Introducing Allergenic Foods to Your Baby: An Australian Parent's Guide

Once you have started solids, one of the biggest questions on every Australian parent's mind is how to go about introducing allergenic foods to their baby. It can feel daunting to hand your baby a smear of peanut butter or a spoonful of egg, especially with so much conflicting advice floating around online. The good news is that current Australian guidance is actually quite clear and reassuring. This guide walks through when to start, which foods matter most, how to introduce them safely, and what to watch for along the way.

Why introducing allergenic foods early matters

For a long time, parents were told to delay common allergenic foods to reduce the risk of food allergy. Research over the past decade has turned that advice around. Australian and international studies now show that introducing allergenic foods early, alongside other solids and in an age appropriate form, may actually help reduce the risk of your baby developing a food allergy. This is the position taken by the Australasian Society of Clinical Immunology and Allergy (ASCIA), which recommends introducing common allergenic foods in the first year of life, rather than delaying them.

If you have not yet started solids, it is worth reading our guide on when to start solids in Australia first, since allergen introduction happens once your baby is already managing other first foods comfortably.

When to start introducing allergens

ASCIA and Australian infant feeding guidelines suggest introducing allergenic foods from around six months, but not before four months, once your baby has started on a small number of other solid foods and is showing they can manage them without any problems. There is no need to introduce allergens on day one of solids. Most families start with easier first foods such as vegetables or iron rich foods, then bring in the common allergens over the following weeks.

Signs your baby is ready for solids

• They can sit up with little or no support and hold their head steady.
• They have lost the tongue thrust reflex that pushes food back out of the mouth.
• They show interest in food and reach for what is on your plate.
• They can move food to the back of the mouth and swallow, rather than only sucking.

If your baby was premature, has an existing medical condition, or you are simply unsure, check with your child health nurse or GP before you begin.

The common allergenic foods to introduce

In Australia, the foods responsible for most childhood food allergies are fairly consistent. ASCIA lists the following as the main ones to introduce during the first year:

• Peanut, usually offered as smooth peanut butter thinned with water or mixed into puree, never as whole nuts.
• Egg, well cooked, such as a hard boiled or well scrambled egg mixed into other food.
• Cow's milk products such as yoghurt or cheese, though cow's milk itself is not given as a main drink before 12 months.
• Wheat, offered as items like pasta, bread or wheat based cereal.
• Tree nuts such as cashew or almond, offered as smooth nut butter rather than whole nuts.
• Sesame, often given as tahini mixed into food.
• Soy, found in tofu and soy based products.
• Fish and shellfish, well cooked and offered in small, soft pieces.

You do not need to introduce every allergen in a single week. A common approach is to bring in one new allergenic food every few days, so that if a reaction does occur, it is easier to work out which food caused it.

How to introduce allergenic foods safely

A simple step by step approach

• Choose a time of day when you can watch your baby closely for a couple of hours afterwards, such as after breakfast rather than right before bed.
• Offer a small first taste, then wait ten to fifteen minutes before offering more, watching for any reaction.
• Once a food has been tolerated, keep offering it regularly, roughly two to three times a week, as regular exposure appears to matter as much as the first taste.
• Introduce one new allergenic food at a time rather than several at once.
• Have your baby sitting upright and supervised the whole time they are eating, as you would for any meal.

This is also where a decent bib earns its keep. New foods mean new textures, new colours and inevitably more mess on chins, necks and sleeves as your baby explores. Our full sleeve smock bibs have an inner collar flap to catch food before it reaches the neckline, a high set food catcher pocket, and a front hem split so it drapes properly over little legs. Abibi is run by two sisters from Adelaide, and we have sold more than 25,000 bibs in under 12 months, with parents telling us again and again that a proper smock style bib makes messy milestones like allergen introduction far less stressful to clean up after. You can see the full range, including short sleeve and sleeveless "less mess" styles, across the Abibi collection.

What to watch for

Most babies tolerate new allergenic foods without any issue, but it helps to know what a reaction can look like so you feel confident, not anxious, during this stage.

Mild to moderate reaction signs

• Hives or a raised, itchy rash around the mouth or on the body.
• Swelling of the lips, face or eyes.
• Vomiting or tummy upset soon after eating.

If you notice mild symptoms like these, stop offering that food and contact your GP or child health nurse for advice on what to do next and whether it is safe to try again.

Signs of a severe reaction (anaphylaxis)

• Difficulty or noisy breathing.
• Swelling of the tongue or tightness in the throat.
• Persistent dizziness, floppiness or paleness.
• Difficulty talking or a change in voice, in older babies.

Severe reactions are uncommon but can happen quickly. If you see any of these signs, call 000 for an ambulance immediately. It is worth knowing this in advance rather than looking it up in the moment, so consider reading ASCIA's action plan information or discussing an emergency plan with your GP before you start introducing allergens, particularly if your baby is in a higher risk group.

If your baby is at higher risk

Some babies have a higher chance of food allergy, including those with moderate to severe eczema or an existing egg allergy. If this applies to your baby, ASCIA recommends speaking with your GP, paediatrician or a specialist before introducing allergenic foods, since they may suggest introducing peanut and egg slightly earlier, from around four months, under medical guidance. This is genuinely worth a conversation rather than guesswork, so please check with your child health nurse or GP if you are at all unsure about your baby's individual risk.

Keeping mealtimes manageable

Between new textures, new flavours and a baby who is still learning to chew and swallow, allergen introduction can be one of the messier stretches of starting solids. If you are also exploring self feeding, our guide to baby led weaning for beginners has more on first foods and gear that helps. A well fitted smock bib, free from PVC, BPA and phthalates, with adjustable snaps to grow with your baby, takes a lot of the stress out of these early meals, so you can focus on watching your baby rather than watching the washing pile grow.

Frequently asked questions

What age should I start introducing allergenic foods?

Current Australian advice from ASCIA is to introduce common allergenic foods from around six months, once your baby has started solids and is managing a small number of other foods well. Babies at higher risk of allergy may be advised to start slightly earlier, from around four months, under medical guidance.

Should I introduce one allergen at a time?

Yes, it is generally recommended to introduce one new allergenic food at a time, a few days apart, so that if your baby does react, it is easier to identify which food was responsible.

Does delaying allergenic foods reduce the risk of allergy?

No, current evidence suggests the opposite. Delaying introduction of allergenic foods beyond the first year does not appear to reduce allergy risk, and early introduction may help lower it for some babies. This is why Australian guidelines now recommend introducing these foods within the first year rather than avoiding them.

What if my baby has eczema or a family history of allergies?

Babies with moderate to severe eczema or an existing food allergy are considered higher risk, and it is best to speak with your GP, paediatrician or a specialist before introducing allergenic foods, as they may recommend a specific plan or earlier introduction under supervision.

How do I know if my baby is having an allergic reaction?

Mild signs include hives, a rash around the mouth, or vomiting soon after eating. Severe signs, which need immediate emergency care, include difficulty breathing, swelling of the tongue or throat, or sudden floppiness and paleness. If you see severe signs, call 000 straight away.

This guide is general information only and is not a substitute for medical advice. For guidance about your own baby, including allergies, growth or feeding concerns, please check with your child health nurse, GP or an allergy specialist.