What is IGF-1 LR3? Growth Factor Peptide for Muscle & Recovery

IGF-1 LR3 (Insulin-like Growth Factor 1, Long R3) is a modified version of IGF-1 that supports muscle growth, recovery, and overall performance. The “LR3” modification extends its active life in the body, making it more potent than standard IGF-1.

How IGF-1 LR3 Works

IGF-1 is naturally produced in response to growth hormone and plays crucial roles in tissue growth and repair. The LR3 modification:

• Extends the peptide’s half-life significantly
• Reduces binding to IGF binding proteins
• Increases bioavailability and potency
• Supports prolonged anabolic effects

Benefits of IGF-1 LR3

Muscle Growth

IGF-1 LR3 supports muscle hypertrophy by promoting protein synthesis and muscle cell proliferation. It’s a powerful tool for those seeking to build lean muscle mass.

Recovery

Enhanced tissue repair capabilities make IGF-1 LR3 valuable for recovery from intense training. It helps reduce downtime between workouts.

Performance

By supporting muscle growth and recovery, IGF-1 LR3 can contribute to improved athletic performance and training capacity. For a deeper look at specific benefits, see our guides for men and women.

Who May Benefit From IGF-1 LR3

IGF-1 LR3 may be suitable for:

• Those seeking to maximize muscle growth
• Athletes looking for enhanced recovery
• Individuals wanting to optimize training results
• People interested in body composition improvement

How to Take IGF-1 LR3

IGF-1 LR3 is administered via subcutaneous injection. Inject 100mcg SubQ on Monday, Wednesday, and Friday before exercise, ideally with 20g protein and 20g carbohydrates. A typical protocol involves 8 weeks of use followed by an 8-week break. Refrigerate after reconstitution. For complete details, see the IGF-1 LR3 Treatment Plan and our dosing explanation guide.

Stacking IGF-1 LR3 With Growth Hormone Peptides

IGF-1 LR3 works synergistically with growth hormone-releasing peptides like CJC-1295/Ipamorelin and Tesamorelin. While GHRH peptides stimulate natural GH production, IGF-1 LR3 provides direct growth factor support — a powerful combination for muscle building and recovery protocols.

Getting Started

If you’re interested in IGF-1 LR3 for muscle building and recovery, our team can help determine if it aligns with your fitness goals. We’ll create a protocol that complements your training program.