IGF-1 LR3 strongly enhances muscle pumps and performance. It stimulates satellite cell proliferation and increases both hypertrophy and hyperplasia in muscle tissue. This activation of muscle stem cells (satellite cells) increases protein synthesis, improves nutrient delivery to muscles, and enhances recovery and repair. Unlike natural IGF-1, IGF-1 LR3 remains active much longer, creating optimal conditions for significantly accelerated lean muscle growth, especially when paired with consistent training and nutrition.