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Keeping a diary of diet and symptoms
The purpose of a diet/symptom diary is to record detailed information about food intake and obtain an accurate record of when, how often, and how long any symptoms are experienced. Sometimes, the information is collected over a period of weeks. The information is then reviewed to see if symptoms reliably occur in association with the ingestion of a particular food. When the symptoms are significant and occur infrequently, keeping a diary may be as simple as writing down everything eaten for several hours before each reaction. The information obtained may identify foods that are worthy of further investigation. On the other hand, reviewing the diary may remove a food from suspicion.
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