How to Introduce Allergens to Your Baby — A Simple Week by Week Approach

If you grew up being told to wait until age one or two for peanuts and eggs, the new guidance can feel a little startling. The research has shifted, and it has shifted for a beautiful reason: early introduction can actually help reduce the risk of allergies developing.

Why early introduction matters

Between around six and twelve months, your baby's immune system is especially receptive to learning that these foods are safe. Introducing allergens early and regularly — not avoiding them — is now what is recommended by most major health bodies.

The nine allergens to introduce

• Egg
• Peanut
• Tree nuts (almond, cashew, walnut)
• Fish
• Wheat
• Dairy (cow's milk)
• Soy
• Sesame
• Shellfish

How to do it — one at a time

Introduce one new allergen at a time, ideally in the morning or early afternoon so you have the rest of the day to watch your baby. Offer a small amount, then wait. If there is no reaction, offer a little more the next day, and continue building up.

What reactions to watch for

Most reactions, when they happen, happen within two hours. Watch for hives or rash around the mouth or body, swelling of the lips or face, vomiting soon after eating, or any sign of breathing difficulty.

When to seek help

Mild rash around the mouth — call your GP for advice. Any swelling, breathing trouble, or full body hives — call emergency services straight away. If your family has a strong history of allergies, talk to your GP or paediatrician before starting.

This part of the journey can feel scary, but you are doing something genuinely protective for your baby. One little spoon at a time. You have got this.