All people do best with the Feingold approach of removing artificial additives, preservatives and colourings from the diet. Some individuals have sensitivities to naturally occuring chemicals in foods such as salicylates, amines, phenols and oxalates.
Oxalates for examples are found in Nuts, Spinach, Celery, Green Beans, kiwi, lemon, lime and orange peel, berries, most seeds, soy, whole wheat, kamut, oatmeal, popcorn, spelt, ground flour, wheat bran, wheat germ, buckwheat, parsley, spinach, rhubarb and more.
Dr. Campbell-McBride, author of Gut And Psychology Syndrome, believes that these chemicals are high in antioxidants which are helping the body to detox and as a result create behavioural symptoms. Some health professionals recommend using these foods in moderation to help detox.