What is MCAS?
Mast cells are immune cells found throughout the body, especially in the skin, gut and airways. In Mast Cell Activation Syndrome they release chemical mediators such as histamine too easily and too often, producing allergy-like symptoms in several body systems, often without a clear allergy.
Because the symptoms are so varied and overlap with anxiety, irritable bowel syndrome and allergies, MCAS can be hard to recognize, and people often wait a long time for a diagnosis. MCAS is real, and your reactions deserve to be taken seriously.
Common MCAS triggers
- Mold and water-damaged buildings
- Certain foods, especially high-histamine foods, and alcohol
- Fragrances, smoke and chemicals
- Heat, exercise, friction or pressure
- Infections, stress and hormonal shifts
How Dr. Madeira approaches MCAS
MCAS care starts gently, because people with sensitive mast cells often react to treatments as well as triggers.
- Identify triggers and root causes, including environmental exposures such as mold, gut health, infections and hormones.
- Calm the response with personalized nutritional and botanical support and, where helpful, a structured, temporary low-histamine diet trial. When medications are appropriate, Dr. Madeira coordinates with your other doctors.
- Support the nervous system, because stress and mast cells feed each other, with sleep support and mindfulness practices.
- Reintroduce and rebuild, widening your diet and tolerance as your system settles.
MCAS often travels with mold illness and CIRS, so Dr. Madeira looks at the whole picture rather than one symptom at a time.