When people ask about the best peptides for muscle building, most are starting in the wrong place. There's no peptide that directly builds muscle. At least not one I'm willing to use. Sermorelin, Ipamorelin, and Tesamorelin are all growth hormonereleasing peptides, which are designed to stimulate the bodys own production of growth hormone rather than replacing it directly like Ipamorelin Vs Sermorelin: Decoding The Differences In Peptide Therapies Ipamorelin vs. Sermorelin: Differences and Benefits