Reducing food allergies in infants

Key points about reducing food allergies in infants

  • So many tamariki seem to have food allergies these days.
  • However, there are things you can do that may help prevent your child developing one.
  • With food allergy, eating even a tiny amount can cause a reaction. 
  • Most reactions will be mild to moderate, but in some cases it can lead to life-threatening symptoms, known as anaphylaxis.
  • Researchers aren’t sure why the number of children with food allergies is on the rise, but it is. 
  • Following the tips below may reduce the risk of your infant developing a food allergy. 


Boy with allergy saying no to peanuts being offered
Print this page

IMPORTANT: If your infant or child has a serious reaction such as a swelling mouth, tongue or lips, or they have difficulty breathing or if they collapse, call 111 immediately for an ambulance.

Allergies tend to run in families, so a baby with parents who have allergies is at has a higher chance of developing food allergy. Some babies develop food allergy even though there is no family history of allergy. Common foods that can cause allergic reactions are peanuts, eggs, fish and shellfish, cow’s milk (dairy), wheat, soy, seeds and tree nuts.

Baby being fed in highchair

Image credit: Canva

1. Include allergenic foods in your diet

Pregnant and breastfeeding mothers should eat a healthy, balanced diet, including allergenic foods. Cutting allergenic foods out will not prevent food allergy in your infant. There is some evidence that omega-3 fatty acids (found in oily fish) during pregnancy and breastfeeding may help prevent eczema in early life, so try to include up to 3 serves of oily fish per week.

2. Breastfeed if you can

Breastfeeding has many health benefits for infants. If breastfeeding is not possible, or your baby is partially breastfed, a commercial infant formula should be used for the first 12 months of age. 

3. Introduce solid food around 6 months of age

When your baby is ready, at around 6 months but not before 4 months, start to introduce a variety of solid foods, starting with iron-rich foods, while continuing breastfeeding. 

4. Expose your child to a variety of foods

All infants should be given the common food allergens (peanut, tree nuts, cow’s milk, egg, wheat, soy, sesame, fish and shellfish), including smooth peanut butter/paste, cooked egg (not raw), dairy and wheat products within their first year of life, unless they are already allergic to the food. Introduce one food at a time every 2 to 3 days (give them foods the family usually eats). 

It's important to be aware that children under the age of 5 years can choke very easily so don't give them small, hard foods they can choke on or inhale (breathe in). This includes nuts, large seeds, and chunks of foods (eg, apple, celery or carrot) and grapes and dried fruit. Smooth peanut butter and cooked or finely grated vegetables are fine. Read more about how to prepare foods for young tamariki to eat safely.(external link) 

If your child already has an egg allergy or other food allergies or severe eczema, you should discuss how to do this with your doctor. If your child has severe eczema and/or egg allergy, regular peanut intake before 12 months of age could reduce the risk of developing peanut allergy. 

5. Get medical advice 

If your baby has an allergic reaction to a food, seek medical help. Keep the food out of the baby’s diet until you have discussed this with your GP and possibly been referred to a specialist.

Don't remove food groups such as dairy or wheat products from your child's diet unless your child has an immediate reaction to the food. If this happens, it is important to get specialist advice including from a dietitian.

Remember, your infant or child could develop a food allergy at any time, regardless of what steps you take. If this happens, stop the food and see your doctor.

Introducing food and allergy prevention(external link) Australasian Society for Clinical Immunology and Allergy 
Food allergy(external link) Allergy New Zealand
Allergy prevention(external link) Australasian Society of Clinical Immunology & Allergy (ASCIA)
Foods that pose a higher choking risk for children under five years(external link) Health New Zealand | Te Whatu Ora


Supporting young children to eat well(external link) Health Promotion Agency, NZ, 2021
Starting solids(external link) Health Promotion Agency, NZ, 2021


screenshotchildren eating well

Supporting young children to eat well

Health Promotion Agency, NZ, 2021

screenshot starting solids

Starting solids

Health Promotion Agency, NZ, 2021

Need help now?

Healthline logo in supporters block

Need to talk logo

Healthpoint logo

Credits: Healthify Editorial Team

Reviewed by: Penny Jorgensen, Allergy Advisor, Allergy New Zealand

Last reviewed:

Page last updated: