How common are food allergies as causes of symptoms?
About 60% of all undiagnosed symptoms are due to food allergies according to James Breneman, MD, former Chairman of the Food Allergy Committee of the American College of Allergy (now the American College of Allergy and Immunology), in his 1978 book, Basics of Food Allergy. (Remember, that’s not 60% of all diseases, but 60% of symptoms as yet undiagnosed.) So the concept of food allergies being a major problem in the United States has been around for a while now. Any part of your body may be affected by food allergies. An abbreviated list of the most common symptoms identified by Dr.