Dr. Jamie Lewis and Becca Pabona, RN break down sermorelin — what it is, how it works, and why it's become one of the most talked-about peptides in longevity and performance medicine. They cover the science behind growth hormone decline, the clinical evidence on sleep and body composition, safety and sourcing, realistic timelines for results, and how sermorelin pairs with GLP-1 medications to preserve muscle during weight loss.