Home›Research›Compare›Ipamorelin vs Retatrutide
Peptide ComparisonIpamorelin vs Retatrutide
Ipamorelin
NNC 26-0161
Half-life: 2 hours
470 providers listed
Retatrutide
LY3437943
Half-life: ~6 days
98 providers listed
Ipamorelin and Retatrutide target different goals — Ipamorelin for selective GH release without cortisol or prolactin co-stimulation, Retatrutide for profound weight loss. They're compared here for reference, not as direct substitutes.
Ipamorelin
Evidence
Half-life
2 hours
Retatrutide
Evidence
Half-life
~6 days
Ipamorelin and Retatrutide target different goals — Ipamorelin for GH / IGF Axis, Retatrutide for Metabolic. They're compared here for reference; there isn't a single “better” choice between them.
Ipamorelin
Retatrutide
Ipamorelin
A new era of doping? Use of peptide and peptide-analog drugs in recreational and professional sport and bodyb…
Therapeutic Peptides in Aesthetic, Metabolic and Endocrine Conditions: Effects, Safety, Clinical Applications…
Injectable Peptides in Sports Medicine: A Structured Narrative Review of Evidence, Safety, and Antidoping Imp…
Prospective, randomized, controlled, proof-of-concept study of the Ghrelin mimetic ipamorelin for the managem…
+1 more
Retatrutide
Triple-hormone-receptor agonist retatrutide for obesity — a phase 2 trial
Dysesthesia associated with GLP-1 agonist therapies: data-mining analysis and literature review.
Beyond weight loss: multisystem benefits of obesity medications.
Retatrutide: Triple acting jab for type 2 diabetes lowers blood sugar and boosts weight loss, trial reports.
+9 more
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.
About Retatrutide
Triple GIP/GLP-1/glucagon receptor agonist; targets three pathways for synergistic fat reduction
Information below reflects published research data only — not medical advice. Consult a qualified provider before use.
Ipamorelin
Under clinical review
Being verified by our medical team before we display contraindications for this peptide.
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.
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.
sourceRetatrutide
Class-based (investigational)
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.
Mod GRF 1-29
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.
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.
Ipamorelin
Retatrutide
Where to source these peptides
Ipamorelin
470 listed
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Providers offeringRetatrutide
98 listed
Browse directory →
PeptideBase lists providers for educational research purposes only. Always consult a qualified healthcare professional before obtaining or using any peptide.
Related 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 Retatrutide — Per-mg Price Comparison. Retrieved July 22, 2026, from https://peptidebase.io/peptides/compare/ipamorelin/retatrutide