Reactions to foods and  food chemicals in food  can play a key role in triggering such problems as migraines, fibromyalgia, irritable bowel syndrome and other medical problems.
 
Determining these triggers can be frustrating since symptoms can occur 4 to even 96 hours after a food or chemical is ingested.  In addition the types of food that trigger medical problems are highly individual and usually involve more than one food or food chemical.
 
Avoiding these foods and food chemicals has been demonstrated to improve not only the medical condition but also the overall sense of well being.