Most Common Food Allergies: Top 10

The most common food allergies are shellfish, peanut, milk, tree nuts and egg, with US surveys finding about 1 in 10 adults and 1 in 13 children affected. Behind those headline foods sit fin fish, wheat, soy and sesame, plus a newer tick-linked red meat allergy that public health agencies now track closely. Most of them are named for mandatory labelling in the United States, the European Union and the UK.

This Finepedia guide ranks ten food allergies by how many people they affect, using the largest population surveys and official estimates available as of October 2026. Each entry covers the trigger, who is affected, symptoms, label names and hidden sources, the chance of outgrowing it, and current management, followed by sections on allergy versus intolerance and when a reaction becomes an emergency.

For meal planning, see Finepedia's guides to the most nutritious seeds for your diet, healthy foods for senior citizens and the most unhealthy foods to limit, where processed products often hide allergens.

Important Health Note

This article is general information, not medical advice. Food allergy can only be diagnosed properly by a qualified clinician such as an allergist or immunologist, usually with a detailed history, skin-prick or blood tests and sometimes a supervised oral food challenge. Do not remove whole food groups from a child's diet, or try home desensitisation, without professional guidance; the same caution applies to restrictive plans, as Finepedia's look at the risks of the keto diet explains.

A severe allergic reaction (anaphylaxis) is a medical emergency. If someone has trouble breathing, throat tightness, swelling of the tongue or lips, collapse or confusion after eating, use their adrenaline (epinephrine) auto-injector or nasal spray straight away if one is prescribed, and call emergency services (911 in the US, 999 in the UK, 112 in the EU and India).

How We Ranked the Most Common Food Allergies

Many people mistake an intolerance for an allergy, and some genuine allergies are never diagnosed. Finepedia therefore relied on studies that filtered self-reports against the symptom patterns typical of a true immune (IgE-mediated) reaction, and on official agency estimates.

• Main yardstick: the estimated number of US children and adults living with each allergy, as published by Food Allergy Research and Education (FARE) from two nationally representative surveys led by Ruchi Gupta and colleagues (children in Pediatrics, 2018; adults in JAMA Network Open, 2019).
• Cross-check: the allergen-specific percentages in those two peer-reviewed papers, read separately for adults and children.
• Tie-break: where FARE's population counts are equal, the allergen with the larger combined adult plus child percentage ranks higher.
• Red meat allergy (alpha-gal syndrome) is not in those surveys, so its place relies on a US Centers for Disease Control and Prevention (CDC) estimate of people possibly affected since 2010, a different kind of figure.
• Rankings differ by region; buckwheat, for example, matters far more in Japan than in the US.

Survey estimates describe convincing allergy, not proof by food challenge, and perception runs well ahead of reality. In the adult survey, 19.0% of adults said they had a food allergy, but only 10.8% reported reactions consistent with one. In the child survey, caregivers reported allergy in 11.4% of children, against a filtered estimate of 7.6%.

Key Population Figures Used

Most Common Food Allergies at a Glance

1. Shellfish Allergy

What Triggers It

Shellfish allergy is the most common food allergy among US adults. Most reactions come from crustaceans such as shrimp (prawns), crab and lobster. Molluscs, which include clams, mussels, oysters, scallops, squid and octopus, cause reactions less often, and many people who react to shrimp can eat molluscs, though that should only be tested with an allergist.

The key culprit is tropomyosin, a structural protein that survives cooking. Very similar tropomyosins exist in house dust mites and cockroaches, which is one reason some people with mite allergy test positive to shellfish. In the adult survey, shrimp was the commonest single trigger at 1.9%, followed by molluscs at 1.6%.

Symptoms and Risks

• Hives, itching and swelling of the lips or face, often within minutes.
• Vomiting, stomach cramps or diarrhoea.
• Wheezing, coughing or throat tightness.
• Severe reactions, including anaphylaxis; about 57% of shellfish-allergic adults in the 2019 survey reported at least one severe reaction.

Hidden Sources and Label Names

Shellfish is rarely concealed, but it does appear in fish stock, seafood flavourings such as crab extract, bouillabaisse, paella, some sushi and surimi. Look for names such as prawn, langoustine, crayfish, krill and scampi. In the US the law covers only crustaceans, so a mollusc ingredient like oyster sauce may not appear in a "Contains" statement, even though it must still be named in the ingredient list.

Management and Outlook

Avoidance is the core of treatment, with extra care at seafood restaurants and fish counters, where cross-contact is common and cooking vapour can occasionally trigger symptoms. People at risk of anaphylaxis are usually prescribed epinephrine and a written action plan. Because adult-onset shellfish allergy rarely fades, most people should plan for a lifelong condition.

Interesting Facts

• Shellfish tops the adult list in the US, but it is only third among children, behind peanut and milk.
• Roughly 48% of shellfish-allergic adults in the 2019 survey reported that the allergy started in adulthood.
• The EU and UK treat crustaceans and molluscs as two separate regulated allergens, unlike US law.

2. Peanut Allergy

What Triggers It

Peanuts are legumes that grow underground, botanically closer to peas and lentils than to walnuts. Even so, between 25% and 40% of people with peanut allergy also react to at least one tree nut, according to studies summarised by the American College of Allergy, Asthma and Immunology (ACAAI). The reaction is driven by several robust storage proteins; component testing for Ara h 2 helps allergists separate genuine allergy from harmless sensitisation.

Peanut is the most common food allergy among US children, and in the adult survey it was far more frequent among people under 40 than among those over 60.

Symptoms and Risks

• Skin reactions: hives, flushing, swelling.
• Mouth and throat itching or tightness.
• Vomiting and abdominal pain.
• Breathing difficulty and a drop in blood pressure in severe cases.

Peanut is one of the leading causes of food-induced anaphylaxis. About two-thirds of peanut-allergic adults in the 2019 survey reported at least one severe reaction, the highest share of any allergen studied, and more than half held a current epinephrine prescription.

Hidden Sources and Label Names

Peanut appears as groundnut, monkey nut, arachis oil (in the UK) and in satay sauce, some curries, chilli sauces, African and Asian stews, nougat, energy bars and baked goods. Most people with peanut allergy can tolerate highly refined peanut oil, but cold-pressed, expeller-pressed or gourmet peanut oils should be avoided. Precautionary phrases such as "may contain" are voluntary in the US and not a reliable guide to safety.

Management and Outlook

Peanut is also the allergy where prevention science has moved fastest. The LEAP trial, published in 2015, randomly assigned high-risk infants to eat or avoid peanut. Among infants who started with a negative skin test, peanut allergy at age five affected 13.7% of the avoidance group but only 1.9% of the eating group. In 2017 the US National Institute of Allergy and Infectious Diseases (NIAID) issued guidelines encouraging early introduction of infant-safe peanut foods, from around 4 to 6 months for high-risk babies under medical guidance.

For people who already have the allergy, the US Food and Drug Administration (FDA) approved the oral immunotherapy Palforzia in January 2020 for children aged 4 to 17, and extended it to ages 1 to 3 in July 2024. Users must still avoid peanut. A skin-patch approach (epicutaneous immunotherapy) remains under study as of October 2026.

Interesting Facts

• A LEAP follow-up found that children who ate peanut through age five kept their protection even after a year of avoiding it.
• Peanut allergy is a legume allergy, yet it is managed alongside tree nuts because the two so often occur together.
• FARE reports that self-reported peanut or tree nut allergy in US children more than tripled between 1997 and 2008.

3. Milk Allergy

What Triggers It

Cow's milk allergy is an immune reaction to milk proteins. Casein forms most of the protein in milk and stays stable when heated, while whey proteins such as beta-lactoglobulin are more easily changed by cooking. That difference partly explains why some children can eat milk baked into a cake well before they can drink a glass of milk.

Milk from goats and sheep is usually not a safe substitute because its proteins are very similar. The FDA's 2025 allergen guidance now treats milk from other ruminant animals as a major allergen too.

Symptoms and Risks

• Hives and swelling shortly after drinking or eating dairy.
• Vomiting, stomach upset and, especially in infants, blood in the stool.
• Eczema flares in some young children.
• Anaphylaxis, which is less frequent than with peanut but possible.

Some infants have a delayed, non-IgE form of milk allergy that mainly affects the gut and may not show up on standard tests.

Hidden Sources and Label Names

Watch for butter, cheese, cream, ghee, yogurt, curds, casein, caseinates, whey, lactalbumin, lactoglobulin and milk solids. Milk turns up in bread, margarine, processed meats, chocolate, crisps with cheese flavours, some "non-dairy" creamers and many restaurant sauces. Lactose-free milk still contains milk protein and is not safe for someone with a milk allergy.

Management and Outlook

Families are generally advised to remove milk and dairy, read every label and carry emergency medicine when prescribed. Infants who need a substitute often receive an extensively hydrolysed or amino-acid formula chosen by a doctor or dietitian. Under specialist supervision, a "milk ladder" that moves from well-baked milk towards fresh milk can help some children build tolerance, but it should never be started at home without professional advice.

Interesting Facts

• Milk allergy is the only one of the top three that is equally common in US adults and children, at 1.9% each.
• In one study cited by ACAAI, fewer than 20% of children had outgrown milk allergy by age four.
• Milk allergy and lactose intolerance can cause similar stomach symptoms but have completely different causes.

4. Tree Nut Allergy

What Triggers It

Tree nut allergy is really a family of allergies. A person may react to one nut, several, or all of them, and the risks are not identical. Some pairs are botanically close and cross-react strongly, which is why a cashew allergy often comes with a pistachio allergy. In the adult survey, almond, walnut and hazelnut each affected around 0.6–0.7% of adults, and nine in ten tree nut-allergic adults reported more than one food allergy.

Symptoms and Risks

• Itching in the mouth, throat or eyes.
• Hives, swelling and nasal congestion.
• Nausea, cramps, vomiting and diarrhoea.
• Difficulty swallowing or breathing; anaphylaxis.

Alongside peanut and shellfish, tree nuts are among the allergens most often linked to anaphylaxis, and about six in ten tree nut-allergic adults in the 2019 survey reported a severe reaction.

Hidden Sources and Label Names

Nuts are common in pesto, praline, gianduja, marzipan, nougat, frangipane, baklava, nut butters, nut milks, granola and some Asian and Middle Eastern dishes. Nut oils and some liqueurs or flavoured spirits can also contain nut proteins. In January 2025 the FDA narrowed its official tree nut list to 12, removing coconut, chestnut, shea nut and several others from allergen "Contains" statements; those foods must still be named in the ingredient list, and anyone allergic to them should keep checking.

Management and Outlook

Allergists often advise avoiding all tree nuts, at least until component testing or supervised challenges show which nuts are safe, because cross-contact in factories and kitchens is common. Oral immunotherapy for tree nuts is offered in some specialist clinics and trials, and the biologic omalizumab can raise reaction thresholds across several foods (see the FAQ).

Interesting Facts

• Coconut was treated as a tree nut on US labels for years until the FDA's January 2025 guidance changed that.
• Pine nuts are seeds, yet they are on the FDA's tree nut list.
• Outgrowing estimates vary: ACAAI says fewer than 10%, while Anaphylaxis UK cites about 9–14% of children.

5. Egg Allergy

What Triggers It

Egg allergy is one of the classic allergies of early childhood. Egg white causes most reactions, though yolk proteins can also be involved, and it is impossible to separate the two completely in the kitchen. Ovomucoid survives baking, so children whose immune system targets it are more likely to react even to cakes and to keep the allergy longer.

People allergic to hen's eggs may also react to duck, goose, turkey or quail eggs, which is why the FDA now treats eggs from other birds as a major allergen as well.

Symptoms and Risks

• Rash, hives or eczema flares around the mouth.
• Runny nose, sneezing and red, watery eyes.
• Stomach pain, nausea and vomiting.
• Wheezing and, less commonly, anaphylaxis.

Hidden Sources and Label Names

Egg can appear as albumin, ovalbumin, globulin, lysozyme, lecithin from egg, meringue, mayonnaise, surimi and egg glaze on pastries. It also hides in canned soups, salad dressings, ice cream, pasta, battered foods, meatballs and meatloaf. Even some commercial egg substitutes contain egg protein, so the word "substitute" alone is not a safety guarantee.

Management and Outlook

Avoidance plus a clear plan for accidental exposure is the standard approach. Many children can tolerate egg baked thoroughly into goods before they tolerate scrambled or raw egg, and allergists may use a supervised "egg ladder" to build tolerance step by step.

Interesting Facts

• Some studies suggest about half of children with egg allergy outgrow it within a year of diagnosis, while others take many years.
• Egg allergy and severe eczema in infancy were the high-risk features used to select babies for the LEAP peanut trial.
• Skin-prick tests can show whether a child reacts to egg white or egg yolk proteins; white is the more common culprit.

6. Fin Fish Allergy

What Triggers It

Fin fish allergy is a reaction to proteins in fish such as cod, salmon and tuna. Parvalbumin, the main allergen, is similar across many species, which is why reacting to one fish often means reacting to others. Some people react to fish gelatin from skin and bones rather than to the flesh itself.

Fish allergy is unusual because it so often starts in adulthood. ACAAI cites a study in which up to 40% of people with fish allergy first reacted as adults, and the 2019 US survey found a similar share.

Symptoms and Risks

• Hives or skin rash.
• Nausea, cramps, vomiting or diarrhoea.
• Sneezing, runny nose or asthma symptoms.
• Anaphylaxis, which is a frequent outcome of fish allergy despite its lower overall prevalence.

Hidden Sources and Label Names

Fish appears in Worcestershire sauce, Caesar dressing, fish sauce, anchovy paste, some pizzas and tapenades, surimi (imitation crab), many Asian stocks and some omega-3 supplements. People with fish allergy should ask an allergist before taking fish oil.

Management and Outlook

Doctors commonly advise avoiding all fin fish, although supervised testing sometimes shows that certain species are tolerated. Steam and vapour from frying fish can also trigger symptoms in sensitive people, so staying out of the kitchen while fish is cooked is sensible. Fish and shellfish allergies are biologically unrelated, but a person can have both.

Interesting Facts

• Having a fish allergy does not automatically mean being allergic to shrimp or crab.
• Under US law, a label cannot just say "fish": it must name the species, such as cod or tilapia.
• Fish-allergic adults in the 2019 survey had one of the highest rates of lifetime emergency visits for food allergy, at about 60%.

7. Wheat Allergy

What Triggers It

Wheat allergy is an IgE-mediated reaction to one or more wheat proteins, from gluten-related gliadins to non-gluten proteins in the grain. It is not the same as coeliac disease, which is an autoimmune condition driven by gluten, and it is not the same as non-coeliac gluten sensitivity.

Adults show two notable patterns. In wheat-dependent exercise-induced anaphylaxis, a reaction occurs only when wheat is eaten shortly before exercise, often linked to omega-5 gliadin. In baker's asthma, a workplace condition, breathing in flour dust causes asthma even though eating bread is fine.

Symptoms and Risks

• Hives, swelling and itchy skin.
• Nausea, cramps, vomiting and diarrhoea.
• Stuffy nose, sneezing or asthma.
• Anaphylaxis, sometimes only when combined with cofactors such as exercise, alcohol or anti-inflammatory painkillers.

Hidden Sources and Label Names

Wheat goes by many names: durum, semolina, spelt, farro, einkorn, emmer, kamut, bulgur, couscous, farina, seitan and triticale. It is found in soy sauce brewed with wheat, beer, breaded meats, sauces thickened with flour, soups, sausages and some ice creams. Note that "gluten-free" is a coeliac label, not a guarantee for wheat allergy, so ask an allergist which products are safe.

Management and Outlook

The outlook for children is good: about two-thirds outgrow wheat allergy, many before adolescence. Many wheat-allergic people can eat other grains, but not everyone can, so this should be confirmed with an allergist. Adults with exercise-linked reactions are usually advised to avoid wheat for several hours before physical activity.

Interesting Facts

• More than half of wheat-allergic adults in the 2019 survey said their allergy began in adulthood.
• Anaphylaxis UK cites research showing about 30% of children outgrow wheat allergy by age four.
• US law names wheat on its own, while EU and UK law regulates all cereals containing gluten.

8. Soy Allergy

What Triggers It

Soybeans are legumes used in a huge range of processed foods. Soy allergy typically appears in babies and toddlers, sometimes alongside milk allergy. Severe reactions are rarer than with peanut, but anaphylaxis is still possible.

Symptoms and Risks

• Hives, itching and swelling of the lips or tongue.
• Vomiting, cramps, indigestion and diarrhoea.
• Wheezing, repetitive cough or hoarse voice.
• Rarely, anaphylaxis with low blood pressure.

Hidden Sources and Label Names

Look for soya, soybean, edamame, miso, natto, tempeh, tofu, textured vegetable protein, soy protein isolate and shoyu or tamari. Soy turns up in some infant formulas, canned broths and tuna, processed meats, hot dogs, energy bars, baked goods, chicken nuggets and vegetarian meat alternatives. Many people with soy allergy can tolerate highly refined soybean oil and soy lecithin, but they should ask an allergist first, and oil that has fried soy-containing food can carry soy protein to the next batch.

Management and Outlook

Avoidance, label reading and an emergency plan are the mainstays. Because soy allergy often resolves during childhood, allergists typically retest children periodically and may offer a supervised oral food challenge to confirm tolerance before soy is reintroduced.

Interesting Facts

• The NHS lists soybeans together with peanuts, peas and chickpeas because all are legumes.
• Soy-based formulas are not a reliable alternative for every milk-allergic baby, since some react to both.
• ACAAI notes soy can turn up in unexpected products such as low-fat peanut butter and even some vodkas.

9. Sesame Allergy

What Triggers It

Sesame allergy is a reaction to proteins in sesame seeds, sesame flour, tahini and sometimes unrefined sesame oil. It is less common than the allergens above, but it tends to be severe and persistent.

The US made sesame its ninth major food allergen through the Food Allergy Safety, Treatment, Education, and Research (FASTER) Act, passed in 2021, with labelling required from 1 January 2023.

Symptoms and Risks

• Hives, itching and swelling.
• Vomiting and abdominal pain.
• Coughing, wheezing or throat tightness.
• Anaphylaxis, which is a real concern with this allergy.

Sesame-allergic adults in the 2019 survey had the highest rates of any group for current epinephrine prescriptions (about 62%) and for emergency visits in the past year (about 32%).

Hidden Sources and Label Names

Sesame can appear as benne, gingelly, sesamol, tahini, til, halva, gomasio and za'atar. It is common in hummus, falafel, bagels, burger buns, crackers, breadsticks, sushi, stir-fry sauces, dressings and spice blends. FDA guidance expects sesame used in a "natural flavour" or "spice" to be declared by name.

Management and Outlook

Strict avoidance, label checks and carrying prescribed epinephrine are standard. The FDA has noted that after the new rule took effect, some manufacturers added small amounts of sesame to products and labelled it rather than proving their lines were sesame-free, so people with this allergy need to check familiar products again.

Interesting Facts

• Products already on store shelves before 2023 did not have to be relabelled, so older stock could lack the new sesame warning.
• Sesame is a seed, not a nut; being allergic to it does not automatically mean reacting to sunflower or pumpkin seeds.
• Sesame became the first new US major allergen in nearly two decades.

10. Red Meat Allergy (Alpha-gal Syndrome)

What Triggers It

Alpha-gal syndrome is an allergy to a sugar found in most mammals, including cows, pigs, sheep and deer, but not in people. In the United States it is mainly linked to bites from the lone star tick. After sensitisation, eating mammalian meat, and for some people dairy, gelatin or certain medical products, can trigger a reaction.

It ranks tenth because the CDC counted more than 110,000 suspected cases from 2010 to 2022 and estimated that up to 450,000 people might have been affected. That cumulative estimate is not directly comparable with survey prevalence, and the true number is unknown because cases are not nationally notifiable.

Symptoms and Risks

• Symptoms usually begin 2 to 6 hours after eating, much later than most food allergies.
• Hives, itching and swelling of the lips, throat or eyelids.
• Nausea, vomiting, diarrhoea, heartburn or severe stomach pain.
• Dizziness, low blood pressure and anaphylaxis.

Hidden Sources and Label Names

Beyond beef, pork, lamb, venison and rabbit, watch for gelatin in sweets and capsules, lard, tallow, some broths and stock cubes, and, for some people, milk products. Certain medicines, vaccines and other products of mammalian origin can also contain alpha-gal, so people with the diagnosis should tell every clinician who treats them.

Management and Outlook

Diagnosis combines a clinical history with a blood test for alpha-gal IgE antibodies; a positive test alone is not enough. Management means avoiding the foods and products that trigger symptoms and preventing further tick bites. CDC surveys have found that many healthcare providers are unfamiliar with the condition, so patients may need to ask about it directly.

Interesting Facts

• Alpha-gal is one of the very few food allergies caused by a carbohydrate rather than a protein.
• A 2023 CDC report found only about 22% of US healthcare providers felt confident diagnosing or managing alpha-gal syndrome.
• Poultry and fish do not contain alpha-gal and are usually safe for people with the condition.

Food Allergy vs Food Intolerance

A food allergy is an immune system response to a food. A food intolerance is a problem digesting or processing a food, and it does not involve the immune system in the same way.

Two conditions are often confused with allergy:

• Lactose intolerance is a shortage of the enzyme lactase, which breaks down milk sugar. It causes gas and bloating, not hives or anaphylaxis, and lactose-free milk usually solves it. A milk allergy is a reaction to milk protein instead.
• Coeliac disease is an autoimmune disorder in which gluten damages the small intestine. It is serious and lifelong, but it is not an allergy, and it needs a different diagnosis pathway, usually through a gastroenterologist.

Honourable Mentions

Several other foods cause allergies that are important in particular regions or are regulated in some countries but did not make the US-based Top 10.

The EU and UK list 14 allergens that food businesses must declare: celery, cereals containing gluten, crustaceans, eggs, fish, lupin, milk, molluscs, mustard, tree nuts, peanuts, sesame, soybeans, and sulphur dioxide or sulphites above 10 mg per kg or litre. Sulphites are included because they can provoke asthma-like reactions in sensitive people, even though those reactions are not usually true allergies.

When to Seek Emergency Help

Most allergic reactions to food are mild, but any reaction can become serious quickly, and it is possible to have anaphylaxis without any rash or hives. Call emergency services immediately (911 in the US, 999 in the UK, 112 in the EU and India) if someone develops any of the following after eating:

• Sudden swelling of the lips, mouth, tongue or throat.
• Fast or difficult breathing, wheezing, choking or gasping.
• A tight throat or trouble swallowing.
• Skin, lips or tongue turning blue, grey or pale.
• Sudden confusion, drowsiness, dizziness or fainting.
• A floppy, limp or unresponsive child.

If an adrenaline (epinephrine) auto-injector or nasal spray has been prescribed, use it straight away and then call for an ambulance, even if the person seems to improve. Lie the person down with legs raised unless breathing is easier sitting up. In August 2024 the FDA approved the first needle-free epinephrine nasal spray (neffy) for people weighing at least 30 kg. Symptoms can return several hours after the first wave, which is why specialists often recommend a period of medical observation after anaphylaxis. Teenagers and young adults, and people who also have asthma, face a higher risk of severe reactions. People with diagnosed allergies are usually advised to carry two doses of their emergency medicine at all times.

Frequently Asked Questions

What are the most common food allergies?

In the United States, the most common food allergies are shellfish, peanut, cow's milk, tree nuts, egg, fin fish, wheat, soy and sesame. Shellfish leads among adults, while peanut and milk lead among children. Together, these nine foods are the major allergens named in US labelling law, and most of them are also regulated in the EU and UK.

How many people have a food allergy?

FARE estimates that about 33 million people in the United States have at least one food allergy. Large surveys published in 2018 and 2019 put convincing food allergy at 10.8% of adults and 7.6% of children. Many more people believe they have an allergy, so testing by a specialist is important before cutting foods out.

Can adults develop food allergies suddenly?

Yes. Almost half of food-allergic adults in the 2019 US survey reported developing at least one allergy in adulthood. Shellfish and fin fish are especially likely to appear later in life, and wheat allergy in adults can take unusual forms, such as reactions that happen only when wheat is eaten shortly before exercise.

Which food allergies do children usually outgrow?

Allergies to milk, egg, wheat and soy are often outgrown during childhood, though many children now keep them past age five. Allergies to peanut, tree nuts, fish, shellfish and sesame are more likely to last. Only an allergist can confirm that an allergy has resolved, usually with tests and a supervised oral food challenge.

Is there a cure for food allergy?

There is no cure as of October 2026, but treatments have improved. The FDA approved Palforzia for peanut allergy in 2020 and widened it to toddlers in 2024. In February 2024 it approved the injectable biologic omalizumab (Xolair) to reduce reactions after accidental exposure to one or more foods. People on either treatment must still avoid their allergens and carry epinephrine.

Does introducing peanut early prevent peanut allergy?

For many infants, yes. The LEAP trial found that regularly eating peanut from infancy sharply lowered the chance of peanut allergy by age five in high-risk babies. US guidelines since 2017 support introducing infant-safe peanut foods early, around 4 to 6 months for high-risk babies, ideally after discussing the plan with a doctor.

Is lactose intolerance a milk allergy?

No. Lactose intolerance happens when the body does not make enough lactase to digest milk sugar, causing bloating, gas and diarrhoea. A milk allergy is an immune reaction to milk proteins and can cause hives, vomiting or anaphylaxis. Lactose-free milk helps people with lactose intolerance but is not safe for someone with a milk allergy.

Conclusion

The most common food allergies, led by shellfish, peanut, milk, tree nuts and egg, affect tens of millions of people, and the pattern shifts with age. Children most often react to peanut and milk and frequently outgrow milk, egg, wheat and soy, while adults tend to develop lasting shellfish and fish allergies. Sesame's new US status and tick-linked alpha-gal syndrome show the list is still evolving.

The practical lessons stay the same: get a proper diagnosis, learn the label names of your allergen, carry prescribed emergency medicine, and treat breathing trouble or swelling after eating as an emergency. With early introduction, oral immunotherapy and biologic treatments, people with food allergies have more options in October 2026 than ever before.