Mast cell activation syndrome (MCAS) affects more than 15% of the U.S. population but evades most practitioners’ radar. Just five years ago, it wasn’t even on my radar, despite already having 20 years of experience as a clinician at that time. The more I dug (similar to leaky gut and post-COVID syndrome), the more I found my patients were suffering from this disorder.
Eric Shadd, FDN-P
Eric Shadd is a functional nutritionist, but considers himself a “metabolic chaos detective,” using advanced lab tests and muscle testing to get to the root cause of clients’ chronic health concerns. He is the owner and operator of Thrivality in Annandale, Va. (http://www.Thrivality.com).