Epigen vs IGF-1 LR3

A detailed comparison to help you understand the differences and choose the right peptide for your research goals.

Epigen

Epigen is a member of the epidermal growth factor (EGF) family. It plays roles in skin regeneration and has been studied for wound healing and anti-aging applications.

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IGF-1 LR3

IGF-1 LR3 (Long R3 Insulin-like Growth Factor-1) is a modified version of IGF-1 with extended half-life and enhanced potency. The modifications prevent binding to IGF binding proteins, increasing bioavailability.

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Side-by-Side Comparison

Aspect	Epigen	IGF-1 LR3
Dose Range	100 mcg–500 mcg	20 mcg–100 mcg
Frequency	1x daily	1x daily
Cycle Length	4–8 weeks	4–6 weeks
Route	subcutaneous	subcutaneous
Mechanism	Binds to and activates the EGF receptor (EGFR), promoting cell proliferation, migration, and differentiation. Involved in skin homeostasis and repair processes.	Binds to IGF-1 receptors to promote protein synthesis, muscle growth, and fat metabolism. The LR3 modification (13 amino acid extension and arginine substitution) extends half-life from minutes to 20-30 hours.
Typical Dosage	Topical: Typically used at low concentrations (ppm to low %) in cosmetic formulations. Research applications vary.	Research protocols typically use 20-100mcg daily, often divided into multiple injections or administered bilaterally to target muscles.
Administration	Primarily topical application for skincare. Research may use other routes for systemic effects.	Intramuscular injection (site-specific growth) or subcutaneous for systemic effects. Often cycled 4-6 weeks on, equal time off.
Side Effects	Topical use generally well-tolerated. Theoretical concerns about promoting cell proliferation.	Hypoglycemia, joint pain, water retention, potential jaw/hand growth with extended use, and injection site reactions.
Best For	Recovery & Healing Skin Health & Aesthetics	Muscle Growth Fat Loss Recovery & Healing