Why early allergen introduction matters
Research, including the landmark LEAP study, has shown that introducing common allergens early (around 6 months) may significantly reduce the risk of developing food allergies. The American Academy of Pediatrics now recommends early introduction rather than delaying.
The key is doing it systematically — and keeping records so your pediatrician can review what happened and when.
The top 9 allergens to introduce
- Peanut — try thinned peanut butter mixed into puree
- Egg — well-cooked scrambled egg in small amounts
- Cow's milk — in cooked foods or yogurt (not as a drink before 12 months)
- Wheat — soft bread, pasta, or infant cereal
- Soy — tofu or soy-based foods
- Tree nuts — nut butters thinned and mixed (never whole nuts)
- Fish — soft, flaked, well-cooked fish
- Shellfish — pureed or finely minced shrimp or crab
- Sesame — tahini mixed into puree or hummus
Always introduce one new allergen at a time and wait 2-3 days before introducing the next. This makes it possible to identify which food caused a reaction.
Symptoms to watch for
Most reactions appear within minutes to 2 hours. Common mild reactions include:
- Hives or red, itchy skin
- Mild swelling around the mouth
- Vomiting or diarrhea
- Fussiness or discomfort
Seek immediate medical attention for difficulty breathing, swelling of the face or throat, sudden lethargy, or widespread hives. These may indicate anaphylaxis.
Logging symptoms with timestamps is critical. Reactions can be delayed, and without a written record it's easy to forget exactly when symptoms started relative to the meal.
How to track allergen introductions
- Log the new food with the exact time you offered it
- Note the form (puree, solid, mixed with another food)
- Log any symptoms immediately when you notice them
- Record the time gap between meal and symptom
- Continue logging for 2-3 days before introducing the next allergen
Tummy Trace does all of this in one timeline — meals, symptoms, and allergen tags together — so your pediatrician sees the full picture at your next visit.
FAQ
When should I introduce allergens to my baby?
Current guidelines recommend introducing common allergens around 6 months of age. Consult your pediatrician first, especially if your baby has eczema or a family history of allergies.
What are the top allergens to introduce to babies?
The top 9 are peanut, egg, cow's milk, wheat, soy, tree nuts, fish, shellfish, and sesame. Introduce one at a time over several days.
How long should I wait between introducing new allergens?
Most pediatricians recommend waiting 2-3 days between each new allergen so you can clearly attribute any reaction to the specific food.
What symptoms should I watch for after introducing an allergen?
Common mild reactions include hives, rash, vomiting, or diarrhea. Severe reactions (difficulty breathing, swelling of face/throat) require immediate medical attention.