yoonhangkimmd.bsky.social
@yoonhangkimmd.bsky.social
Board certified preventive medicine physician. University of Arizona fellowship grad. 20+ years prescribing LDN for chronic pain, autoimmune conditions & complex cases. Author. International speaker. Helping patients find answers.
Still struggling with MCAS despite antihistamines and mast cell stabilizers?
There may be more options.
After years treating complex MCAS, I've explored repurposed medications and individualized low-dose approaches.
I wrote an article about these options.
Interested? Reply "MCAS" for the link.
There may be more options.
After years treating complex MCAS, I've explored repurposed medications and individualized low-dose approaches.
I wrote an article about these options.
Interested? Reply "MCAS" for the link.
October 10, 2026 at 9:51 AM
Still struggling with MCAS despite antihistamines and mast cell stabilizers?
There may be more options.
After years treating complex MCAS, I've explored repurposed medications and individualized low-dose approaches.
I wrote an article about these options.
Interested? Reply "MCAS" for the link.
There may be more options.
After years treating complex MCAS, I've explored repurposed medications and individualized low-dose approaches.
I wrote an article about these options.
Interested? Reply "MCAS" for the link.
Rapamycin in ME/CFS: Promise, Proof, and the Path Forward www.ifmsynergy.com/rapamycin-in...
Rapamycin in ME/CFS: Promise, Proof, and the Path Forward
An Evidence-Based Clinical Review
Yoon Hang Kim, MD, MPH
Board-Certified in Preventive Medicine | Integrative & Functional Medicine Physician
October 9, 2026
About Dr. Kim
Yoon Hang Kim, MD, MPH ...
www.ifmsynergy.com
October 9, 2026 at 9:30 PM
Rapamycin in ME/CFS: Promise, Proof, and the Path Forward www.ifmsynergy.com/rapamycin-in...
PICL for Craniocervical Instability: Promise, Plausibility, and the Evidence Gap www.ifmsynergy.com/picl-for-cra...
PICL for Craniocervical Instability: Promise, Plausibility, and the Evidence Gap
PICL for Craniocervical Instability:
Promise, Plausibility, and the Evidence Gap
Yoon Hang Kim, MD, MPH
Board-Certified in Preventive Medicine | Integrative & Functional Medicine Physician
October...
www.ifmsynergy.com
October 9, 2026 at 9:30 PM
PICL for Craniocervical Instability: Promise, Plausibility, and the Evidence Gap www.ifmsynergy.com/picl-for-cra...
Herbal & Integrative Protocol for Candida Vulvovaginitis www.ifmsynergy.com/herbal-integ...
Herbal & Integrative Protocol for Candida Vulvovaginitis
A Clinician’s Guide to Evidence-Graded Botanical Adjuncts
Yoon Hang Kim, MD, MPH
Board-Certified in Preventive Medicine | Integrative & Functional Medicine Physician
About Dr. Kim: Dr. Kim is a boa...
www.ifmsynergy.com
October 8, 2026 at 6:10 PM
Herbal & Integrative Protocol for Candida Vulvovaginitis www.ifmsynergy.com/herbal-integ...
October is Breast Cancer Awareness Month: Why integrative oncology is personal for me www.ifmsynergy.com/october-is-b...
October is Breast Cancer Awareness Month: Why integrative oncology is personal for me
Yoon Hang Kim MD
October Newsletter
Breast Cancer Awareness Month
Why integrative oncology is personal for me
Dear friends,
October is Breast Cancer Awareness Month, and I want to share something...
www.ifmsynergy.com
October 7, 2026 at 1:55 PM
October is Breast Cancer Awareness Month: Why integrative oncology is personal for me www.ifmsynergy.com/october-is-b...
Breast Cancer Awareness Month is personal for me — two family members, thirty years apart. The second time, I had three decades of integrative oncology experience to offer someone I love.
I've gathered my breast cancer resources into one newsletter. Comment or DM me and I'll send it. 💗
I've gathered my breast cancer resources into one newsletter. Comment or DM me and I'll send it. 💗
October 7, 2026 at 1:52 PM
Breast Cancer Awareness Month is personal for me — two family members, thirty years apart. The second time, I had three decades of integrative oncology experience to offer someone I love.
I've gathered my breast cancer resources into one newsletter. Comment or DM me and I'll send it. 💗
I've gathered my breast cancer resources into one newsletter. Comment or DM me and I'll send it. 💗
Integrative Oncology Update Evidence Based Review of Mistletoe (Viscum album) in Cancer Care www.ifmsynergy.com/mistletoe-vi...
Mistletoe (Viscum album) in Cancer Care
An Academic Chapter
Mistletoe (Viscum album) in Cancer Care
Pharmacology, Evidence by Outcome, the MISTRAL Correction, Immune Checkpoint Combinations, and Clinical Positioning in 2026
Yoon Hang Kim...
www.ifmsynergy.com
October 6, 2026 at 6:04 AM
Integrative Oncology Update Evidence Based Review of Mistletoe (Viscum album) in Cancer Care www.ifmsynergy.com/mistletoe-vi...
Change of Season is considered an optimal time to "tune up" our immune system. Here is how: www.ifmsynergy.com/immune-suppo...
October 5, 2026 at 7:08 PM
Change of Season is considered an optimal time to "tune up" our immune system. Here is how: www.ifmsynergy.com/immune-suppo...
In Chinese medicine, the change of seasons (right about now) is considered an important phase when immune systems can be tuned for optimal performance for coming colder weather. Immune Support from an Integrative Medicine Perspective www.ifmsynergy.com/immune-suppo...
Immune Support from an Integrative Medicine Perspective
What Science, Chinese Herbal Medicine, and Medicinal Mushrooms Actually Offer
Yoon Hang Kim MD
Yoon Hang Kim MD is board-certified in Preventive Medicine and practices integrative and functional med...
www.ifmsynergy.com
October 5, 2026 at 6:51 PM
In Chinese medicine, the change of seasons (right about now) is considered an important phase when immune systems can be tuned for optimal performance for coming colder weather. Immune Support from an Integrative Medicine Perspective www.ifmsynergy.com/immune-suppo...
Functional Medicine Approach to Understanding and Treating Neuropathy - Nerve-Generated Pain www.ifmsynergy.com/neurop/
Neuropathy - Nerve-Generated Pain
Conventional Diagnosis and Treatment, Functional Medicine Adjuncts, and the Role of Low-Dose Naltrexone
Yoon Hang Kim, MD, MPH
Board-Certified in Preventive Medicine | Integrative & Functional Medic...
www.ifmsynergy.com
October 5, 2026 at 12:34 PM
Functional Medicine Approach to Understanding and Treating Neuropathy - Nerve-Generated Pain www.ifmsynergy.com/neurop/
October Newsletter: MCAS Month at Yoon Hang Kim MD Links to MCAS articles, MCAS: Epidemic in Plain Sight book link, and new MCAS Academic Chapter: www.ifmsynergy.com) www.ifmsynergy.com/october-news...
Integrative Functional Medicine and LDN Community
Integrative Functional & Lifestyle Medicine + LDN & More to help us survive, overcome, and thrive beyond our medical challenges. MCAS, CFS, ME, Chronic Pain, Fibromyalgia, Autoimmune and More
www.ifmsynergy.com
October 4, 2026 at 3:11 PM
October Newsletter: MCAS Month at Yoon Hang Kim MD Links to MCAS articles, MCAS: Epidemic in Plain Sight book link, and new MCAS Academic Chapter: www.ifmsynergy.com) www.ifmsynergy.com/october-news...
MCAS isn't a standalone diagnosis. It's a common node — where Lyme, mold illness, long COVID, and autoimmunity converge into immune hyperreactivity.
I wrote a framework explaining why this matters clinically.
www.ifmsynergy.com/mcas-as-a-co...
What upstream triggers are you seeing most?
I wrote a framework explaining why this matters clinically.
www.ifmsynergy.com/mcas-as-a-co...
What upstream triggers are you seeing most?
September 26, 2026 at 1:34 PM
MCAS isn't a standalone diagnosis. It's a common node — where Lyme, mold illness, long COVID, and autoimmunity converge into immune hyperreactivity.
I wrote a framework explaining why this matters clinically.
www.ifmsynergy.com/mcas-as-a-co...
What upstream triggers are you seeing most?
I wrote a framework explaining why this matters clinically.
www.ifmsynergy.com/mcas-as-a-co...
What upstream triggers are you seeing most?
The "Clogged Drain" of the Brain: Demystifying the Complex Triad of Intracranial Hypertension, Jugular Compression, and Craniocervical Instability www.ifmsynergy.com/the-clogged-...
The "Clogged Drain" of the Brain: Demystifying the Complex Triad of Intracranial Hypertension, Jugular Compression, and Craniocervical Instability
NEUROLOGY & NEUROSURGERY
A multidisciplinary expert panel from Northwell Health breaks down how three interconnected conditions create a vicious cycle — and what the latest surgical thinking looks l...
www.ifmsynergy.com
September 25, 2026 at 8:58 PM
The "Clogged Drain" of the Brain: Demystifying the Complex Triad of Intracranial Hypertension, Jugular Compression, and Craniocervical Instability www.ifmsynergy.com/the-clogged-...
Functional Medicine Approaches to EDS and Hypermobile EDS (hEDS) www.ifmsynergy.com/functional-m...
Functional Medicine Approaches to EDS and Hypermobile EDS (hEDS)
Functional Medicine Approaches to
EDS and Hypermobile EDS (hEDS)
A Clinician’s Deep Dive
Compiled September 2026 | Revised Edition | For Clinical Reference
by Yoon Hang Kim MD
Dr. Yoon Hang Kim i...
www.ifmsynergy.com
September 25, 2026 at 7:34 PM
Functional Medicine Approaches to EDS and Hypermobile EDS (hEDS) www.ifmsynergy.com/functional-m...
I wrote an article comparing two SIBO diets — Fast Tract (Robillard) vs. the Cedars-Sinai Low-Fermentation Diet (Pimentel).
They share a goal but differ in structure, evidence, and how they handle hydrogen vs. methane/IMO.
Reply "SIBO" and I'll send the link.
They share a goal but differ in structure, evidence, and how they handle hydrogen vs. methane/IMO.
Reply "SIBO" and I'll send the link.
September 24, 2026 at 2:02 PM
I wrote an article comparing two SIBO diets — Fast Tract (Robillard) vs. the Cedars-Sinai Low-Fermentation Diet (Pimentel).
They share a goal but differ in structure, evidence, and how they handle hydrogen vs. methane/IMO.
Reply "SIBO" and I'll send the link.
They share a goal but differ in structure, evidence, and how they handle hydrogen vs. methane/IMO.
Reply "SIBO" and I'll send the link.
Fast Tract Diet vs. Low-Fermentation Diet for SIBO and IMO: What the Evidence Actually Supports www.ifmsynergy.com/fast-tract-d...
Fast Tract Diet vs. Low-Fermentation Diet for SIBO and IMO: What the Evidence Actually Supports
CLINICAL NUTRITION
Fast Tract Diet vs. Low-Fermentation Diet for SIBO and IMO:
What the Evidence Actually Supports
By Yoon Hang Kim, MD, MPH | Board-Certified in Preventive Medicine | Integrati...
www.ifmsynergy.com
September 24, 2026 at 2:02 PM
Fast Tract Diet vs. Low-Fermentation Diet for SIBO and IMO: What the Evidence Actually Supports www.ifmsynergy.com/fast-tract-d...
Fecal Microbiota Transplantation: What We Know, What We Don't, and What's Coming www.ifmsynergy.com/fecal-microb...
Fecal Microbiota Transplantation: What We Know, What We Don't, and What's Coming
Fecal Microbiota Transplantation:
What We Know, What We Don't, and What's Coming
Yoon Hang Kim, MD, MPH
September 2026
Introduction
Fecal microbiota transplantation (FMT) is one of the most vivi...
www.ifmsynergy.com
September 20, 2026 at 7:57 PM
Fecal Microbiota Transplantation: What We Know, What We Don't, and What's Coming www.ifmsynergy.com/fecal-microb...
Integrative Oncology: Another Perspective www.ifmsynergy.com/integrative-...
Integrative Oncology: Another Perspective
CHAPTER
Integrative Oncology: Another Perspective
Yoon Hang Kim, MD, MPH
Board-Certified in Preventive Medicine | Integrative & Functional Medicine Physician
Integrative Oncology: Evidence-Based S...
www.ifmsynergy.com
September 17, 2026 at 11:23 PM
Integrative Oncology: Another Perspective www.ifmsynergy.com/integrative-...
Vitamin D Through a Functional-Medicine Lens:Beyond Bone: Hormonal Signaling, Immune Regulation, and the Dangers of Excess www.ifmsynergy.com/vitamin-d-th...
Vitamin D Through a Functional-Medicine Lens:Beyond Bone: Hormonal Signaling, Immune Regulation, and the Dangers of Excess
CHAPTER
Beyond Bone: Hormonal Signaling, Immune Regulation, and the Dangers of Excess
Yoon Hang Kim, MD, MPH
Board-Certified in Preventive Medicine
Integrative & Functional Medicine
Introducti...
www.ifmsynergy.com
September 12, 2026 at 8:59 PM
Vitamin D Through a Functional-Medicine Lens:Beyond Bone: Hormonal Signaling, Immune Regulation, and the Dangers of Excess www.ifmsynergy.com/vitamin-d-th...
Vitamin C From Antioxidant to Pro-Oxidant www.ifmsynergy.com/vitamin-c-fr...
Vitamin C From Antioxidant to Pro-Oxidant
CHAPTER
───────────────────────
Paracelsus and the Dose That Makes the Poison
Yoon Hang "John" Kim, MD, MPH
Board Certified in Preventive Medicine
Integrative & Functional Medicine
Abstract...
www.ifmsynergy.com
September 11, 2026 at 2:02 AM
Vitamin C From Antioxidant to Pro-Oxidant www.ifmsynergy.com/vitamin-c-fr...
The Double-Edged Sword of Vitamins: Deficiency, Functional Insufficiency, Therapeutic Dosing, and Toxicity www.ifmsynergy.com/the-double-e...
The Double-Edged Sword of Vitamins: Deficiency, Functional Insufficiency, Therapeutic Dosing, and Toxicity
CHAPTER
Yoon Hang Kim, MD, MPH
Board-Certified in Preventive Medicine
Integrative & Functional Medicine
University of Arizona Osher Fellow | UCLA Medical Acupuncture | IFM Scholar
“The dose m...
www.ifmsynergy.com
September 10, 2026 at 7:44 AM
The Double-Edged Sword of Vitamins: Deficiency, Functional Insufficiency, Therapeutic Dosing, and Toxicity www.ifmsynergy.com/the-double-e...
Low-Dose Naltrexone and Hormonal Health: What the Evidence Actually Shows www.ifmsynergy.com/untitled/
Low-Dose Naltrexone and Hormonal Health: What the Evidence Actually Shows
CLINICAL EDUCATION SERIES
Low-Dose Naltrexone and Hormonal Health:
What the Evidence Actually Shows
Yoon Hang Kim, MD, MPH
Board-Certified in Preventive Medicine | Integrative & Functional Medicin...
www.ifmsynergy.com
May 2, 2026 at 7:03 PM
Low-Dose Naltrexone and Hormonal Health: What the Evidence Actually Shows www.ifmsynergy.com/untitled/
I've started viewing MCAS less as a standalone diagnosis and more as "immune derangement syndrome"—the cumulative result of multiple immune hits over time. This reframe changes treatment completely. We address the whole picture, not just one piece.
February 1, 2026 at 1:40 AM
I've started viewing MCAS less as a standalone diagnosis and more as "immune derangement syndrome"—the cumulative result of multiple immune hits over time. This reframe changes treatment completely. We address the whole picture, not just one piece.
Before dosing LDN, I assess "endorphin reserve." How long sick? Restorative sleep? Energy levels? Patients with depleted reserves need different protocols—sometimes micrograms, not milligrams. Cookie-cutter medicine doesn't heal complex patients.
February 1, 2026 at 1:33 AM
Before dosing LDN, I assess "endorphin reserve." How long sick? Restorative sleep? Energy levels? Patients with depleted reserves need different protocols—sometimes micrograms, not milligrams. Cookie-cutter medicine doesn't heal complex patients.
The uncomfortable truth about LDN: roughly 1/3 of patients don't respond to standard protocols. After 20+ years of prescribing it, I've learned that acknowledging this isn't pessimism—it's the foundation for better outcomes. Here is the guide to the optimal dose. tinyurl.com/2avwfmc3
Finding Your LDN Sweet Spot: A Simple Guide to Optimal Dosing
Some of them aren't actually non-responders—they're people who started at a dose that was wrong for their body. They got side effects, felt worse, and gave up before LDN ever had a chance to work.
tinyurl.com
February 1, 2026 at 1:15 AM
The uncomfortable truth about LDN: roughly 1/3 of patients don't respond to standard protocols. After 20+ years of prescribing it, I've learned that acknowledging this isn't pessimism—it's the foundation for better outcomes. Here is the guide to the optimal dose. tinyurl.com/2avwfmc3