Secretory IgA

Secretory IgA (sIgA) is a type of antibody found primarily in mucosal areas such as the intestines, respiratory tract, and saliva. It plays a crucial role in the immune system by protecting these surfaces from infections by trapping harmful bacteria and viruses, preventing them from entering the body. Unlike other antibodies, sIgA can withstand harsh environments, making it essential for defending against pathogens right at the body's entry points. This layer of protection contributes significantly to our overall immune health, particularly in the gut, where it helps maintain a balanced microbiome and supports digestion.