Beta-defensins are small proteins that play a crucial role in the immune system. They are part of the innate immune response, which is the body's first line of defense against pathogens like bacteria and viruses. These proteins are produced by various cells, including skin cells and immune cells, and they help to disrupt the membranes of harmful microorganisms, leading to their destruction. In addition to their antimicrobial properties, Beta-defensins also have a role in modulating inflammation and attracting immune cells to sites of infection. They are found in many tissues throughout the body, including the lungs and intestines, highlighting their importance in maintaining overall health and protecting against infections.