MCAS
A Functional Medicine Approach to Mast Cell Activation Syndrome (MCAS)
An Evidence-Based Guide to LDN, Ketotifen, and Integrative Therapies Yoon Hang Kim, MD, MPH Mast Cell Activation Syndrome (MCAS) is a complex and often underdiagnosed condition in which mast cells—an essential part of the immune system—become dysregulated and release mediators like histamine, prostaglandins, and cytokines inappropriately. This