IGF-1 LR3

Insulin-like Growth Factor 1 Long Arg3—better known as IGF‑1 LR3—is a modified version of the naturally occurring IGF‑1 hormone, prized for its ability to increase muscle hypertrophy, enhance recovery, and promote cellular growth. With a longer half-life and enhanced potency compared to standard IGF‑1, LR3 has quickly become a go-to peptide for athletes looking to build muscle, retain gains after a cycle, or accelerate healing.