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IGF-1 LR3 (Insulin-Like Growth Factor 1 Long R3) by XT Labs is a highly potent, modified version of natural IGF-1.1 The "LR3" modification extends the half-life of the peptide to approximately 20–30 hours (compared to the 20-minute half-life of standard IGF-1).2 This long-acting version prevents the peptide from being deactivated by binding proteins, allowing it to remain active and promote cellular growth throughout the day.
This USA Domestic kit from XT Labs includes 1 vial of 1 mg (1,000 mcg) and a dedicated vial of Bacteriostatic Water for reconstitution.
Muscle Hyperplasia: Known for its unique ability to cause hyperplasia—the literal splitting and creation of new muscle cells—rather than just making existing cells larger (hypertrophy).
Superior Nutrient Partitioning: Directs glucose and amino acids into muscle tissue instead of fat stores, facilitating a "lean bulk" or body recomposition.
Accelerated Recovery: Significantly reduces downtime between sessions by repairing muscle tissue, tendons, and ligaments at a cellular level.
Enhanced Protein Synthesis: Increases the body's efficiency in utilizing dietary protein to build new muscle mass.3
Neuroprotective Effects: Supports nerve cell regeneration and overall connectivity between the brain and muscle fibers.
| Feature | Details |
| Active Substance | Insulin-Like Growth Factor 1 Long R3 |
| Manufacturer | XT Labs |
| Total Content | 1 mg (1,000 mcg) per vial |
| Kit Includes | 1 Vial Peptide + 1 Vial Bacteriostatic Water |
| Form | Lyophilized (Freeze-dried) Powder |
| Storage | Refrigerated (2°C - 8°C) |
Recommended Dosage: 20 mcg to 50 mcg per day.
Timing: For best results, it is typically administered post-workout or in the morning.
Cycle Length: 4–6 weeks of consistent use, followed by a break of at least 4 weeks to prevent receptor desensitization.4
Method: Subcutaneous or intramuscular injection.5
Preparation: Add 1 ml or 2 ml of the included Bacteriostatic Water to the 1 mg vial.
Mixing: Let the water run down the side of the glass. Do not shake. Gently swirl until the powder is fully dissolved.
Stability: Reconstituted vials must be refrigerated and are best used within 14–20 days.
Hypoglycemia Risk: IGF-1 LR3 can lower blood sugar levels.6 Always have a meal containing carbohydrates shortly after administration.
Cell Proliferation: Because it encourages cell growth, it should not be used by individuals with a history of cancer or tumors.
Consultation: Not for individuals under 21, pregnant/breastfeeding women, or those with existing hormonal disorders.
