Early exposure to food and food allergy in children

Question I have been under the impression that infants should avoid potential allergenic foods such as nuts, cow’s milk, and eggs in order to avoid developing allergic reactions. What advice should I give parents regarding the introduction of food in infancy and the development of food allergy?Answer There is no evidence that delaying the introduction of any specific food beyond 6 months of age helps to prevent allergy. A recent Canadian Paediatric Society statement recommends no delay in the introduction of food in infancy. Recent research also appears to suggest that early introduction of potentially allergenic foods (at 4 to 6 months of age) might actually provide a form of protection and help prevent allergy, but more research is needed.Food allergy is a subject of great concern for parents and clinicians caring for children. The incidence of food allergy has increased dramatically over the years, affecting 1% to 10% of children worldwide.^1,2 In the United States, the prevalence of reported food allergy in children younger than 18 years of age increased 18% (P < .01) and ambulatory visits caused by food allergy tripled between 1993 and 2006 (P < .01).³ In Canada, the prevalence of food allergy is approximately 7% based on self-reported data.⁴ The economic consequences of this health concern are substantial, as the diagnosis and management of food allergy come at a cost to health care systems.