When ill, eating can be effective treatment. Fevers, faints, high blood pressure, even heart diseases can find remedy in diet. And the actions of prescribed medications are often modified by what we eat. Antibiotics, ulcer treatments, and blood thinners are examples of prescription drugs whose effectiveness can be altered by food. Interactions with medications could change as well.
Some people get sick after taking a new medication.
The same is true for food. Food allergies and intolerance are common. The altering of food by the insertion of new genes can create new immunological complications. Signs of nut allergy are produced by certain genetically manipulated foods that previously were harmless. In rare cases, children can develop mental retardation and die by simply eating a normal American diet.