Prevent Food Allergies You can prevent food allergies for your baby In recent decades there has been a significant rise in the number of food allergies with 1 in 13 children suffering from a food allergy today. New research shows that feeding allergenic foods early and often can help significantly reduce the risk of developing food allergies in infants by up to 80. 5 expert tips for parents on early allergen introduction Start Early Studies recommend starting as early as 46 months to align with a critical immune window giving your infant the best opportunity to develop a positive response to new foods. Introduce One Food At A Time Following pediatric guidelines only introduce allergenic foods one at a time every few days to determine how the baby is reacting to each new food.