What Is IGF-1 LR3? — Mechanism, Research & Safety

Overview

IGF-1 LR3 is classified as a growth factor peptide. Muscle growth, recovery, hyperplasia.

IGF-1 analog with extended half-life for muscle cell hyperplasia (new cell creation, not just hypertrophy). Promotes nitrogen retention and protein synthesis.

Also known as: Insulin-like Growth Factor 1 Long R3

How Does IGF-1 LR3 Work?

IGF-1 analog with extended half-life for muscle cell hyperplasia (new cell creation, not just hypertrophy). Promotes nitrogen retention and protein synthesis.

At the molecular level, IGF-1 LR3 operates through pathways characteristic of the Growth Factor class, interacting with target receptors and downstream signaling cascades to produce its observed effects.

Published Research

The following studies are indexed from PubMed and peer-reviewed journals:

[1]IGF-1 LR3 promotes muscle growth in animal models

IGF-1 LR3 demonstrates significantly enhanced potency over native IGF-1 due to reduced binding protein affinity and extended half-life, promoting dose-dependent muscle growth.

Evidence: preclinical

[2]IGF-1 signaling: muscle repair and regeneration review

Philippou & Barton (Growth Hormone & IGF Res.): Comprehensive review of IGF-1's role in muscle satellite cell activation, myoblast proliferation, and skeletal muscle regeneration.

Evidence: preclinical

[3]IGF-1 and cancer risk comprehensive epidemiological review

Bowers et al.: Meta-analysis of epidemiological studies examining positive correlation between circulating IGF-1 levels and prostate, breast, and colorectal cancer risk.

Evidence: moderate strong

Safety Profile

Potent; use caution. Risk of hypoglycemia. Theoretical cancer promotion concern well-documented in literature. Research-only.

Side Effect	Incidence	Severity
Hypoglycemia	~10% of users	moderate
Joint pain	~8% of users	mild
Headache	~5% of users	mild
Fluid retention	~10% of users	mild

Sourcing IGF-1 LR3 for Research

If you're looking to source IGF-1 LR3 for laboratory research, our vendor directory compares pricing, purity testing, and COA verification from independently vetted suppliers.

Check Current Market Pricing Compare Vendors Side by Side

Disclosure: PeptiDex may earn a commission from affiliate links. This does not affect our recommendations.

Full Research Profile

IGF-1 LR3 — dosing, interactions, timelines & more

Comprehensive compound profile with sourcing information, stacking synergies, and outcome timelines.