The top 8 allergens to introduce — and how to do it safely

For decades parents were told to delay allergens. Modern research has reversed that advice: introducing common allergens between 4 and 11 months can actually reduce a baby's risk of developing food allergies, sometimes dramatically.

The 'big eight' allergens responsible for over 90% of food-allergic reactions are: peanut, tree nut, egg, dairy, soy, wheat, fish, and shellfish.

Here's a calm, structured way to introduce them:

Start at home in the morning, when you can observe your baby for several hours and a doctor's office is open if needed. Avoid trying new allergens before bedtime.

Offer one allergen at a time, in a small amount — half a teaspoon is plenty. For peanut, mix smooth peanut butter into purée or warm water (never give whole nuts or chunks of nut butter; they're a choking hazard).

Wait 3 full days before introducing another new food. This window is long enough to spot most reactions, which usually appear within 2 hours but can be delayed.

Once a food has been tolerated, keep offering it regularly — at least once a week. Maintained exposure is what trains the immune system. Drop a food entirely and the protective effect can fade.

Watch for signs of reaction: hives, swelling around the mouth or eyes, repeated vomiting, persistent coughing, or wheezing. Mild rashes around the mouth from acidic foods are usually irritation, not allergy. If you're unsure, log it in TinyTaste with severity and contact your pediatrician.

If your baby has severe eczema, an existing food allergy, or a strong family history, talk to your pediatrician before introducing peanut. They may recommend allergy testing first.

This phase can feel intense, but every food you successfully introduce is a small win — and a smaller world of foods your baby will never have to fear.