Did the US get peanut allergy prevention wrong for years? Should you give your child peanuts?

For decades many parents were told to avoid giving infants peanuts but now, the evidence is flipping that guidance and fast. Recent large-scale analyses show that introducing peanut-containing foods in infancy is linked to a big drop in peanut allergy risk. How did we end up telling parents the opposite for so long and what should you actually do today?

Early peanut exposure really seems to protect kids

A fresh, big medical-records study that analysed about 120,000 children under 3 found that infants who were fed peanut products had a 43% lower association with later peanut allergy compared with kids who were not exposed early. This paper was published recently in 2025 in Pediatrics and has already influenced how clinicians counsel families. David Hill, senior author and allergist at the Children’s Hospital of Philadelphia, put it plainly, “This monumental public health effort in food allergies




What the 2025 study in Pediatrics showed:

• Large, real-world medical-record analysis (120,000 children).
• Early introduction of peanut-containing foods associated with 43% lower risk of diagnosed peanut allergy.
• Authors highlight that earlier guideline shifts and education campaigns likely contributed to the change.

Why the advice changed and why it matters

The sea-change in thinking began with the landmark LEAP trial (Learning Early About Peanut Allergy) led by Gideon Lack and colleagues and published in 2015 the New England Journal of Medicine. LEAP randomised high-risk babies (severe eczema or egg allergy) to either regular peanut consumption from infancy or to avoidance. At age 5, the consumption group had an 81% lower rate of peanut allergy than the avoidance group. The striking result forced a rethink of avoidance strategies. The LEAP follow-ups (LEAP-On and LEAP-Trio) showed the protection persisted into later childhood and adolescence. As National Institutes of Health noted, early introduction “can provide lasting protection.”

As per the trial reporting and NIAID summary, early and regular peanut consumption dramatically lowered peanut allergy risk in high-risk infants. Randomised clinical trial show strong protective effect with 81% lower risk at age 5 while follow-ups showed durable benefit.

Did the US get it wrong earlier?

The short answer is yes, change was delayed for years. Historically, US guidance recommended delaying introduction of allergenic foods, including peanuts, up to the age of 3 years for high-risk infants. That advice, promulgated in the late 1990s and early 2000s, was not evidence-based and was later overturned. As the paediatric literature and guideline addenda make clear, delaying allergens did not prevent allergies and likely contributed to rising peanut allergy prevalence.

A 2017 addendum to the NIAID guidelines and subsequent AAP summaries reversed the stance and suggested that rather than avoiding, introduce age-appropriately with medical oversight for high-risk infants. In other words, earlier messaging around avoidance was well-intentioned but ultimately incorrect. Insufficient evidence exists for delaying introduction of solid foods, including potentially allergenic foods, beyond 4 to 6 months of age. Official guidance changed to support early introduction, especially for infants at higher risk, with medical supervision where needed.

The fact is that 5.8% of US children had a diagnosed food allergy in 2021, as per National Health Interview Survey. This implies that rising prevalence over decades makes prevention clinically and socially important.

Practical advice for parents

• Don’t self-prescribe: Check developmental readiness. As perabies should be able to sit with support and control their head/neck (usually around 4–6 months) before introducing solids. Discuss with your paediatrician, especially if your baby has severe eczema or an existing food allergy.
• Follow official, evidence-based guidance: NIAID/AAP recommend small, age-appropriate amounts of peanut-containing food (e.g., peanut butter thinned with breastmilk or formula, or Bamba-style peanut puffs) as initial exposures and to observe for reactions. Do this with your doctor if the child is high risk.
• Start small and watch closely: The NIAID advice is to offer a diluted, small portion and wait (e.g., 10–20 minutes) to check for immediate reactions. If severe eczema or prior anaphylaxis risk exists, speak to an allergist first where testing or supervised first feeding may be recommended.
• Keep peanut as part of diet (per trial protocols): LEAP showed benefit when infants consumed peanuts regularly through early childhood. Follow your clinician’s plan for ongoing inclusion as appropriate.
• If an allergy develops, don’t blame yourself: The science reduces risk but doesn’t eliminate it. Early introduction helps many children but not all. Support, testing and allergy management are still essential.

Bottom line

Yes, the early US advice to delay was a mistake but the course is corrected. History shows that earlier US guidance (delay until 3 years for certain foods) was issued in an era of limited evidence. That approach was later found to be unhelpful and likely contributed to rising peanut allergy rates.

The LEAP randomised trial of 2015 in NEJM and large observational follow-ups, including the recent 2025 Pediatrics analysis, have provided strong evidence that early and supervised introduction of peanut reduces the risk of peanut allergy and those benefits can last into adolescence. Official guidance now suggest introducing peanut-containing foods early, safely and under medical advice for high-risk infants.

Note: The information provided in this article is for educational purposes only and is not intended as medical advice. Always consult with a healthcare professional before starting any new medication or treatment.