What causes nut allergy in babies

Food contains additives for numerous reasons, such as to preserve it, to help make it safe to eat for longer, and to give colour or texture.

What causes nut allergy in babies

All food additives go through strict safety testing before they can be used. Food labelling must clearly show additives in the list of ingredients, including their name or «E» number and their function, such as «colour» or «preservative».

A few people own adverse reactions to some food additives, love sulphites, but reactions to ordinary foods, such as milk or soya, are much more common.

Read more about food colours and hyperactivity.

Further information

Sheet final reviewed: 24 July 2018
Next review due: 24 July 2021

If you ponder your kid is having an allergic reaction to a food, seek medical advice urgently as symptoms can worsen rapidly.

If breathing is affected, call triple zero (000) and enquire for an ambulance.


How will I know if my kid has a food allergy?

An allergic reaction can consist of 1 or more of the following:

  1. wheezing and shortness of breath
  2. diarrhoea or vomiting
  3. a cough
  4. runny or blocked nose
  5. itchy throat and tongue
  6. swollen lips and throat
  7. itchy skin or rash
  8. sore, red and itchy eyes

In a few cases, foods can cause a severe allergic reaction (anaphylaxis) that can be life-threatening.

What causes nut allergy in babies

Get medical advice if you ponder your kid is having an allergic reaction to a specific food.

Don’t be tempted to experiment by cutting out a major food, such as milk, because this could lead to your kid not getting the nutrients they need. Talk to your health visitor or GP, who may refer you to a registered dietitian.


Peanut allergy

Your kid has a higher risk of developing a peanut allergy if they already own a known allergy (such as eczema or a diagnosed food allergy), or there’s a history of allergy in their immediate family (such as asthma, eczema or hay fever).

There is evidence that having peanuts regularly before 12 months can reduce the risk of developing peanut allergy.

If your kid already has an egg allergy, another food allergy or severe eczema, talk to your doctor before you give peanuts or food containing peanuts to your kid for the first time.

If you would love to eat peanuts or foods containing peanuts (such as peanut butter) while breastfeeding, you can do so unless you’re allergic to them or your health professional advises you not to.

Avoid giving your kid peanuts and foods containing peanuts before the age of 6 months.

What causes nut allergy in babies

Foods containing peanuts include peanut butter, peanut (groundnut) oil and some snacks. Little children are at a higher risk of choking on little objects, so avoid giving whole peanuts or nuts to children under age 5-years-old.

Read food labels carefully and avoid foods if you’re not certain whether they contain peanuts.


Introducing foods that could trigger allergy

When you start introducing solid foods to your baby from around 6 months ancient, introduce the foods that can trigger allergic reactions one at a time and in extremely little amounts so that you can spot any reaction.

These foods are:

  1. foods that contain gluten, including wheat, barley and rye
  2. cows’ milk
  3. eggs (eggs without a red lion stamp should not be eaten raw or lightly cooked)
  4. shellfish (don’t serve raw or lightly cooked)
  5. nuts and peanuts (serve them crushed or ground)
  6. soya
  7. seeds (serve them crushed or ground)
  8. fish

See more about foods to avoid giving babies and young children.

These foods can be introduced from around 6 months as part of your baby’s diet, just love any other foods.

Once introduced and if tolerated, these foods should become part of your baby’s usual diet to minimise the risk of allergy.

What causes nut allergy in babies

Evidence has shown that delaying the introduction of peanut and hen’s eggs beyond 6 to 12 months may increase the risk of developing an allergy to these foods.

Lots of children outgrow their allergies to milk or eggs, but a peanut allergy is generally lifelong.

If your kid has a food allergy, read food labels carefully.

Avoid foods if you are not certain whether they contain the food your kid is allergic to.


Food additives

Food contains additives for a variety of reasons, such as to preserve it, to assist make it safe to eat for longer and to give colour or texture.

All food additives go through rigorous assessments for safety before they can be used.

What causes nut allergy in babies

Food labelling must clearly show additives in the list of ingredients, including their name or number and their function, such as ‘colouring’ or ‘preservative’.

A few people own adverse reactions to some food additives, but reactions to ordinary foods, such as milk or soy, are much more common.


Introducing allergens

It’s recommended that when your baby is ready, at around 6 months (but not before 4 months), introduce a variety of solid foods, starting with iron-rich foods, while continuing breastfeeding.

Hydrolysed (partially and extensively) baby formula is not recommended for the prevention of allergies.

When you start introducing solids (weaning), introduce the foods that commonly cause allergies one at a time so that you can spot any reactions. Don’t delay introducing a food just because it’s considered a common allergen. These foods include: milk, eggs, wheat, nuts, seeds, fish and shellfish. However, don’t introduce any of these foods before 6 months.

There is evidence that infants should be given allergenic solid foods including peanut butter, cooked egg and dairy and wheat products in the first year of life.

What causes nut allergy in babies

This includes infants at high risk of allergy.

Don’t be tempted to experiment by cutting out a major food, such as milk, as this could lead to your kid not getting the nutrients they need. Talk to your doctor, who may refer you to a registered dietitian.


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What causes nut allergy in babies