When To Introduce Common Allergens To Babies: Peanuts, Eggs, Dairy - The Safe Timeline

Most babies can start peanut, egg, dairy, wheat, soy and fish around 6 months of age, once ready for complementary feeding. Introducing these foods early and continuing to offer them regularly may help reduce food allergy risk. Babies with severe eczema or an existing food allergy should be evaluated by a paediatrician before peanuts are introduced.

When Should Babies Start Eating Allergenic Foods?

Current medical guidance has changed significantly over the past decade.

Instead of delaying allergenic foods, experts now recommend introducing them around 6 months of age, but not before 4 months, once your baby is developmentally ready for complementary feeding.

The Indian Academy of Pediatrics (IAP) recommends that complementary feeding should begin at around 6 completed months while continuing breastfeeding. There is no evidence that delaying allergenic foods beyond this age prevents food allergies.

Similarly, the World Health Organization (WHO) recommends exclusive breastfeeding for the first six months, followed by nutritionally adequate complementary foods alongside continued breastfeeding.

Key takeaway: Waiting until 1 year to introduce eggs or peanuts is no longer recommended for most babies.

What Are The Most Common Food Allergens?

The foods responsible for most childhood food allergies include:

1. Peanut

2. Egg

3. Cow's milk

4. Wheat

5. Soy

6. Tree nuts

7. Fish

8. Shellfish

9. Sesame

These foods account for the majority of IgE - mediated food allergies seen in childhood.

Safe Tmeline For Introducing Common Allergens

Cow's milk should not replace breast milk or infant formula as the main drink before 12 months, although dairy products like yoghurt and cheese are appropriate after complementary feeding begins.

Why Has Medical Advice Changed?

For many years, parents were advised to delay foods like eggs and peanuts.

Research over the last decade showed the opposite may be true.

Introducing allergenic foods during infancy, rather than avoiding them for prolonged periods, appears to support the developing immune system and may reduce the likelihood of food allergy in many children.

The National Institutes of Health (NIH) points to the LEAP (Learning Early About Peanut Allergy) trial, which found that early peanut introduction significantly reduced peanut allergy in infants at high risk when introduced under appropriate medical guidance.

This shift has changed pediatric feeding recommendations worldwide.

Should Babies With Eczema Follow the Same Timeline?

Not always.

Babies who have:

1. severe eczema

2. an existing food allergy

3. a sibling with significant food allergies (risk assessment may be needed)

may require individualised advice before introducing peanut.

According to NIH peanut allergy prevention guidelines, infants with severe eczema or egg allergy may benefit from evaluation by their paediatrician or allergy specialist before peanut introduction.

This does not necessarily mean peanut should be delayed. In many cases, it should actually be introduced earlier under medical supervision.

How Do You Safely Introduce Allergenic Foods?

1. Introduce only one new allergenic food at a time

2. Offer one allergenic food by itself.

3. Wait about 2 to 3 days before introducing another new allergen.

4. This makes it easier to identify the cause if your baby develops a reaction

5. Start with a very small amount

6. Begin with approximately ¼ to ½ teaspoon

7. If there is no reaction, gradually increase the quantity over subsequent meals.

8. Give allergenic foods during the daytime

9. Offer new foods when your baby is healthy, an adult can observe them for the next 2 hours, and medical care is accessible if needed

10. Avoid introducing a new allergen just before bedtime.

11. Choose safe textures

12. Never give babies foods that pose a choking risk.

Avoid:

1. Whole peanuts

2. Chunky peanut butter

3. Whole nuts

4. Large pieces of hard foods

Offer:

1. Smooth peanut butter diluted with warm water or breast milk

2. Finely powdered peanuts mixed into porridge

3. Well-cooked egg

4. Mashed fish without bones

Texture safety is just as important as allergy safety.

Should allergenic foods be given only once?

No, one introduction is not enough. Once a baby tolerates an allergenic food, it should continue to be included regularly as part of a varied diet. Regular exposure helps maintain tolerance. Stopping the food for many months after successful introduction may not provide the same benefit.

What does an allergic reaction look like?

Most reactions occur within minutes to two hours.

Symptoms may include:

Mild reactions

1. Hives

2. Mild facial rash

3. Itching

4. Lip swelling

Moderate reactions

1. Repeated vomiting

2. Persistent coughing

3. Widespread hives

4. Facial swelling

Severe reactions (Anaphylaxis)

1. Difficulty breathing

2. Wheezing

3. Pale or floppy appearance

4. Persistent cough

5. Swelling affecting breathing

6. Loss of consciousness

Anaphylaxis is a medical emergency. Seek immediate emergency medical care if severe symptoms occur.

Should I delay allergenic foods if allergies run in the family?

Usually, no.

Having a parent or sibling with allergies does not automatically mean allergenic foods should be delayed.

The Indian Academy of Paediatrics and international pediatric allergy guidelines do not recommend delaying allergenic foods simply because of family history.

If your baby has severe eczema or has already reacted to another food, speak with your paediatrician before introducing peanut or other high-risk allergens.

Common myths about allergen introduction

Myth: Waiting until age one prevents allergies.

Fact: Current evidence does not support delaying allergenic foods beyond around 6 months for most babies.

Myth: Babies should never eat eggs before their first birthday.

Fact: Fully cooked eggs can usually be introduced around 6 months as part of complementary feeding.

Myth: Peanuts should only be introduced after age three.

Fact: Delaying peanut introduction may actually increase allergy risk in susceptible children.

Myth: If my baby spits out a food once, they are allergic.

Fact: Babies often reject new tastes and textures. Food refusal alone is not an allergy.

The advice on allergenic foods has changed. Rather than delaying foods like peanut, egg and dairy, current evidence supports introducing them around 6 months of age, once your baby is ready for complementary feeding. As per the Indian Academy of Pediatrics, delaying allergenic foods has not been shown to prevent food allergies. Introducing age-appropriate forms safely, continuing to offer them regularly after successful introduction, and seeking medical advice for babies with severe eczema or existing food allergies are the best-supported strategies for helping babies develop healthy eating patterns while minimizing allergy risk.

Medical Sources

• Indian Academy of Pediatrics (IAP): Complementary feeding recommendations and infant nutrition guidance.

• World Health Organization (WHO): Infant and young child feeding recommendations.

• National Institutes of Health (NIH): Peanut allergy prevention guidelines and evidence from the LEAP trial.

• Centers for Disease Control and Prevention (CDC): Infant feeding guidance and complementary feeding resources.

• HealthyChildren.org (American Academy of Pediatrics): Guidance on introducing allergenic foods and infant nutrition.