IGF 1 LR3 (Insulin like Growth Factor 1 Long R3) is often called the "Holy Grail" of muscle building peptides because of its potent anabolic effects. In a Med Spa context, it is typically sought out The GH IGF 1 axis in ageing and longevity Nature Reviews Endocrinology IGF 1: Miracle Hormone or Health Hazard? Diet vs Disease Dietary and pharmacological modification of the insulin IGF 1 system: exploiting the full repertoire against cancer Oncogenesis QK041 Recombinant human bovine porcine IGF 1 LR3 protein