically administered via the subcutaneous or intranasal routes. PeptideBase does not provide dosing or administration instructions.

How is PEG-MGF administered in research settings?

In research settings, PEG-MGF is typically administered via the subcutaneous or intramuscular routes. PeptideBase does not provide dosing or administration instructions.

Home›Research›Compare›GHRP-6 vs PEG-MGF

Peptide Comparison

GHRP-6 vs PEG-MGF

Name: GHRP-6 vs PEG-MGF — Per-mg Price Comparison
Creator: PeptideBase
License: https://peptidebase.io/terms

Both are GH / IGF Axis peptides.

GHRP-6

Growth Hormone Releasing Peptide-6

PerformanceBanned from CompoundingResearch Only

Half-life: 15-60 minutes

40 providers listed

Full GHRP-6 profile →

PEG-MGF

Pegylated Mechano Growth Factor

RecoveryResearch Only

Half-life: Several days (vs. minutes for native MGF)

10 providers listed

Full PEG-MGF profile →

Bottom line

GHRP-6 has published research citations on file; PEG-MGF does not yet — the main evidence gap between them.

Quick Verdict

GHRP-6

Evidence

Emerging Clinical

Half-life

15-60 minutes

PEG-MGF

Evidence

Not rated

Half-life

Several days (vs. minutes for native MGF)

Which One Should You Choose?

Your goal	Better option
Has published research citations	GHRP-6
Lower typical price per mg	GHRP-6
More provider options (40 vs 10)	GHRP-6

Research summary only — not medical advice. Consult a qualified provider before making any decisions.

Side-by-Side Comparison

GHRP-6

PEG-MGF

Mechanism Family

GH / IGF Axis

Half-life

15-60 minutes

Several days (vs. minutes for native MGF)

FDA Status

banned from compounding

nomination withdrawn

Admin Routes

subcutaneous, intranasal

subcutaneous, intramuscular

Availability

Research Only

Providers

40 listed

10 listed

FDA Update

Sep 2023

—

Avail. Notes

Hexapeptide GH secretagogue. No FDA approval. Listed on the FDA Category 2 'significant safety risks' bulk-substances list (503B designation, added September 2023). WADA prohibited. Historical Phase 2 trials (Theratechnologies) but abandoned. Research chemical.

PEGylated IGF-1 splice variant with extended half-life. No FDA approval. WADA prohibited. Not on any FDA list. Sold as research chemical. No NDA or IND.

Research Evidence

GHRP-6

Emerging ClinicalRCT · 2 key studies · dated evidence base — most recent 1997

PEG-MGF

No citations on file

Research Citations

GHRP-6

Review1997 · European Journal of Endocrinology

Growth hormone-releasing peptides

RCT1995 · European Journal of Endocrinology

Growth hormone-releasing effect of oral growth hormone-releasing peptide 6 (GHRP-6) administration in childre…

PEG-MGF

No citations on file.

About GHRP-6

Ghrelin receptor agonist; stimulates pituitary GH release and increases appetite via hypothalamic ghrelin pathways

Research Areas

GH release via GHS-R1a agonism — synergistic with GHRHpronounced appetite stimulation (ghrelin-mimetic effect)muscle recovery and GH pulse amplificationco-stimulation of cortisol and prolactin — less selective than ipamorelin

About PEG-MGF

Pegylated form of MGF; activates muscle stem cells (satellite cells) to repair and regenerate muscle tissue after damage

Research Areas

muscle repairsatellite cell activationpost-injury recovery

Safety Profile

Information below reflects published research data only — not medical advice. Consult a qualified provider before use.

GHRP-6

Absolute Contraindications

Under clinical review

Being verified by our medical team before we display contraindications for this peptide.

Suggested Monitoring

IGF-1Fasting glucoseHbA1cCortisolInsulin

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.

PEG-MGF

Absolute Contraindications

Under clinical review

Being verified by our medical team before we display contraindications for this peptide.

Used Together?

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.

Price (per mg)

GHRP-6

$4.51/mg

$4.00 – $7.00 range

46 vendors

View price index →Find providers →

PEG-MGF

$21.50/mg

$17.28 – $23.59 range

5 vendors

View price index →Find providers →

Find Providers

Where to source these peptides

Providers offering

GHRP-6

40 listed

Browse directory →

Providers offering

PEG-MGF

10 listed

Browse directory →

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 PEG-MGF — Per-mg Price Comparison. Retrieved July 22, 2026, from https://peptidebase.io/peptides/compare/ghrp-6/peg-mgf

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