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Table 1 Proposed terminology

From: Debates in allergy medicine: food intolerance does exist

• Hypersensitivity: a reaction to an ingested food, whatever the mechanism causing the symptoms
• Food allergy: a reaction to a food that can be explained by an immune mediated mechanisms, IgE-mediated or non-IgE mediated
• Intolerance: a reaction to a food that is caused by a deficiency of a disaccharidase
• Food related symptom: any symptom that is/seems caused by a food but for which no causing mechanism can be indicated