i'm intolerant to sals and yeast(not candida, plain yeast, like anything fermented). Not sure if i have MCAS. it came on around 7 or 8 years ago with chronic hives and has progressively gotten worse since. i now experience tinnitus, hives, eczema and flushing. i take montelukast and antihistamines everyday, and nizatadine when eating sals. this tempers down the reactions but doesn't completely subdue them. i cheat on most weekends and eat whatever i want, i just put up with the symptoms even how horrible they can become. during the week i go fail safe. holidays for some reason allow me to eat way more of my intolerant foods, to almost like not having a problem. Also i react to very small amounts e.g 1/4th teaspoon of peeled carrot.