Mast cell activation syndrome (MCAS) is acondition that occurs when mast cells, a typeof white blood cell, are overly active andrelease too many histamines and otherinflammatory chemicals in the body.Symptoms of MCAS can range from mild tosevere and can include digestive issues, skinrashes, headaches, and fatigue.One approach to managing MCAS is to follow alow-histamine diet, […]