IGF-1 LR3 1mg Snap Pen

IGF-1 LR3 (Insulin-like Growth Factor-1 Long R3) is a synthetic analogue of naturally occurring IGF-1, modified with a 13-amino-acid extension at the N-terminus and an arginine substitution at position 3. These modifications reduce its binding to IGF-binding proteins (IGFBPs), resulting in a significantly extended half-life of approximately 20–30 hours compared to just 12–15 minutes for standard IGF-1. 

MetaGen's IGF-1 LR3 Snap Pen uses a dual-chamber lyophilised delivery system, keeping the peptide stable in powder form until activation — ensuring maximum potency at the point of use. IGF-1 LR3 works by binding to IGF-1 receptors throughout the body, activating downstream signalling pathways involved in protein synthesis, cellular growth, and glucose uptake. It promotes hypertrophy (muscle cell growth), supports satellite cell activation for muscle repair, and plays a key role in fat utilisation as an energy source. This peptide is widely researched in the context of performance recovery, body composition optimisation, and anti-ageing protocols.