LL-37 is a 37-amino-acid cathelicidin-derived antimicrobial peptide that also modulates innate immunity, wound healing and inflammation, making it a versatile subject in host-defense research. Its dual antimicrobial and immunomodulatory activities support studies in infection biology and regenerative medicine. The peptide is supplied as a white lyophilized powder at >=99% HPLC purity in a sealed vial. Complete documentation and flexible ordering are available for research groups. As a China-based manufacturer and exporter, we offer direct pricing without middlemen, making us a cost-effective source for research chemicals and peptides. Long-term cooperation is welcome, and framework agreements with fixed pricing can be established for ongoing procurement needs.