MCAS
A Functional Medicine Approach to Mast Cell Activation Syndrome (MCAS)
An Evidence-Based Guide to LDN, Ketotifen, and Integrative Therapies Updated Edition — October 2026 Yoon Hang Kim, MD, MPH Board-Certified in Preventive Medicine | Integrative & Functional Medicine Physician About Dr. Kim Yoon Hang Kim, MD, MPH, is board-certified in Preventive Medicine with more than 20 years of clinical