Effects of Dietary Components on Mast Cells: Possible Use as Nutraceuticals for Allergies? How Mast Cells Contribute to Autoimmune Brain Disorders Mast cell activation syndrome (MCAS) is one of the most misunderstood conditions I see in my telehealth functional medicine clinic. and it's often the missing piece for people who feel like they're Ways to Address Perinatal Mast Cell Activation and Focal Brain Inflammation, including Response to SARS CoV 2, in Autism Spectrum Disorder