What is a Lupin Allergy?

Lupin allergy is on the rise, but its prevalence varies widely across regions. Learn how to prevent it.

peanut and lupin allergy

Lupins are a legume related to peanuts, cashews, and chickpeas. Lupin flour is used to make gluten-free foods and can be found in various traditional food products. Lupin allergy is similar to peanuts and tree nuts in many ways.

A lupin allergy is similar to a peanut allergy in many ways.

Lupin and peanut allergies are both caused by proteins in the plant. These proteins can be found in pre-packaged foods, such as cereals and pieces of bread, but they're also not required to be labelled on food labels. It means that people with a lupin or peanut allergy must avoid all foods containing them—which is why it's important to know what they look like!

Suppose you suspect having an allergy to legumes (like peanuts). In that case, you might have an allergy to another legume (like lupins). And suppose you have an allergy to one tree nut (such as walnuts). Your body will likely react negatively when exposed to other tree nuts, such as almonds or cashews.

Symptoms of a lupin allergy can be very severe and can include anaphylaxis, which can be life-threatening.

Symptoms include hives, itching, swelling of the lips and throat, and difficulty breathing. Anaphylaxis is a severe form of an allergic response, and it has the potential to be fatal. Symptoms include throat or tongue swelling, difficulty breathing, dizziness, or fainting.

People with a food allergy to peanuts or tree nuts should be aware that lupins are related to the peanut and are in the same plant family.

What is an anaphylactic reaction?

An anaphylactic reaction is a severe allergic reaction that can kill you if you eat something you are allergic to.

Anaphylaxis occurs when the body's immune system overreacts to a substance it perceives as threatening, usually because the person has been exposed to it before. Anaphylaxis is usually triggered by foods, medications, and insect stings, but it can also be triggered by latex and particular exercise. If left untreated, anaphylaxis can lead to death within minutes. The most common symptoms of anaphylaxis include:

  • Itching, swelling and hives on the skin

  • Tightening of the throat and difficulty breathing

  • Dizziness or feeling faint

  • Nausea and vomiting

Anaphylactic reactions are categorized into mild, moderate, severe and life-threatening. Symptoms of a mild reaction include hives or itching around the mouth; those of a moderate reaction include difficulty breathing and swallowing; those of a severe reaction include swelling of the throat or tongue; those of a life-threatening reaction include loss of consciousness and shock.

Take this test if you suspect an allergic reaction.

Food labels in Europe now have to list lupin flour as an ingredient if it contains more than 1 per cent lupin protein or seed oil produced from lupin seeds (according to EU regulations). Lupin flour is naturally high in fibre but has less fat; it may also contain less gluten than wheat flour.

 People with food allergies to peanuts or tree nuts should know that lupins are related to these foods and may be cross-reactive.

Lupin plants come from a plant family called Fabaceae, which includes peas, beans, and lentils; peanuts are also part of this family.

What are lupins?

Lupins are legumes from the same plant family as peanuts, cashews, and chickpeas (garbanzo beans). People with allergies to peanuts or tree nuts may also be allergic to lupins. It's important to note that people with a peanut allergy should not eat lupin or foods made with lupin flour or seeds because they can cause severe reactions.

You can find lupin flour in traditional food products as well as gluten-free food products

Lupin flour is a common ingredient in many packaged foods. It can be found in bread, cakes, and pastries, among other products. The lupin allergy is often not listed on food labels, so it's essential to read the ingredients list carefully. The Food Allergy Labeling and Consumer Protection Act (FALCPA) requires that food manufacturers note if their product contains any of the eight major allergens: milk, egg, wheat/gluten, tree nuts such as almonds or walnuts, fish such as bass or flounder/sole; peanuts and soybeans.

However, this does not mean that all other ingredients are safe for you to consume if you have an allergy to another ingredient listed on the label. Lupin flour may not be considered one of FALCPA's eight significant allergens. However, it could still cause severe reactions in people with allergies.

Allergen labelling laws require all packaged foods to list significant food allergens

Foods can cause allergic reactions in people who are sensitive to them. Food allergens are proteins that cause the immune system to respond when eaten. The reaction can range from mild digestive problems to life-threatening anaphylaxis (severe swelling).

Foods that contain these allergens must be labelled as such by law, but foods containing lupin don't have to disclose it on their labels. Lupin is a legume that looks similar to peanuts and can be used as a substitute for peanuts in foods like peanut butter or nut spreads.

The primary food allergens in this country are:

  • Milk

  • Eggs

  • Fish (such as bass, flounder and cod)

  • Crustacean shellfish (such as crab)

  • Tree nuts (including almonds, cashews, pecans and walnuts)

  • Peanuts

recent study by researchers identified lupin as a hidden food allergen in pre-packed foods, especially gluten-free products. Lupin flour is found in many traditional food products such as bread, pasta, and cakes and can be utilized to replace wheat flour (which contains gluten).

Lupin flour is not required to be labelled on food labels. However, you must be aware of your food if an allergy occurs.

People with food allergies should be aware of their potential exposure to lupin

Lupin flour is not a significant allergen, but it does cause reactions in people with lupin allergies. Lupin flour is also not required to be included on food labels. It means that when you are eating gluten-free foods, there is no guarantee that they do not contain lupin flour. People should be aware of their potential exposure to lupin and avoid products containing this ingredient if they have a known allergy to it or any other legume family members such as soybeans, peanuts and peas (to name a few).

Use this method to measure the IgE antibody levels in your blood.

Key takeaways

Lupin beans are a new hidden food allergen that can cause severe allergic reactions.

Lupin beans are related to peanuts and other legumes, like soybeans, peas, and lentils. This family of beans is commonly used in baking because it provides protein for baked goods. It also has a high fibre content and can be used in gluten-free products.

An immune system response causes lupin allergies when

  1. Someone allergic to lupin eats or breathes in the pollen from this plant. Lupin pollen can travel far distances and cause allergies even if you live far away from where the plant grows. 

  2. If you are allergic to lupin, you may experience symptoms such as nasal congestion, hives, eczema (skin rash), nausea, vomiting, diarrhoea and abdominal pain. These symptoms may occur minutes after eating lupin or breathing in its pollen.

lupin food allergy

Lupin allergy symptoms usually disappear after several hours. Still, some people may have more severe reactions requiring immediate medical attention. Lupin is a legume that belongs to the same family as peanuts, soybeans, and beans. It is an essential crop for livestock feed, especially in Australia and Europe. Lupin is used to manufacture foods such as cereals, bread, pasta, soups and snacks. In addition, it contains protein-rich oil that can be extracted from its seeds. The most common symptoms of lupin allergy include the following:

  • Sneezing

  • Runny nose

  • Hives or rashes on the skin

  • Itchy eyes, throat or ears

In other situations, serious reactions may happen. These can include:

  • Wheezing and difficulty breathing

  • Abdominal pain, nausea and vomiting

How do you recognize if you have a lupin allergy?

You must see a doctor for a proper diagnosis if you suspect there is a lupin allergy. An allergy to lupin, also known as lupine, is a food allergy that occurs when the body's immune system reacts to proteins in lupin, a type of legume.

Symptoms of a lupin allergy can vary but may include the following:

  • Itching, swelling, or redness of the skin, especially around the mouth or on the face

  • Hives or rashes on the skin

  • Swelling of the lips, tongue, or throat

  • Difficulty breathing

  • Nausea, vomiting, or diarrhoea

  • Abdominal pain

In severe cases, a lupin allergy can cause a life-threatening reaction known as anaphylaxis. Symptoms of anaphylaxis may include:

  • Rapid swelling of the face, lips, or throat

  • Difficulty breathing or swallowing

  • Rapid or weak pulse

  • Dizziness or fainting

  • Confusion or loss of consciousness

If you experience these symptoms after consuming lupin or products containing lupin, seek medical attention immediately. It's important to note that a lupin allergy can be challenging to diagnose because lupin is not commonly used in food products, so it may not be immediately apparent that it is the cause of your symptoms.

To diagnose a lupin allergy, your doctor will likely ask about your symptoms and medical history and may also perform a physical exam. They may also order allergy tests or a blood test to determine if you are allergic to lupin.

Tips for those with a Lupin Allergy

If you are diagnosed with a lupin allergy, avoid lupin and products containing lupin. This can be challenging, as lupin is only sometimes listed as an ingredient on food labels. It's essential to read labels carefully and avoid foods containing lupins, such as some types of bread, pasta, and snacks.

It's also a good idea to carry an epinephrine injector if a severe allergic reaction occurs. An epinephrine injector is a device that can be used to quickly administer a dose of medication to help reduce the symptoms of anaphylaxis.

If you think you may have a lupin allergy, it's important to see a doctor for proper diagnosis and treatment. Avoiding lupin and carrying an epinephrine injector can help prevent allergic reactions and keep you safe.

It's also a good idea to inform your friends, family, and coworkers about your lupin allergy so that they can help you avoid lupin and be prepared in case of an allergic reaction.

If you have a lupin allergy, it's important to check food labels carefully, as lupin may be present in some unexpected places. For example, lupin flour is sometimes a gluten-free alternative to wheat flour, which you can find in gluten-free products. Lupin may also be used as a flavouring or ingredient in some processed foods, such as snacks and frozen meals.

It's also a good idea to be cautious when eating at restaurants or trying new foods, as lupin may be present in some dishes without being listed on the menu. Ask the server or chef about the ingredients used in a dish before ordering, and avoid dishes containing lupin.

Your doctor may recommend other treatments to help manage your allergy. It may include medications, such as antihistamines, to help relieve symptoms of an allergic reaction. In severe cases, your doctor may also recommend immunotherapy. This treatment can help your body become less sensitive to lupin and other allergens.



Lupin allergy is a serious food allergy that can be life-threatening. People with a peanut allergy should be aware that lupins are related to peanuts and are in the same family of plants. It means they may also be allergic to lupins. Currently, there are no labelling requirements for foods containing lupin, which makes it difficult for those with allergies or those without them to avoid exposure.

There is currently no cure for allergies, but it's essential to know your exposure and take steps toward preventing future reactions by avoiding triggers like this. For example: If you know you have had an exposure in the past few days/weeks (and your symptoms aren't consistent with other illnesses), then avoid any situation where you could come into contact with lupin again until your body has healed from its effects on you last time around. Stay at home until the symptoms have faded away completely!

For best results, we recommend a simple home test to find out all your intolerances and allergies.

To learn about how allergy tablets work read our informative article. Or if you would like to learn more about what is a food sensitivity test, read more on Welzo!

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