IGF 1 LR3 and Penis Enlargement: What the Evidence Actually Shows IGF 1 LR3 Dosage Guide: Benefits, Timing, and Results i313 Test and GH have a ceiling. Once IGF1 stops rising, pushing higher only adds side effects. That's when it makes more sense to pivot toward other anabolics that drive growth without compounding A Medical Review of IGF 1 LR3 Dosage, Side Effects and Safety Aspects