Crucial role of androgen receptor in resistance and endurance trainings induced muscle hypertrophy through IGF 1 IGF 1R PI3K Akt mTOR pathway Nutrition & Metabolism Springer Nature Link Activation of IGF 1 pathway and suppression of atrophy related genes are involved in Epimedium extract (icariin) promoted C2C12 myotube hypertrophy Scientific Reports IGF1 LR3 (1mg) Nordsci QK041 Recombinant human bovine porcine IGF 1 LR3 protein IGF 1 LR3 tells your muscle cells to grow, repair, and absorb nutrients better. It works directly at the muscle level to help you build lean muscle and recover faster.What it is IGF 1