Receptor Grade IGF-1 LR3

IGF-1 LR3 (Long R3 Insulin-like Growth Factor-1) is a modified form of IGF-1 with an arginine substitution at position 3 and a 13-amino acid extension at the N-terminus. These modifications reduce binding to IGF binding proteins, resulting in enhanced bioavailability and potency, and it is researched for effects on muscle growth, recovery, and cellular proliferation.