BabyBites Guide
How to introduce allergens to your baby safely
Common allergenic foods can usually be introduced from around 6 months without deliberate delay, using one age-appropriate food at a time; some higher-risk babies need clinician guidance.
When and how should allergenic foods be introduced?
Common allergenic foods can usually be introduced after a baby is developmentally ready for complementary foods, at about 6 months, without deliberately delaying them. Introduce one allergenic food at a time in an age-appropriate texture, such as well-cooked egg or smooth peanut butter thinned into another food; whole nuts and thick spoonfuls of nut butter are choking hazards. Begin with a small amount when the baby is well and a caregiver can observe them, then keep a tolerated food in the family's regular routine. Guidance is different for some higher-risk infants. The National Institute of Allergy and Infectious Diseases recommends clinician evaluation before peanut introduction for babies with severe eczema, egg allergy, or both. Families should also seek individualized advice for an existing food allergy, previous reaction, feeding difficulty, premature birth, or another health concern. BabyBites provides education and planning support, not allergy diagnosis or personalized medical care.
Primary evidence: American Academy of Pediatrics: When to Introduce Common Food Allergens; NIAID: Addendum Guidelines for the Prevention of Peanut Allergy. Definitions are available in the BabyBites feeding glossary.
When should you introduce allergens to a baby?
Common allergenic foods can usually be introduced at about 6 months, once a baby is developmentally ready for complementary foods, without deliberately delaying them. Some higher-risk infants need a clinician’s guidance before peanut or other allergen introduction.
Current US guidance supports introducing age-appropriate forms of common allergenic foods when a baby is ready for complementary foods. If your baby has severe eczema, an existing food allergy, or a strong family history, talk to your pediatrician or an allergist first, they may recommend testing or introducing certain foods under guidance.
What are the top 9 food allergens?
Most food-allergic reactions come from these nine foods. BabyBites tracks all nine in its Allergen Introduction Coach:
| Allergen | Baby-safe way to offer |
|---|---|
| Peanut | Smooth peanut butter thinned with water or mixed into purée |
| Egg | Well-cooked, mashed or in an omelette strip |
| Milk (dairy) | Full-fat yogurt or cheese (not cow’s milk as a drink under 12 months) |
| Tree nuts | Smooth nut butters thinned, never whole nuts |
| Soy | Tofu, mashed; or soy yogurt |
| Wheat | Iron-fortified wheat cereal or soft bread |
| Fish | Well-cooked, flaked, bones removed |
| Shellfish | Well-cooked, finely chopped or puréed |
| Sesame | Tahini thinned with water or mixed into food |
How do you introduce an allergen safely?
Offer one new allergen at a time, in a small amount, earlier in the day so you can watch your baby for several hours. Wait a few days before adding the next new allergen. Once a food is tolerated, keep it in the diet regularly to maintain the benefit.
- Pick a day when your baby is healthy and you can observe them.
- Start with a tiny taste; if all is well, gradually increase.
- Introduce only one new allergen per few days so you can identify any trigger.
- Keep tolerated allergens in the routine, regular exposure matters more than a single try.
What are the signs of an allergic reaction?
Mild reactions may include a few hives, redness around the mouth, mild swelling, vomiting, or loose stools. These usually appear within minutes to a couple of hours.
Call emergency services immediately for signs of a severe reaction (anaphylaxis): trouble breathing, swelling of the lips or tongue, widespread hives, repeated vomiting, floppiness, or pale or blue skin. This is a medical emergency.
How BabyBites helps with allergen introduction
The Allergen Introduction Coach walks you through the top 9 allergens one at a time, suggests baby-safe forms and portions, and lets you log reactions and progress. Your saved allergy profile then flags relevant ingredients across every recipe and food-safety scan, so nothing slips through.
This guide is general educational information, not medical advice. If your baby has severe eczema, a known allergy, or a family history of food allergy, consult your pediatrician or allergist before introducing allergens.
Sources and further reading
This guide is educational. Use these primary sources alongside advice from your child's clinician for individual questions.
Put this guide to work
BabyBites turns this guidance into personalized, age-aware meals, safety checks, and weekly plans for your baby.