Depression and food intolerance: a single case study.

The detection and treatment of psychological dysfunction related to food intolerance with particular reference to the problem of objective evaluation is discussed. The case is described of a woman with chronic depression who exhibited classic signs of food intolerance and yet had remained untreated for over 10 years. A non-invasive procedure involving systematic monitoring of diet and symptoms, systematic eliminations and a double-blind, placebo-controlled re-introduction is described. Long-term follow-up revealed maintenance of marked improvements in psychological and physical functioning.