Mast Cell Activation Syndrome (MCAS)

ME-pedia overview

MCAS is not unusual in folks with ME or folks with POTS. Me-pedia has an overview page on it.

The Mastocytosis Society

Lots of information on MCAS, including this incredibly helpful page on medication treatments.



This German page is not the easiest or most updated site, BUT it has the best histamine food list I’ve come across.


Advocacy and Education

Mast Cell Action

An advocacy and support organization



Naughty Little Mast Cells

Is a personal blog and resource website that includes recipes.


Support Groups

Mast Cell Activation Syndrome Support (Facebook)