top of page


The Cowden+ Support Program: A Comprehensive Guide to Herbal-Based Lyme Disease Management
INTEGRATIVE INFECTIOUS DISEASE Yoon Hang Kim, MD, MPH Board-Certified in Preventive Medicine | Integrative & Functional Medicine Physician Dr. Yoon Hang Kim is board-certified in Preventive Medicine and practices integrative & functional medicine. He completed the University of Arizona Center for Integrative Medicine Osher Fellowship under Dr. Andrew Weil and holds certifications in preventive medicine, medical acupuncture, and integrative and functional medicine. He is an IF

John Kim
4 days ago25 min read


When Eating Feels Like a Minefield: A Story of MCAS, Ketotifen, and Low-Dose Naltrexone
When Eating Feels Like a Minefield: A Story of MCAS, Ketotifen, and Low-Dose Naltrexone By Yoon Hang Kim, MD, MPH Board-Certified in Preventive Medicine | Integrative & Functional Medicine Physician 🎥 Watch the short version: MCAS, Ketotifen & LDN — a client story For people living with mast cell activation syndrome (MCAS), eating can feel like a minefield. A food that was fine last month triggers flushing, hives, gut pain, or brain fog today. Over time, many people respond

John Kim
Aug 184 min read


Functional Medicine in San Antonio: A Root-Cause Approach to Chronic Illness
Yoon Hang Kim, MD, MPH Board-Certified in Preventive Medicine | Integrative & Functional Medicine Physician www.directintegrativecare.com Medical Disclaimer: This article is for educational and informational purposes only and does not constitute medical advice, diagnosis, or treatment. The information presented reflects general principles of integrative and functional medicine and is not intended as a substitute for individualized care from a qualified healthcare provider. Al

John Kim
Aug 413 min read


Should You Power Through LDN Side Effects? Why the Answer Is Almost Always No
Yoon Hang Kim, MD, MPH Board-Certified in Preventive Medicine | Integrative & Functional Medicine Physician www.directintegrativecare.com Disclaimer: This blog post is intended for educational and informational purposes only. It does not constitute medical advice, diagnosis, or treatment. Low dose naltrexone (LDN) is used off-label for essentially all of the conditions discussed below; it is not FDA-approved for any of them. Always consult with a qualified clinician before st

John Kim
Aug 46 min read


How to Approach Your Doctor to Prescribe LDN
How to Approach Your Doctor About Low-Dose Naltrexone (LDN): A Patient's Guide to a Productive Conversation Written and medically reviewed by: Yoon Hang Kim, MD, MPH Board-Certified in Preventive Medicine | Integrative & Functional Medicine Physician www.directintegrativecare.com Disclaimer: This article is intended for educational and informational purposes only and does not constitute medical advice, diagnosis, or treatment. Low-dose naltrexone (LDN) is used off-label for t

John Kim
Apr 28, 202214 min read
bottom of page