The Human Lab Rats Injecting Themselves with Peptides Office for Science and Society McGill University Can peptides like sermorelin, IGF 1 LR3, and GHS boost muscle growth? Maybe. Are they safe? We don't know. These compounds boost natural growth hormone (GH) and IGF 1 levels, key drivers of muscle IGF 1 LR3 does not promote growth in late gestation growth restricted fetal sheep American Journal of Physiology Endocrinology and Metabolism American Physiological Society Explanation, Benefits, and Dosing for IGF LR3 Wittmer Rejuvenation Clinic A Medical Review of IGF 1 LR3 Dosage, Side Effects and Safety Aspects Effects of Growth Hormone on Adult Human Gonads: Action on Reproduction and Sexual Function Zhou 2023 International Journal of Endocrinology Wiley Online Library