I have suffered from anxiety and Panic disorder , to make it short . I noticed an association between my allergy , hot weather , fermented foods and the frequency of my panic attacks . I realized the common thing here is histamine . I researched the subject , found a book called The Truth About Anxiety , Depression , Autism, ADHD , Depersonalization , Schizophrenia and Panic Disorder : HISTAMINE . Followed the diet in it and panic attacks completelet stopped , anxiety is getting better day by day . Some of the advice and the diet from the book is at : histamine-mental-disorders.com . Hope it helps you too.