Peptides & Muscle Gain a medical perspective. Peptide therapy is increasingly being discussed in the context of muscle recovery, lean mass development, and injury rehabilitation. When used judiciously, case by case, and under Therapeutic Peptides in Aesthetic, Metabolic and Endocrine Conditions: Effects, Safety, Clinical Applications, and Future Perspectives Nordic Labs IGF 1 LR3 0.1mg Peptides The Science Behind IGF 1 LR3: What The Studies Show UK SARMs Insulin Like Growth Factor 1 (IGF 1) Physiopedia