Host Defense Peptides (HDPs) are small proteins produced by the immune system that play a crucial role in defending the body against infections. They are found in various organisms, including humans, and help to combat bacteria, viruses, and fungi. HDPs work by disrupting the membranes of these pathogens, leading to their destruction. In addition to their antimicrobial properties, Host Defense Peptides also have roles in regulating immune responses and promoting wound healing. Researchers are studying these peptides for potential therapeutic applications, including new treatments for infections and inflammatory diseases, due to their ability to enhance the body's natural defense mechanisms.