Foods that result in severe reactions should only be reintroduced under the advice and guidance of the child's doctor. There are some allergies that are never outgrown and the only way to avoid the danger is to avoid the food. Peanuts and seafood are allergies that cause the most severe reactions. Extra caution should be used in introducing these foods. Waiting until the child is older, again, especially if family history indicates a potential danger, is the smartest way to avoid an allergic reaction.
Honey is dangerous for children under the age of one because of the danger of botulism poisoning.
Before the age of twelve months, a child's intestinal track is not mature enough to inhibit the growth of Clostridium botulinum, which is often found in honey. No honey, in any form, should be given to babies younger than one. High nitrate foods and water should be avoided. Nitrates in foods can turn to nitrites under inappropriate storage and handling conditions. Beets, carrots, spinach, collard greens, turnips and squash should not be home prepared and served to baby.