Baby Food Introduction Schedule Calculator
without the guesswork.
Baby Solid Food Allergen Wait Period — Use CDC's one-food 3–5 day reference only after readiness, high-risk peanut and reaction gates are checked. Uses a focused calculator with visible assumptions. Inputs stay in your browser.
CDC advises one single-ingredient food at a time initially and a 3–5 day interval before another new food, while introducing allergenic foods alongside other complementary foods rather than delaying them by default.
Context matters.
- Trouble breathing, severe swelling, collapse, blue or pale color, or a rapidly worsening reaction needs emergency help; follow the child's emergency allergy plan if one exists.
- Hives, repeated vomiting, cough, facial swelling or another possible reaction needs prompt clinician guidance before the food is offered again.
- For severe eczema or egg allergy, discuss peanut introduction with the child's clinician. A three-to-five-day interval is not a home challenge protocol.
Sources & scope
This page shows the source trail, jurisdiction and review date alongside the result. Always confirm time-sensitive rules with the linked authority.
What to know before using the result.
Why does the calculator show a three-to-five-day observation window?
CDC advises introducing one single-ingredient food at a time and waiting three to five days before another new food so a possible reaction is easier to identify.
Should common allergenic foods be delayed?
CDC says potentially allergenic foods can be introduced with other foods when the baby is developmentally ready. A clinician may give a different plan for a high-risk infant.
What if a baby has severe eczema or an egg allergy?
Early peanut introduction may need clinician-guided testing and timing. Do not use a generic wait-period calculator to replace that individualized plan or to assess a reaction.