Food allergy is more prevalent in children than in adults. Food allergy can cause symptoms on the skin, involve the respiratory system, the gastrointestinaal tract and the cardiovascular system. Food can also cause anaphylactic reactions. The diagnosis of food allergy is based on history and clinical findings. Treatment is avoidance of the causative food, however, long-term food avoidance can lead to nutrition deficiency and may cause decreased quality of life.