When you first start thinking about introducing solid foods to your baby, it can feel like stepping into completely unknown territory. Which foods are safe to offer first? Which ones might trigger a reaction? For many years, parents across the Netherlands, Germany, Belgium, Denmark, Norway, and Sweden were told to keep allergenic foods well away from young babies, believing that early exposure would increase the risk of developing a lasting allergy. Science has moved on dramatically since then. Today, major European and international health organisations are recommending something that might surprise you: introducing common allergens early and consistently is now considered one of the most effective tools parents have for protecting their child from food allergies. This guide walks you through what the current research says, when to start, how to introduce the key allergens safely at home, and what to watch for along the way.
What Has Changed About Allergy Prevention Advice?
For decades, the standard advice in many European countries was to delay the introduction of foods like peanuts, eggs, fish, and tree nuts until after a baby's first birthday. The reasoning at the time was that a young immune system might overreact to these proteins and develop a lasting sensitivity. We now know that this thinking was not only incorrect but may actually have contributed to the rise in childhood food allergies seen across Europe in recent decades.
The most authoritative guidelines currently available, including those from the European Society for Paediatric Gastroenterology, Hepatology and Nutrition (ESPGHAN), the European Academy of Allergy and Clinical Immunology (EAACI), and the World Health Organization, all agree on one key point: there is no scientific justification for deliberately delaying the introduction of allergenic complementary foods beyond six months of age. These organisations now actively encourage early introduction for all infants, not just those considered at elevated risk.
The evidence behind this shift is substantial. The most influential piece of clinical research is the Learning Early About Peanut Allergy trial, widely known as the LEAP study. This landmark trial followed 640 infants aged between four and eleven months who were considered at high risk for developing a peanut allergy, either because of severe eczema, an existing egg allergy, or both. The results were striking: infants who began eating peanut products regularly during early infancy were more than 81 percent less likely to develop a peanut allergy compared to those who avoided peanuts completely. A follow-up study called the LEAP Trio, published in 2024, extended these findings further. It showed that children who had consumed peanuts regularly from infancy through to age five remained 74 percent less likely to have a peanut allergy at age six, even after a full year during which they had not eaten peanuts at all. The window of protection created by early introduction was remarkably durable.
Sweden is one country that has already reflected this evidence in national guidance. Revised infant feeding guidelines in Sweden now actively support the early introduction of allergenic foods including milk, egg, nuts, fish, and legumes as part of a healthy and varied infant diet, regardless of family allergy history.
When Is the Right Time to Start?
Most current guidelines recommend that solid foods, including allergenic ones, should be introduced at around six months of age and not before four months. Before the four-month mark, a baby's digestive and immune systems are simply not ready to handle solid foods safely. Between four and six months, infants who are at higher risk of allergy, those with severe eczema or a known food allergy already identified, may in some cases benefit from slightly earlier allergen introduction, though this should always be done in discussion with a paediatrician or allergy specialist.
Signs Your Baby Is Ready for Solid Foods
Before you introduce any new food, it is important to confirm that your baby is developmentally ready for the transition to solids. A baby who is ready will typically be able to sit upright with only a little support and hold their head steady without wobbling. They will show a clear interest in food, perhaps leaning forward toward your plate or reaching out to grab what you are eating. They will also have lost the tongue thrust reflex that caused younger babies to automatically push anything placed in their mouth straight back out again, and they will be able to move small amounts of food toward the back of their mouth and swallow. Most babies arrive at this point at around six months, though individual variation is perfectly normal. If you have any concerns, your health visitor, midwife, or family doctor can offer guidance.
The Top Allergens to Introduce and How to Do It Safely
The European Union recognises fourteen major food allergens, and the ones that most commonly trigger allergic reactions in infants are peanuts, eggs, cow's milk, tree nuts such as cashews, almonds and walnuts, fish, shellfish, sesame, soy, and wheat. Introducing each of these one at a time in a small, age-appropriate quantity is the safest approach, and it is the approach recommended by allergy specialists across Northern Europe.
Peanuts
Whole peanuts or pieces of nut should never be given to a baby or young child due to the serious choking risk they present. Instead, introduce peanut by mixing a small amount of smooth peanut butter or peanut flour into a fruit or vegetable puree your baby has already eaten without difficulty. Begin with just a quarter of a teaspoon blended into the puree and keep your baby close for at least two hours afterward so you can observe for any sign of a reaction. If nothing unusual occurs, you can gradually increase the quantity over the following days and aim to include peanut products in your baby's diet several times a week going forward.
Eggs
Well-cooked egg is one of the more straightforward allergens to introduce. A hard boiled egg, mashed smoothly or blended into a puree, is an easy starting point. You can also offer very soft, thoroughly scrambled egg once your baby is managing a slightly lumpier texture. Always ensure eggs are fully cooked for young infants, as there is an additional risk of bacterial contamination from raw or lightly cooked egg.
Fish
White fish such as cod, haddock, or sole, steamed gently and flaked into a smooth vegetable puree, makes a lovely introduction to fish. Beyond being an important allergen to establish early, fish is rich in protein, iodine, and omega-3 fatty acids that actively support your baby's brain development. Once your baby is handling a wider variety of textures, you can offer fish in slightly larger flakes alongside other soft foods.
As your baby moves into the wonderful, messy world of weaning, having the right kit on hand makes everything feel more manageable. The HelloLoomi Bib 3-Pack Mix in Daring Dino is a practical and cheerful choice for this stage, offering three sizes to grow with your baby right through the early weaning months and beyond, keeping little chests dry through every spoonful of pureed fish and mashed egg.
The Golden Rule: One New Food at a Time
Whenever you introduce an allergen, or any new food, always introduce it as a single ingredient and wait at least a full day before trying the next new item. This way, if a reaction does appear, you can identify the cause clearly and confidently. Ideally, offer new foods during the morning or at lunchtime rather than just before bed, so that you and your baby are both awake and alert during the observation period that follows.
For babies at higher risk due to severe eczema or an existing diagnosed allergy, it is worth speaking with your paediatrician or a registered dietitian before you begin. Some families in this situation choose to carry out the very first introduction of a high-risk allergen in a clinical setting where medical support is immediately on hand. For most babies without these specific risk factors, home introduction is considered safe and appropriate.
Recognising an Allergic Reaction in Your Baby
The majority of newly introduced foods cause no reaction at all. When a mild reaction does occur, it most often presents as a localised rash or redness around the mouth and chin, some slight fussiness, or a brief loose stool. These mild responses typically resolve on their own within a short time and do not necessarily mean your baby has developed a food allergy. However, it is important to know what a more serious reaction looks like, because some responses can escalate quickly.
Research into severe allergic reactions in infants found that hives appeared in around 94 percent of serious cases, and vomiting was present in approximately 83 percent. Anaphylaxis, the most severe form of allergic reaction, can begin within five to thirty minutes of exposure, which is why staying close and observant after introducing a new allergen matters so much.
Signs of a Serious Allergic Reaction
Call your emergency services immediately (112 across most of Europe) if your baby develops hives or widespread redness spreading across the body, noticeable swelling of the face, lips, tongue, or eyelids, vomiting combined with any other symptom involving a different part of the body, any change in breathing quality including wheezing or a strained cry, unusual limpness or loss of muscle tone, or a rapid or irregular heartbeat. The most important warning sign to understand is involvement of more than one body system at the same time. Even when no individual symptom appears severe, a reaction affecting the skin and the digestive system simultaneously, or the skin and the airways together, should always be treated as a medical emergency. If your baby has been assessed as being at high risk and has been prescribed an epinephrine auto injector, use it at the very first sign of suspected anaphylaxis without waiting for symptoms to become worse.
Keeping Mealtimes Calm and Consistent
One of the most important things parents can do after successfully introducing an allergen is to keep offering it regularly. Current guidance from allergy specialists suggests that including an allergenic food at least two to three times per week, once it has been introduced without a reaction, helps to maintain tolerance over time. Stopping the food after a successful introduction and reintroducing it weeks or months later can unfortunately increase the risk of a sensitivity developing in the gap.
Making mealtimes a calm and positive experience also helps your baby build a confident and curious relationship with food from the very beginning. As self-feeding begins to develop and your baby starts exploring textures and flavours more independently, soft and absorbent clothing protection makes a real difference. The HelloLoomi Scarf Bib in Khaki is a beautifully simple option for this stage. Its soft, breathable cotton keeps little chests dry throughout even the most enthusiastic feeding session, while its relaxed style is comfortable enough for all-day wear.
A Note on Breastfeeding and Allergen Exposure
If you are currently breastfeeding, you do not need to avoid allergenic foods in your own diet as a preventive measure, unless your baby has already been diagnosed with a specific food allergy. Some research suggests that trace amounts of food proteins that pass into breast milk may play a small but helpful role in gently priming your baby's immune system toward tolerance. Current European guidance is clear on this point: there is no benefit to a maternal elimination diet during breastfeeding as a strategy for allergy prevention in otherwise healthy infants. Continue eating a varied and nourishing diet for your own wellbeing and your baby's.
You Have More Power Than You Think
The science of food allergy prevention has shifted fundamentally in recent years, and the message for parents today is genuinely hopeful. By introducing common allergens early, offering them consistently, and staying informed about the signs of a reaction, you are actively doing something meaningful to reduce your baby's chances of developing a food allergy. You do not need to wait. You do not need to be frightened. Take it one food at a time, trust the process, and celebrate every small mealtime milestone along the way.
At HelloLoomi, we believe that the early months of parenthood should feel supported and beautiful. From practical mealtime accessories designed to grow with your baby, to the softest babywear made for Northern European families, everything we create is made with your baby's comfort and your confidence in mind. Explore our full collection and find the pieces that will make your weaning journey a little more joyful.
Frequently Asked Questions
When should I start introducing allergenic foods to my baby?
Most European and international health guidelines recommend introducing allergenic foods, alongside other solid foods, at around six months of age. The introduction should not begin before four months, as a younger baby's digestive and immune systems are not yet ready. For babies considered at high risk due to severe eczema or an existing food allergy, a paediatrician may recommend a tailored introduction plan.
Can I introduce peanuts to my baby at home or does it need to be done in a clinic?
For most babies without a history of severe eczema or a previous allergic reaction, introducing peanuts at home is considered safe according to current allergy guidelines. Mix a small amount of smooth peanut butter or peanut flour into a familiar fruit puree and observe your baby for at least two hours. Families of babies who are at high risk may be advised to carry out the first introduction in a clinical setting, so speak with your doctor if you are unsure which category your baby falls into.
What are the signs that my baby is having an allergic reaction to a new food?
Mild reactions can include redness or a rash around the mouth, mild vomiting, or loose stools. A severe reaction known as anaphylaxis typically involves hives spreading across the body, swelling of the face or lips, vomiting combined with another symptom affecting a different body system, difficulty breathing, a hoarse or strained cry, or unusual limpness. If your baby shows symptoms involving more than one part of the body at the same time, call emergency services on 112 immediately.
Does early introduction of allergens really reduce the risk of food allergy?
Yes, the evidence is strong and consistent. The LEAP study found that infants at high risk who consumed peanut products regularly from early infancy were more than 81 percent less likely to develop a peanut allergy compared to those who avoided peanuts. The follow-up LEAP Trio study, published in 2024, confirmed these protective effects persisted into later childhood. Major organisations including ESPGHAN and the EAACI now actively recommend early allergen introduction as a prevention strategy for all infants.
How often should I give my baby allergenic foods after the first introduction?
Once an allergen has been successfully introduced without a reaction, current guidance from allergy specialists recommends offering it at least two to three times per week. Regular exposure helps maintain immune tolerance over time, and stopping the food for extended periods after a successful introduction can increase the risk of a sensitivity developing during the gap.
Should I avoid eating allergenic foods while breastfeeding to protect my baby?
No, unless your baby has already been diagnosed with a specific food allergy. Current European guidelines make clear that there is no benefit to avoiding allergenic foods during breastfeeding as an allergy prevention strategy for healthy infants. Eating a varied and nutritious diet is better for both you and your baby, and there is some evidence that gentle exposure to food proteins through breast milk may support the development of tolerance.
What is a good bib for a baby starting solid foods and weaning?
A soft, absorbent bib that is easy to fasten and simple to clean is ideal for the early weaning phase. The HelloLoomi Bib 3-Pack Mix offers three sizes designed to grow with your baby through the messiest stages of introducing solids, while the HelloLoomi Scarf Bib is a stylish and practical option for older babies who are beginning to self-feed and need comfortable, all-day protection from drips and spills.
