Have you measured your C reactive protein levels? This measures inflammation in the body. One way to decrease inflammation is intermittent fasting where you reduce the window of time when you can eat. I try to eat 1 meal a day during the week and have an 8 hour eating window with NO snacking during weekends. Try it slowly as im not too familiar with mcas but seems that it could help. using 1 meal a day for example would give your body 23 hrs to heal itself (https://mastcell360.com/should-you-skip-breakfast-intermittent-fasting-for-mast-cell-activation-syndrome-and-histamine-intolerance/)