Adopt a low histamine diet

 Avoid leftover foods, alcohol, cured meats, canned fish, pickled and fermented foods, berries, citrus, nuts, chocolate, dairy, yeast, soy sauce, tomatoes, vinegar, and preservatives. 

https://hoffmancentre.com/12-tips-living-mast-cell-activation-syndrome/#:~:text=1.,tomatoes%2C%20vinegar%2C%20and%20preservatives.