IGF-1 LR3 Dosage, Protocol, and Reconstitution Guide

IGF-1 LR3

IGF-1 LR3 is a long-acting analog of insulin-like growth factor 1 studied for its anabolic effects on muscle growth, recovery, and nutrient partitioning. Compared with standard IGF-1, its structural changes extend activity and reduce binding to IGF-binding proteins.

How It Works

IGF-1 Receptor Activation → Protein Synthesis ↑ → Recovery ↑ → Lean Mass Support

IGF-1 LR3 acts downstream of growth hormone signaling and supports anabolic activity in muscle and other tissues. It is commonly discussed for recovery, hypertrophy support, and nutrient utilization during training-focused protocols.

IGF-1 LR3 Protocol

Weeks 1–2

Dose20 mcg

Units4 units (0.04 mL)

Weeks 3–4

Dose30 mcg

Units6 units (0.06 mL)

Weeks 5–8

Dose40 mcg

Units8 units (0.08 mL)

Weeks 9–12

Dose50 mcg

Units10 units (0.10 mL)

Frequency: Once daily
Timing: Post-workout or earlier in the day
Cycle Length: 4–8 weeks (advanced up to 12 weeks)

Advanced Protocol

Higher Range

Dose50–100 mcg daily

Higher-dose use is generally reserved for more advanced protocols. Many users stay in the 20–50 mcg range for a more controlled approach.

When & Where to Inject

• Subcutaneous injection is most common
• Often used post-workout or earlier in the day
• Abdomen, thigh, or upper arm are common sites
• Rotate injection sites consistently

Reconstitution & Dosing (1 mg Vial)

Vial 1 mg

Water 2.0 mL

Concentration 500 mcg/mL

Conversion 1 unit = 5 mcg

Reconstitution Steps

Draw 2.0 mL bacteriostatic water

Inject slowly down vial wall

Gently swirl (do not shake)

Refrigerate immediately

Storage

Lyophilized: refrigerated or frozen

Reconstituted: 2–8°C

Use Window

Use within ~30 days

Monitoring During Use

• Recovery and soreness
• Muscle fullness and training output
• Body composition changes
• Blood glucose response if sensitive

Benefits

• Supports muscle growth and repair
• Improves nutrient partitioning
• May enhance recovery speed
• Can support lean body mass retention
• Works downstream of GH signaling

Potential Side Effects

• Injection site irritation
• Possible headache
• Water retention
• Low blood sugar symptoms in sensitive users

Stacking Strategies

• Growth Stack: IGF-1 LR3 + Ipamorelin
• Recovery: IGF-1 LR3 + BPC-157
• Advanced: IGF-1 LR3 + CJC-1295

Important Notes

• More potent than most beginner peptides
• Often used in shorter cycles
• Post-workout timing is common in training-focused protocols
• Start low and assess response carefully

Important Disclaimer

IGF-1 LR3 is not FDA-approved and is intended for research purposes only.

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