IGF 1 LR3 does not promote growth in late gestation growth restricted fetal sheep American Journal of Physiology Endocrinology and Metabolism American Physiological Society IGF 1 DES: Dosage, Benefits, and Comparison with IGF 1 LR3 i313 Expression of IGF 1 Isoforms after Exercise induced Muscle Damage in Humans: Characterization of the MGF E Peptide Actions In Vitro In Vivo IGF 1: The Secret to Supercharging Your Energy, Sleep, and Lean Muscle Mass Lifeforce mylifeforce.com IGF1 LR3 Peptide Anderson Longevity Clinic IGF 1 LR3 (Insulin like Growth Factor 1 Long R3) is a modified version of IGF 1 with a longer half life, making it more potent for stimulating muscle growth and recovery. IGF 1 plays a critical role