A couple of good links:http://aappolicy.aappublications.org/cgi/content/full/pediatrics;121/1/183http://www.webmd.com/parenting/baby/baby-food-nutrition-9/introducing-new-foods"...or if there is a strong family history of food allergies, then you will want to introduce certain foods later than you would if your baby were not at risk for food allergy"http://en.wikipedia.org/wiki/Food_allergy"One of the most common food allergies is a sensitivity to peanuts, a member of the bean family. Peanut allergies may be severe, but children with peanut allergies sometimes outgrow them.""Food allergy is thought to develop more easily in patients with the atopic syndrome, a very common combination of diseases: allergic rhinitis and conjunctivitis, eczema and asthma.[3] The syndrome has a strong inherited component; a family history of allergic diseases can be indicative of the atopic syndrome." - in regards to the family history