Maximizing Muscle Recovery and Growth: The 10 Day Alternating MGF & IG Revolution Health & Wellness Personal experience with igf1 lr3 peptide? Explanation, Benefits, and Dosing for IGF LR3 Wittmer Rejuvenation Clinic Feeling Great with IGF 1 LR3 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