IGF1-LR3

IGF1-LR3:

Dosage, Benefits,

and Research Explained

IGF-1 LR3 (Insulin-Like Growth Factor-1 Long R3) is a potent anabolic peptide that plays a crucial role in muscle growth, fat loss, and recovery. It is a modified version of IGF-1 with an extended half-life, making it significantly more effective at stimulating muscle hypertrophy and recovery.

Unlike GH-releasing peptides (Ipamorelin, CJC-1295, Tesamorelin), which stimulate natural GH production, IGF-1 LR3 directly promotes muscle and tissue growth by activating cellular pathways responsible for regeneration.

Research Peptide

CAS Number: 162750-64-6

Formula: C400H625N1110115S9

Purchase

Purchase from our preferred vendor: Project Zero

Purpose Dosage Frequency
Muscle Growth /
Strength		 20-40 mcg Daily
Anti-aging
Longevity		 10-20 mcg Daily

How It Works

IGF-1 LR3 binds to IGF-1 receptors in muscle tissue, leading to:

✔ Enhanced protein synthesis → Accelerates muscle growth & repair
✔ Increased nutrient absorption → Optimizes muscle recovery & fat metabolism
✔ Boosted satellite cell activation → Supports muscle regeneration & hypertrophy
✔ Improved glucose regulation → Enhances insulin sensitivity & metabolic function

Because IGF-1 LR3 has a longer half-life than regular IGF-1, it remains active in the body for 24+ hours, leading to sustained anabolic effects.

 

Research-Backed Benefits

1. Muscle Growth & Strength Enhancement

  • IGF-1 LR3 stimulates muscle protein synthesis & hypertrophy, leading to faster muscle gains.
  • Works synergistically with resistance training to maximize lean muscle development.

2. Fat Loss & Body Recomposition

  • Increases fat oxidation by enhancing glucose metabolism & insulin sensitivity.
  • Helps preserve lean muscle while reducing body fat levels.

3. Faster Recovery & Injury Healing

  • Accelerates tissue repair and reduces muscle soreness after workouts.
  • Can speed up recovery from injuries, tendinitis, and joint damage.

4. Anti-Aging & Longevity

  • Supports cellular repair & neuroprotection, reducing age-related muscle loss.
  • Improves collagen production for joint & skin health.

5. Increased Endurance & Athletic Performance

  • IGF-1 LR3 enhances ATP production, leading to greater stamina & endurance.
  • Optimizes oxygen utilization & nutrient uptake in muscle tissue.

 

Conclusion

IGF-1 LR3 is a powerful anabolic peptide that stimulates muscle growth, fat loss, and recovery by mimicking the natural effects of insulin-like growth factor-1. With its longer half-life and high bioavailability, it is one of the most effective peptides for bodybuilders, athletes, and longevity enthusiasts.

Whether used for muscle hypertrophy, metabolic enhancement, or injury recovery, IGF-1 LR3 provides remarkable results when combined with proper training and nutrition.

 

Disclaimer

This product is for research and educational purposes only. It is not FDA-approved for medical use, diagnosis, or treatment. Always consult a healthcare professional before use.

How does IGF-1 LR3 differ from regular IGF-1?

IGF-1 LR3 is a modified version of the naturally occurring insulin-like growth factor 1 (IGF-1). The “LR3” stands for “Long Arg3,” indicating two key changes: an extended half-life and a substitution of the third amino acid with arginine. These modifications make IGF-1 LR3 significantly more stable in the body, allowing it to remain active for much longer than regular IGF-1. As a result, IGF-1 LR3 can promote enhanced muscle growth, recovery, and performance benefits compared to unmodified IGF-1, which is quickly broken down and cleared from the bloodstream.

  • Muscle growth & strength: Within 2-4 weeks.
  • Fat loss & body recomposition: Noticeable in 4-6 weeks.
  • Recovery & healing benefits: Within 2-4 weeks of consistent use.

IGF-1 LR3 is generally well-tolerated, but possible mild side effects include:
✔ Temporary water retention
✔ Mild hypoglycemia (low blood sugar)
✔ Joint stiffness (due to increased muscle growth rate)

Tip: To minimize hypoglycemia, consume a balanced meal with protein & carbs post-injection.

es! Some popular stacks for enhanced effects include:
✔ CJC-1295 + Ipamorelin + IGF-1 LR3 → Maximum muscle growth & fat loss synergy.
✔ BPC-157 + TB-500 + IGF-1 LR3 → For injury healing & tissue repair.
✔ NAD+ + IGF-1 LR3 → For anti-aging & longevity benefits.

Referenced Citations

  1. Tomas, F. M., et al. (1993). Anabolic effects of insulin-like growth factor-I (IGF-I) and an IGF-I variant in normal female rats. Journal of Endocrinology, 137(3), 413-421. [Online].
    Available: https://pubmed.ncbi.nlm.nih.gov/8229461/
  2. Philippou, A., et al. (2007). The role of the insulin-like growth factor 1 (IGF-1) in skeletal muscle physiology. In Vivo, 21(1), 45-54. [Online].
    Available: https://pubmed.ncbi.nlm.nih.gov/17354613/
  3. Stremming, J., et al. (2021). IGF-1 Increases Fetal Organ Growth. Children’s Hospital Colorado. [Online].
    Available: https://www.childrenscolorado.org/advances-answers/recent-articles/igf1/
  4. Kolomin, T., et al. (2013). A new generation of drugs: synthetic peptides based on natural regulatory peptides. Neuroscience and Behavioral Physiology, 43(7), 880-891. [Online].
    Available: https://pubmed.ncbi.nlm.nih.gov/23864238/
  5. Qkine. (2024). Recombinant human/bovine/porcine IGF-1 LR3 protein (Qk041). [Online].
    Available: https://qkine.com/product/recombinant-human-igf1-lr3-protein-qk041/
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