CJC 1295 + Ipamorelin vs IGF 1 LR3 for Muscle Growth IGF 1 LR3 forces receptor desensitization in 4 6 weeks, requiring months off before you can use it again. CJC 1295 and Ipamorelin amplify your natural IGF 1 LR3 in Aesthetic and Anti Aging Medicine: Benefits and Risks Hubmed Modulatory activity of testosterone on growth pattern and IGF 1 levels in vanishing testis syndrome: a case report during 15 years of follow up BMC Endocrine Disorders Springer Nature Link IGF 1 LR3 does not promote growth in late gestation growth restricted fetal sheep American Journal of Physiology Endocrinology and Metabolism American Physiological Society