Growth Hormone Peptides: The difference between Sermorelin, Ipamorelin, and Tesamorelin Sermorelin vs. Other Peptides: What Is the Difference? Some peptides focus on fat loss. Some focus on recovery. Ipamorelin is interesting because researchers study it for both. Why? Because it stimulates natural growth hormone pulses without strongly affecting other hormones. Peptides are having a moment. Influencers and wellness clinic doctors are selling experimental peptides as the next biohacking frontier for muscle, recovery, sleep, libido, longevity, you name it. CJC 1295. Ipamorelin. BPC 157.