Experts previously believed that introducing peanut butter or any sort of nut product at an early age could lead to nut allergies. But new research in 2015
found that introducing babies to nut products may actually lower their risk for a peanut or nut allergy. The AAP recommends
talking with your pediatrician about introducing nut products to your baby, once he is eating solid foods. If your baby doesn't have any food allergies or risk factors, your doctor will probably advise feeding him a thin layer of creamy (not chunky) peanut butter on a cracker or bread, or foods that have peanut butter in them. Never give whole peanuts or nut pieces to a child under age 4 because of the choking risk.
If your child is at high risk for a peanut allergy or other food allergies (because of a family history or if he has an existing food allergy or eczema), your doctor might recommend doing allergy testing before introducing nut products, or feeding your child nut products at the doctor's office in case of an allergic reaction.