Allergen Introduction Safety
Common allergens can usually enter the diet once solids have begun and baby is developmentally ready, but the form, timing, and follow-up matter.
Bottom line
Introduce common allergens one at a time in baby-safe forms. If tolerated, keep them in regular rotation. For severe eczema, existing egg allergy, or prior reactions, ask your clinician before peanut or other high-risk introductions.
Which foods are common allergens
Common allergenic foods include cow’s milk products, egg, peanut, tree nuts, soy, wheat, sesame, fish, and shellfish. These can be offered in baby-safe forms once solids are underway unless your clinician has given different instructions.
Avoid unsafe forms: whole nuts, thick nut butter, large rubbery egg pieces, salty cheese chunks, or fish with bones. Thin, mash, flake, shred, or mix into moist foods.
Pace allergen introductions deliberately
Choose a day when your baby is well and you can observe. Offer a small amount first, then continue if there is no immediate concern. Avoid introducing multiple new common allergens in the same meal at the beginning.
Watch for hives, swelling, repeated vomiting, coughing, wheezing, breathing changes, or unusual lethargy. Seek urgent care for breathing difficulty, severe swelling, or multi-system reactions.
Maintenance matters after tolerance
Tolerating an allergen once is not the same as keeping it familiar. If a food is tolerated, include it periodically in safe forms so it remains part of the normal diet.
Peanut guidance is more specific for high-risk infants. The NIAID prevention guidance grew from evidence that early peanut-containing foods reduced peanut allergy in selected infants, but higher-risk babies should be assessed by a clinician.
How this appears in Solid Start
Food details flag common allergen categories, suggest safe serving forms, and let families log tolerated foods and reactions without treating the app as medical diagnosis.