For most babies who are ready for solid foods, United States guidance does not recommend delaying peanut, well-cooked egg or other common allergens. One important exception is a baby with severe persistent eczema, an egg allergy or an immediate reaction to another food: speak with your pediatrician before introducing peanut because testing or a supervised first taste may be appropriate.
First decide whether your baby needs a personal plan
Most babies can try common allergens at home once they are developmentally ready for solid foods—usually around 6 months and not before 4 months. Readiness includes sitting with support, controlling the head and neck, bringing food to the mouth and swallowing rather than pushing every bite back out. Your pediatrician should help decide the timing if readiness is unclear.
Contact your pediatrician before the first peanut taste if your baby has severe persistent eczema, a known egg allergy or has reacted immediately to another food. Depending on the history, the clinician may recommend allergy testing, introduction in the office or a specific plan. Do not use a home skin test or give a tiny amount to “check” after a previous reaction.
Offer one simple, baby-safe form
Choose a time when your baby is well and you can observe them. Start with one new allergen in a simple form so that any reaction is easier to connect with the food. Do not mix several new allergens into the same first meal. Once a food is tolerated, keep it in the usual diet regularly rather than treating the first taste as a one-time test.
The food must also match your baby's feeding skills. Allergy prevention does not make whole nuts, sticky spoonfuls of nut butter or other choking hazards safe.
| Food | A safer first form | Avoid |
|---|---|---|
| Peanut or tree nut | Smooth nut butter thinned with warm water, breast milk, formula or a familiar puree; finely ground nut powder mixed into food | Whole nuts, nut pieces, chunky nut butter or a sticky spoonful |
| Egg | Fully cooked egg, mashed or cut to a texture your baby can manage | Raw or undercooked egg |
| Dairy | Plain pasteurized yogurt or an age-appropriate soft cheese texture | Unpasteurized products; cow's milk as the main drink before 12 months |
| Fish or shellfish | Fully cooked, with every bone or shell removed, then flaked, minced or pureed | Raw or undercooked seafood; pieces with bones or shell |
| Wheat, sesame or soy | A soft, simple food in a texture your baby already manages | Hard, dry or sticky pieces that increase choking risk |
Introduce, observe, then keep the food in rotation
Offer a small amount first and watch before giving more. The CDC suggests starting with single-ingredient foods and waiting 3–5 days between new foods; this makes it easier to identify the cause of a reaction. You do not need to delay foods your baby has already tolerated while trying another.
If the food is tolerated, include it routinely in an age-appropriate form. There is no single online dose or weekly schedule that fits every baby. Follow any plan from your pediatrician or allergist, especially when eczema, a known allergy, poor growth, swallowing difficulty or prematurity changes the feeding plan.
Know the signs of an allergic reaction
A reaction can begin within minutes or develop over the next few hours. Possible signs include hives, swelling of the lips or face, repeated vomiting, coughing, wheezing, a hoarse cry, sudden unusual sleepiness or a baby who becomes pale or floppy. Stop the food and contact your pediatrician promptly if you suspect a reaction. Do not offer the food again at home until a clinician tells you how to proceed.
Call 911 now for trouble breathing, swelling of the tongue or throat, blue or gray color, collapse, unresponsiveness, or symptoms affecting more than one body system—for example widespread hives together with repeated vomiting. If your baby already has an allergy action plan or prescribed epinephrine, follow it immediately; epinephrine is the first-line treatment for anaphylaxis.
Gagging is not the same as an allergy—but take choking seriously
Gagging is a protective feeding reflex and may be noisy; the baby may cough, retch or turn red while still moving air. Choking may be quiet because the airway is blocked. A baby who cannot breathe, cry or cough effectively needs immediate first aid and 911. Take an infant CPR and choking course before or soon after starting solids.
Neither gagging nor choking proves an allergy. Likewise, a rash or vomiting after a meal should not be dismissed as normal gagging. When you are uncertain, stop feeding and seek clinical advice.
Related United States guides
Use the month-by-month guides to place solid-food readiness alongside feeding, growth and your baby's US well-child schedule.
View references and primary sources
- American Academy of Pediatrics — When to Introduce Egg, Peanut Butter & Other Common Food Allergens12 June 2025 · accessed September 2026
- US Centers for Disease Control and Prevention — When, What, and How to Introduce Solid Foods14 April 2026 · accessed September 2026
- American Academy of Pediatrics — Peanut Allergy: What to Know About the Latest Prevention Guidelines6 January 2024 · accessed September 2026
- American Academy of Pediatrics — Anaphylaxis in Infants & Childrenaccessed September 2026
- National Institute of Allergy and Infectious Diseases — Peanut Allergy Prevention: Parent Summaryaccessed September 2026