Overview
IGF-1 LR3 is a chemically modified version of the naturally occurring Insulin-Like Growth Factor-1, designed specifically to overcome the limitations of the standard hormone. By adding thirteen amino acids to the N-terminus and altering the third position of the chain to include Arginine, researchers created a version that avoids being neutralized by IGF-binding proteins. This modification results in a significantly longer biological half-life and greater potency compared to standard IGF-1.
Widely utilized in research and bodybuilding contexts, this peptide focuses its primary action on muscle tissue. It creates a highly anabolic state by stimulating protein synthesis and encouraging the proliferation of satellite cells. Beyond its muscle-building capabilities, it also plays a role in metabolic health by improving glucose transport and suppressing inflammatory glucocorticoids, making it a powerful tool for body composition and recovery.
Mechanism of action
As a lengthened analog of IGF-1 with an arginine substitution, it has a reduced affinity for binding proteins, allowing it to remain active longer and more effectively trigger the PI3K/Akt/mTOR pathways for muscle growth.
Reported benefits
- ▸Promotes significant skeletal muscle hypertrophy and nitrogen retention.
- ▸Enhances recovery times by reducing systemic inflammation.
- ▸Facilitates fat loss and improved nutrient partitioning.
- ▸Increases protein synthesis and glucose uptake within muscle cells.
Reported side effects
- ·Hypoglycemia (low blood sugar)
- ·Abdominal discomfort or bloating
- ·Joint pain
Often stacked with
HGHTestosteroneOther anabolic agents