Bendy Bodies with Dr. Linda Bluestein

Mast Cells to Microplastics with Dr. Anne Maitland and cohost Dr. Dacre Knight (Ep 191)

Apr 9, 2026
Dr. Dacre Knight, a physician specializing in EDS, HSD, POTS, and mast cell disorders, and Dr. Anne Maitland, an allergy/immunology researcher focused on mast cell disease and epithelial barriers, discuss how modern pollutants like microplastics and chemicals weaken skin, gut, and lung barriers. They explore the nerve–mast cell connection, why hypermobile people are extra sensitive, and practical swaps to reduce environmental insults.
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INSIGHT

Epithelial Barrier Breakdowns Drive Allergy Rise

  • Modern industrialization has rapidly increased epithelial border insults causing a rise in allergic and hypersensitivity disorders.
  • Changes in cleaners, processed foods, indoor living, and air within ~50 years have confused ancestral defenses, per Dr. Anne Maitland.
INSIGHT

Nerves Sound The Alarm Before Mast Cells

  • Somatosensory nerves detect toxins first and then recruit mast cells, making nerves the true first line of defense.
  • Nobel-winning work (David Julius et al.) shows nerves have receptors for toxins and dust mites that set off mast cell responses.
INSIGHT

Modern Chemicals Hijack Ancient Immune Responses

  • Modern exposures like microplastics and 'forever chemicals' trigger a parasite-like immune response, misdirecting defenses evolved for different threats.
  • Mast cells release potent chemicals intended for parasite/venom defense but now react to these novel insults.
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