LL-37 is a powerful antimicrobial peptide that helps the body fight infections and boost immune function. It naturally occurs in the body as part of the first line of defense against bacteria, viruses, and fungi. By increasing LL-37 levels, you may be giving your immune system a head start in fighting off illness. LL-37 is often taken by those who are immunocompromised or looking to prevent recurrent infections. Its still being researched for broader uses, but many early adopters report fewer sick days and faster recovery from everyday illnesses.