In general it is recommended to introduce allergens within the first year of life. You should start Ready. Set. Food! Stages 1-3 Mix-Ins once your baby is between 4 and 11 months of age. For babies older than 1 year we offer products with allergens pre-mixed inside such as snacks and Organic Baby Oatmeal as an easy way to maintain any previous exposure to allergens. If you haven’t introduced allergens and your little one is older than 1 year, please consult with your pediatrician prior to use.