How to Introduce Food Allergens to Your Baby's Diet
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How to Introduce Food Allergens to Your Baby's Diet

Parents are sometimes worried about giving common food allergens to their babies. However, it’s very unlikely that your baby will react so severely to a new food that they will need an emergency trip to the hospital. To put it further into perspective, food allergies occur in around 10% of babies in Australia. The chance of a severe allergic reaction such as anaphylaxis is much less. So the latest health guidelines in Australia recommend that all babies should be given foods that are common food allergens including peanut butter, cooked egg, dairy, wheat products in the first year of life.

How Should I Introduce Allergens?

Research shows it is best to offer these foods regularly starting at around six months of age (not before four months), and when your baby is ready. Smearing food on your baby’s skin will not help to identify possible food allergies, but you can rub a small amount of the food on the inside of your baby’s lip as a starting point. If there is no reaction after a few minutes, you can start giving small amounts. Introduce cooked egg (e.g. egg in muffins) and peanut butter in small amounts to start with. You can do this by mixing a small amount of hard-boiled egg or peanut paste (e.g. ¼ of a baby spoon) into your babies usually food (e.g. vegetable purée), and gradually increasing the amount (up to several spoons full). If the food is tolerated, continue to give this food regularly as part of their diet. It’s best to introduce new allergen foods one at a time, around two days apart so you can easily identify if any foods cause a reaction. If a food causes a reaction, stop feeding your child that food.

Do I Keep Feeding My Baby Allergenic Foods?

Once an allergen has been introduced safely, it is very important to keep offering and serving it in your baby’s foods at least twice a week to maintain tolerance.

What Reactions Should I Look Out For?

Allergic reactions usually appear very quickly, so parents can gauge reaction within a couple of hours following the meal.

Mild to moderate symptoms of food allergy include:

Swelling of the face, lips and/or eyes

Hives or welts on the skin

Abdominal pain and/or vomiting

Severe allergic reactions (anaphylaxis) to foods include:

Difficult/noisy breathing

Swelling of the tongue

Swelling/tightness in the throat

Difficulty talking and/or a hoarse voice

A wheeze or persistent cough

Loss of consciousness and/or collapse

Paleness and floppiness (in young children)

Less common symptoms of food allergy include colic, reflux, eczema, chronic diarrhoea and poor weight gain.

What Should I Do If My Baby Has a Reaction?

If any mild to moderate reactions occur, do not give any more of the food, observe your child’s symptoms and seek advice from your baby’s doctor. If your baby has what could be a severe allergic reaction, call an ambulance.

How Do I Prevent Allergies?

If possible, continuing to breastfeed during the period when solids are introduced may help reduce the risk of your baby developing allergies. The best way to prevent food allergies is to introduce the most common allergenic foods to all babies early in life. If not introduced in infancy, the risk of allergic reaction increases as a child gets older. This also applies to babies who are at higher risk of allergy due to eczema, other food allergies or an immediate family history of an allergic condition. Just remember the risk of a severe allergic reaction when eating a new food for the first time is extremely low and the majority of food allergies are not dangerous! Delaying the introduction might put children at higher risk of allergies, so it’s better to introduce early and not delay!


National Health and Medical Research Council. (2013). Eat for Health - Infant Feeding Guidelines Information for Health Workers. Available from:

ASCIA Guidelines.(2016). Infant feeding and allergy prevention. Available from: