What is the difference between Ipamorelin and PEG-MGF?

Ipamorelin: Ipamorelin binds to the ghrelin receptor (GHSR-1a) and stimulates dose-dependent GH release with a clean hormonal profile. PEG-MGF: Pegylated form of MGF; activates muscle stem cells (satellite cells) to repair and regenerate muscle tissue after damage

Is Ipamorelin FDA approved?

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

How is Ipamorelin administered in research settings?

In research settings, Ipamorelin is typically administered via the subcutaneous route. 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›Ipamorelin vs PEG-MGF

Peptide Comparison

Ipamorelin vs PEG-MGF

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

Both are GH / IGF Axis peptides.

Ipamorelin

NNC 26-0161

PerformanceBanned from CompoundingResearch Only

Half-life: 2 hours

470 providers listed

Full Ipamorelin 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

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

Quick Verdict

Ipamorelin

Evidence

Emerging Clinical

Half-life

2 hours

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	Ipamorelin
More provider options (470 vs 10)	Ipamorelin

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

Side-by-Side Comparison

Ipamorelin

PEG-MGF

Mechanism Family

GH / IGF Axis

Half-life

2 hours

Several days (vs. minutes for native MGF)

FDA Status

banned from compounding

nomination withdrawn

Admin Routes

subcutaneous

subcutaneous, intramuscular

Availability

Research Only

Providers

470 listed

10 listed

FDA Update

Sep 2023

—

Avail. Notes

Selective GH secretagogue pentapeptide. Phase 2 by Helsinn (postoperative ileus) discontinued for lack of efficacy. No FDA approval. Not on FDA 503A bulks list. 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

Ipamorelin

Emerging ClinicalRCT · 5 key studies · most recent 2026

PEG-MGF

No citations on file

Research Citations

Ipamorelin

Review2026 · J Sports Med Phys Fitness

A new era of doping? Use of peptide and peptide-analog drugs in recreational and professional sport and bodyb…

Review2026 · Int J Mol Sci

Therapeutic Peptides in Aesthetic, Metabolic and Endocrine Conditions: Effects, Safety, Clinical Applications…

Review2026 · JBJS Rev

Injectable Peptides in Sports Medicine: A Structured Narrative Review of Evidence, Safety, and Antidoping Imp…

RCT2014 · International Journal of Colorectal Disease

Prospective, randomized, controlled, proof-of-concept study of the Ghrelin mimetic ipamorelin for the managem…

+1 more

PEG-MGF

No citations on file.

About Ipamorelin

Ipamorelin binds to the ghrelin receptor (GHSR-1a) and stimulates dose-dependent GH release with a clean hormonal profile. Unlike GHRP-6 or hexarelin, it does not significantly stimulate appetite-related pathways or cortisol secretion at standard research doses. This selectivity makes it a frequently studied peptide for protocols where hormonal side-effect profiles are a consideration.

Research Areas

selective GH release without cortisol or prolactin co-stimulationpulsatile GH secretion — synergistic with CJC-1295 in combination protocolslean mass support and fat metabolism via GH/IGF-1 axis modulationsubcutaneous injection 100–300 mcg; minimal receptor desensitization vs other GHRPs

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.

Ipamorelin

Absolute Contraindications

Under clinical review

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

Suggested Monitoring

IGF-1Fasting glucoseHbA1cInsulin

Research protocols routinely measure IGF-1 to track GH axis activity before and during use. Fasting glucose and insulin are monitored because GH elevation can reduce insulin sensitivity over time.

Regulatory Notes

global — WADA

This compound falls under WADA Prohibited List category S2 (Peptide Hormones, Growth Factors, Related Substances and Mimetics), prohibited at all times for competing athletes.

source

PEG-MGF

Absolute Contraindications

Under clinical review

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

Used Together?

Ipamorelin

CJC-1295
Research suggests Ipamorelin and CJC-1295 may produce enhanced growth hormone release effects when combined. CJC-1295 provides sustained GHRH receptor stimulation while Ipamorelin provides pulsatile ghrelin receptor stimulation — complementary pathways studied in GH secretion research.
Sermorelin
Research suggests Sermorelin and Ipamorelin may produce complementary growth hormone release effects when combined. Sermorelin acts as a GHRH analogue via pituitary receptors, while Ipamorelin acts via ghrelin receptors — dual-pathway stimulation studied in GH optimization research.
GLP-1 agonists
Research notes metabolic pathway overlap between growth hormone-releasing peptides and GLP-1 agonists. Both compound classes influence metabolic signaling; limited research has studied their combined effects. Consult your prescriber before combining.

Price (per mg)

Ipamorelin

$6.50/mg

$4.84 – $9.60 range

28 vendors

View price index →Find providers →

PEG-MGF

Not enough vendor pricing yet.

Find Providers

Where to source these peptides

Providers offering

Ipamorelin

470 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). Ipamorelin vs PEG-MGF — Per-mg Price Comparison. Retrieved July 23, 2026, from https://peptidebase.io/peptides/compare/ipamorelin/peg-mgf

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