Outline:
Mast cells play a critical role in immune surveillance, inflammation, and host defense. However, dysregulation of mast cell activity can lead to widespread systemic symptoms affecting the skin, gastrointestinal tract, cardiovascular system, nervous system, and immune function. Mast Cell Activation Syndrome (MCAS) has increasingly been recognized in patients presenting with complex chronic illnesses including dysautonomia, irritable bowel syndrome, allergies, autoimmune disease, and chronic inflammatory conditions.
This lecture reviews mast cell physiology, the mechanisms of mast cell activation, and the clinical presentation of mast cell activation disorders. Diagnostic criteria for MCAS will be discussed, including laboratory markers and differential diagnosis. The presentation will also explore the relationship between mast cells and conditions such as POTS, gastrointestinal disorders, and chronic inflammatory states.
The second half of the lecture focuses on clinical management strategies commonly used in naturopathic medicine. These include dietary interventions, nutrients, botanical medicine, and methylation support involved in histamine metabolism pathways. Nutrients such as vitamin C, vitamin B6, magnesium, quercetin, zinc, omega-3 fatty acids, glutathione, and methyl donors will be reviewed in relation to mast cell stabilization and histamine degradation pathways including DAO and HNMT.
Evidence-based botanical medicines such as stinging nettle, butterbur, turmeric, green tea extract, and licorice will also be discussed. Diet strategies including low-histamine diets, elimination diets, and anti-inflammatory diets will be explored.
Participants will gain practical clinical strategies to assess mast cell involvement in complex chronic cases and develop integrative treatment plans addressing mast cell stabilization, histamine metabolism, and underlying root causes.
Time Breakdown (90 minutes total):
0–10 min
Introduction to mast cell biology
- Role in immune surveillance and inflammation
10–20 min
Mechanisms of mast cell activation
- Triggers: immune, environmental, neurological
- Mediator release (histamine, cytokines, leukotrienes)
20–30 min
Clinical presentation of MCAS
- Multisystem involvement (GI, skin, cardiovascular, CNS)
- Associated conditions (POTS, IBS, autoimmunity)
30–40 min
Diagnostic framework
- Diagnostic criteria for MCAS
- Laboratory markers and differential diagnosis
40–50 min
Histamine metabolism pathways
- DAO and HNMT pathways
- Genetic and environmental influences
50–60 min
Nutritional cofactors in histamine metabolism
- Vitamin C, B6, magnesium, zinc
- Glutathione and methylation support
60–70 min
Botanical medicine for mast cell stabilization
- Quercetin, stinging nettle, butterbur, turmeric
- Mechanisms of action (mast cell stabilization, anti-inflammatory effects)
70–80 min
Dietary strategies
- Low-histamine diet
- Elimination and anti-inflammatory diets
80–90 min
Clinical application and case discussion
- Integrative treatment plans
- Root cause approach
Presented by Dr Carissa Doherty ND