Which foods can cause allergies to babies, when they start solid foods (6 months)?

Different strokes..: There are foods that tend to be more allergenic, but for any individual infant, the rules may not hold true. That's why you introduce foods one at a time, and watch and see if any type of reaction. But in general, seafood, nut containing foods, citrus and eggs and egg containing foods have more potentials towards allergies and should be introduced later rather than sooner.