Tears, saliva, and perspiration contain an enzyme called that helps kill or inhibit bacteria.

Tears, saliva, and perspiration contain an enzyme called lysozyme that helps kill or inhibit bacteria. Lysozyme works by breaking down the peptidoglycan layer of bacterial cell walls, which is crucial for their structural integrity. When the cell wall is compromised, bacteria are unable to maintain their shape and eventually undergo lysis, leading to their destruction. This enzyme plays a vital role in the body's innate immune system, providing a first line of defense against pathogens that enter through mucosal surfaces or are in contact with the skin. Lysozyme is particularly important in protecting the eyes, mouth, and skin from bacterial infections.