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    Growth Hormone / IGF-1 AxisPreclinical

    IGF-1 LR3 Dosage Guide: Protocols, Calculator & Safety

    Everything you need to know about IGF-1 LR3 dosing — protocols, safety, and where to buy.

    Dose Range

    20–100 mcg per day

    Frequency

    Once daily, typically post-workout or in the morning

    Cycle Length

    4–6 weeks maximum (to prevent receptor desensitization and hypoglycemia risk)

    Half-Life

    20–30 hours (vs 12–15 minutes for native IGF-1)

    Administration Routes

    SubcutaneousIntramuscular

    Quick Reconstitution Calculator

    Calculate syringe units instantly

    Syringe Draw

    10.0 units

    2500 mcg/ml · 0.100 ml draw

    Full Tool

    Dosing Protocols

    Beginner
    20–40 mcg subcutaneous once daily post-workout for 4 weeks.
    Standard
    50–80 mcg daily (split bilateral injections into target muscles) for 4–6 weeks.
    Advanced
    80–100 mcg daily intramuscular into lagging muscle groups for 4 weeks on / 4 weeks off.

    Weight-Based Dosing

    0.5–1 mcg/kg per day. Do not exceed 100 mcg/day.

    Commonly Stacked With

    Often used post-workout with fast-digesting carbohydrates to mitigate hypoglycemia. Some athletes time with GH peptide cycles. High mitogenic potential — not recommended for extended cycles.

    Side Effects & Safety

    Headache, mild GI discomfort, irritability at higher doses. Rare: insomnia, vivid dreams. Generally well-tolerated.

    Contraindications

    Cancer or history of cancer (growth-promoting properties). Hypoglycemia risk. Active diabetic retinopathy. Pregnancy or breastfeeding.

    Check interactions with the Interaction Checker →

    Additional Notes

    CRITICAL: Monitor blood glucose closely — IGF-1 LR3 can cause significant hypoglycemia. Always have fast carbs available. Eat a carb-containing meal within 30 minutes of injection. Site-specific intramuscular injections are used for targeted muscle growth.

    Where to Buy IGF-1 LR3

    Compare 4 listings across 4 vendors — from $49.99

    Frequently Asked Questions

    What is the recommended IGF-1 LR3 dosage?

    The typical dose range for IGF-1 LR3 is 20–100 mcg per day. It is usually administered Once daily, typically post-workout or in the morning. Always start with the lowest effective dose.

    How often should I take IGF-1 LR3?

    Once daily, typically post-workout or in the morning

    Does IGF-1 LR3 need to be cycled?

    Yes, typical cycle length is 4–6 weeks maximum (to prevent receptor desensitization and hypoglycemia risk).

    What are IGF-1 LR3 side effects?

    Headache, mild GI discomfort, irritability at higher doses. Rare: insomnia, vivid dreams. Generally well-tolerated.

    Where can I buy IGF-1 LR3?

    Compare 4 listings from 4 vendors on our price comparison page — starting from $49.99.

    IGF-1 LR3 Full Profile

    Research data, mechanisms, and pricing

    Interaction Checker

    Check drug & compound interactions

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