Seed Allergies: Symptoms, Testing and Treatment Guide
Seeds are an increasingly common feature in the modern UK diet, found in everything from breads and cereals to health foods and international cuisine. While they are a great source of nutrition, for some people, they can trigger an allergic reaction.
Like nuts, seeds contain specific 'storage proteins' that are essential for the plant's growth. It is typically these robust proteins that the human immune system mistakenly identifies as a threat. The allergens in seeds are very stable, meaning they aren't broken down by heat during cooking and are digested slowly, giving them time to cause a reaction.
Common Seed Allergies in the UK
In our specialist allergy clinics, the most frequent seed allergies we diagnose and manage are:
Sesame
Mustard
Poppy Seed
It is far less common to be allergic to:
Chia seeds
Linseeds and flaxseeds (these refer to the same seed, derived from Linum usitatissimum L).
These seeds are small and contain relatively little protein per seed. This is why some individuals might tolerate a few seeds sprinkled on a bread roll or use the seed's oil without issue. However, when these seeds are ground into pastes or flours (like tahini in hummus), the allergenic proteins are released and become highly concentrated. This significant protein load is much more likely to cause an allergic reaction. Nonetheless, it is safer to avoid all possible dietary forms of the seed if allergic.
Dr Foong and Prof du Toit of the London Allergy Consultants team have published extensively on sesame allergy.
Understanding Test Results: Sensitisation vs. True Allergy
A common concern among families dealing with a single seed allergy is whether other seeds will also cause a reaction. Allergy testing can sometimes add to this confusion.
A broad allergy test might show positive results for multiple seeds. This is often due to 'cross-reactivity', where the proteins in one seed look similar to those in another. A positive test shows that your body is 'sensitised' to that seed, but it does not automatically mean you will have an allergic reaction if you eat it.
In fact, far more patients who are sensitised to a seed will tolerate eating it than will react to it. A classic example in the UK involves patients with peanut allergy. Tests for fenugreek and lupine (both legumes, such as peanuts) are often positive, but clinical reactions to eating them are very rare.
Our Diagnostic Process: Achieving Certainty
At London Allergy Consultants, our priority is to move beyond diagnostic uncertainty. We achieve a precise diagnosis through a careful, structured process:
Detailed Medical History: We listen carefully to understand your or your child's experiences and symptoms.
Precise Allergy Testing: We use skin prick or specific IgE blood tests to identify sensitisations.
Oral Food Challenges: The 'gold standard' for diagnosis. This is a medically supervised procedure where a patient consumes a tiny, gradually increasing amount of the seed to determine for sure if it is tolerated.
To ensure patient safety, lower-risk challenges are performed in our outpatient clinics. In contrast, higher-risk challenges are undertaken in our dedicated Allergy Centre of Excellence (ACE), where advanced monitoring and support are available.
Advanced Treatment and Next Steps
Each seed allergy has its own unique characteristics. For a detailed understanding, please read through the specific seed descriptions on our website. At our Allergy Centre of Excellence (ACE), we also offer pioneering treatments like Oral Immunotherapy (OIT) for sesame and mustard allergies.
If you are unsure which seeds you or your child may be allergic to, we can provide expert guidance. Please visit us at our clinic in London or Surrey, where we can support you through our complete diagnostic and therapeutic process.
Different Type of Seeds Allergy
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Sesame allergy is an immune system reaction to the proteins found in sesame seeds. It's one of the fastest-growing allergies in the UK, partly due to the increasing popularity of foods like hummus, tahini, and halva. While these foods are nutritious and delicious for many, for those with an allergy, they can cause reactions ranging from mild to severe.
Symptoms of a Sesame Allergy
An allergic reaction to sesame typically happens quickly after eating it. Symptoms can include:
Hives (a red, raised, itchy rash), flushing, or swelling of the face, lips, or eyes.
Tingling or itching in the mouth.
Abdominal pain, vomiting, or diarrhoea.
Difficulty breathing, wheezing, or a persistent cough.
In the most serious cases, sesame allergy can cause anaphylaxis, a life-threatening reaction that requires immediate medical attention and the use of an adrenaline auto-injector or Nasal adrenaline device Neffy.
How We Diagnose Sesame Allergy 🩺
A precise diagnosis is the first step toward effective management. At our London clinic, we use a combination of methods to get a complete picture of your allergy.
Clinical History: We begin with a detailed conversation about your symptoms, your dietary habits, and any family history of allergies.
Skin Prick Testing: This simple and quick test involves placing a tiny drop of liquid containing sesame protein on your arm and gently pricking the skin. We often use tahini for this test as it is a potent form of the allergen and provides very reliable results.
Advanced Blood Tests: We measure the level of sesame-specific allergy antibodies (IgE) in your blood. Our clinic uses state-of-the-art platforms (like ALEX® or ImmunoCAP™) for component testing. This means we can identify the exact protein within the sesame seed (such as Ses i 1) that you're allergic to. This advanced detail helps us more accurately predict the severity of potential reactions.
Management and Treatment Options
Strict Avoidance
For most people, the primary management strategy is the strict avoidance of all sesame-containing products. Sesame can be a "hidden" ingredient in many foods, so careful label reading is essential. Common sources include:
Pastes & Dips: Tahini, hummus, baba ghanoush.
Baked Goods: Burger buns, bagels, breadsticks, biscuits.
Cuisines: Often used in Middle Eastern, Asian, and Japanese dishes.
Emergency Preparedness
If you or your child are at risk of anaphylaxis, we will provide you with an emergency action plan and prescribe adrenaline auto-injectors.
Advanced Treatment: Oral Immunotherapy (OIT)
For suitable patients, our specialist Allergy Centre of Excellence offers Sesame Oral Immunotherapy (OIT). OIT is a cutting-edge treatment that aims to desensitise the immune system. It involves eating a tiny, gradually increasing amount of sesame protein each day under strict medical supervision.
The goal of OIT is to build tolerance, significantly reducing the risk of a severe reaction to accidental exposure and improving quality of life. We find that the earlier this treatment is started in childhood, the easier and more successful the journey often is. However, OIT is a significant commitment and is not suitable for every family.
If you are concerned about a potential sesame allergy, please contact us to schedule a consultation.
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Understanding Mustard Allergy
A mustard allergy is an immune system reaction to the proteins found in mustard seeds. When you eat mustard, your body mistakenly identifies these proteins as harmful and releases chemicals, like histamine, to 'defend' itself. This is what causes allergic symptoms.
The proteins in mustard are very tough; they aren't broken down by cooking or digestion. This means that whether the mustard is cooked in a sauce, used as a spice, or eaten raw, it can still trigger a reaction.
Symptoms of a Mustard Allergy
Reactions can vary from person to person and can happen very quickly after eating. Symptoms can include:
Mild reactions: Itchy skin (hives), a rash, swelling (especially around the lips and face), or an itchy mouth.
Moderate reactions: Stomach cramps, vomiting, or diarrhoea.
Severe reactions: Difficulty breathing, dizziness, or a drop in blood pressure.
In the most serious cases, a mustard allergy can cause anaphylaxis, a life-threatening reaction that requires immediate medical attention. ⚠️
Cross-Reactivity: The Link to Other Allergies
If you have a mustard allergy, you might find you're also sensitive to other foods. This is called cross-reactivity. It happens because the proteins in mustard are similar in structure to proteins in other plants. Your immune system gets confused and reacts to them as well.
Common cross-reactivities with mustard include:
Other plants in the Brassicaceae family (like broccoli, cabbage, and rapeseed oil).
Nuts and legumes.
Certain fruits (like peaches and apples).
Mugwort pollen (a common cause of hay fever).
It's important to note that just because you're allergic to mustard, it doesn't automatically mean you'll react to these other foods. Testing can help clarify any specific triggers.
Diagnosis and Management
If you suspect you have a mustard allergy, it's essential to see a doctor or an allergy specialist. A diagnosis is usually made using a combination of:
A detailed clinical history of your reactions.
Allergy testing, such as a skin prick test or a specific IgE blood test.
An oral food challenge, where you eat a tiny, controlled amount of mustard in a safe, clinical setting to confirm the allergy.
The main way to manage a mustard allergy is to strictly avoid it. For those at risk of anaphylaxis, you will be prescribed adrenaline auto-injectors (like an EpiPen® or Jext®) and taught how to use them in an emergency.
Mustard and Food Labelling in the UK
In the UK and the EU, mustard is one of the 14 major allergens that must be legally declared on all pre-packaged food labels.
You should always check the ingredients list, where it will usually be highlighted in bold. Look for phrases like "Contains mustard" in the allergy information box. Be aware that mustard can be a 'hidden' ingredient in many foods, including:
Sauces, dressings, and marinades
Soups and stews
Processed meats like sausages
Spices and curry powders
Pizzas and savoury snacks
Always read labels carefully and don't be afraid to ask about ingredients when eating out.
Oral Immunotherapy to Mustard:
We do offer OIT to mustard in our Allergy Centre of Excellence facility.
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Poppy Seed Allergy: A Guide for Patients in the UK
If you've been diagnosed with a poppy seed allergy or suspect you might have one, this guide is here to provide you with clear and helpful information.
What is a Poppy Seed Allergy?
A poppy seed allergy is a reaction that happens when your immune system mistakenly treats the proteins in poppy seeds as a harmful substance. Your body produces specific antibodies called Immunoglobulin E (IgE) to fight off these 'invaders'. When you next eat poppy seeds, these IgE antibodies trigger the release of chemicals, like histamine, which cause the symptoms of an allergic reaction.
What are the Symptoms?
Reactions to poppy seeds can vary from person to person. Some people may experience mild symptoms, while others can have a much more serious reaction.
Mild to Moderate Symptoms can include:
Oral Allergy Syndrome (OAS): An itchy or tingling sensation in your mouth, lips, or throat.
Skin Reactions: Hives (raised, itchy red bumps), a rash, or swelling (angioedema), often around the face.
Stomach Upset: Nausea, stomach cramps, vomiting, or diarrhoea.
Hay fever-like symptoms: A runny nose, sneezing, or watery eyes.
Severe Symptoms (Anaphylaxis): In some cases, a poppy seed allergy can cause a severe, life-threatening reaction called anaphylaxis. This is a medical emergency and you must call 999 immediately.
Signs of Anaphylaxis include:
Difficulty breathing or wheezing
Tightness in the throat or chest
Feeling faint, dizzy, or collapsing
A sense of impending doom
The Link to Other Allergies (Cross-Reactivity)
Poppy seed allergy is quite rare, but it is often seen in people who already have other allergies, especially to tree nuts (like hazelnut), other seeds (like sesame), or certain pollens.
This happens because the proteins in poppy seeds are very similar in structure to proteins in these other substances. This is called cross-reactivity. Your immune system can't tell the difference and reacts to both, which can sometimes make diagnosis more complicated.
How is a Poppy Seed Allergy Diagnosed?
If you think you might have a poppy seed allergy, it's important to see your GP. They can refer you to an NHS or private allergy specialist for proper testing. The diagnostic process usually involves:
Allergy-Focused History: The specialist will ask detailed questions about your symptoms, what you ate, and your wider medical history.
Skin Prick Test: A tiny drop of liquid containing poppy seed protein is placed on your arm and the skin is gently pricked. A positive reaction usually causes a small, itchy red bump, similar to a mosquito bite.
Specific IgE Blood Test: A blood test can measure the amount of IgE antibodies to poppy seed in your blood.
Oral Food Challenge: If the diagnosis is still unclear, you may be offered a food challenge. This is the 'gold standard' test and is always done in a safe, controlled hospital setting where you will be given tiny, increasing amounts of poppy seed to eat under close medical supervision.
Managing Your Poppy Seed Allergy
As there is currently no cure for food allergies, the main way to manage your condition is to avoid poppy seeds completely.
Be a Label Detective: Carefully check the ingredients list on all pre-packaged foods. Poppy seeds are often found in bread, bagels, cakes, muffins, and salad dressings.
Communicate Clearly: When eating out or ordering takeaways, always inform the staff about your allergy so they can advise you on safe menu choices and prevent cross-contamination in the kitchen.
Be Prepared for an Emergency: If you are diagnosed with a risk of anaphylaxis, you will be prescribed adrenaline auto-injectors (AAIs), such as an EpiPen®, Jext®, or Emerade®. It is vital that you carry two of these with you at all times and know how to use them. Ensure your family, friends, and colleagues also know how to use your device.
Unfortunately, at present, there are no established immunotherapy treatments (like oral or sublingual immunotherapy) available for poppy seed allergy. Strict avoidance and being prepared for a reaction are the most effective ways to stay safe and well.
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A Guide to Chia Seed Allergy
Chia seeds (Salvia hispanica) have become a popular health food in the UK, praised for their nutritional benefits and found in everything from puddings to smoothies. While they are safe for most people, a small number of individuals may experience an allergic reaction to the proteins they contain.
Although a chia seed allergy is considered rare, it's important to recognise the symptoms and understand the risks, especially for those with other food allergies.
Symptoms of a Chia Seed Allergy
An allergic reaction to chia seeds can range from mild to severe. Symptoms may include:
Itching in the mouth or throat
Hives (a red, itchy skin rash) or swelling
Stomach discomfort, nausea, or vomiting
In serious cases, anaphylaxis, a severe and potentially life-threatening reaction requiring immediate medical attention.
The Link to Other Allergies (Cross-Reactivity)
The proteins in chia seeds can be similar to allergens found in other foods. This means that if you have an existing allergy, your immune system might mistake chia seed protein for your known allergen and trigger a reaction.
Key cross-reactivities have been noted with sesame and hazelnut.
The European Food Safety Authority (EFSA) has highlighted that the main safety concern with chia seeds is their potential to cause allergies. They advise caution for anyone with a known seed or nut allergy who is trying chia for the first time.
How We Diagnose a Chia Seed Allergy
Because chia is a relatively new food in our diets, standardised allergy tests are not as widely available as for allergens like peanuts. However, a diagnosis can be effectively made through:
A Detailed Clinical History: A thorough discussion about your symptoms and diet is the most important first step.
Skin Prick and Blood Tests: We can use skin prick tests and specific IgE blood tests to help identify an allergic sensitivity to chia.
Management and Treatment
Avoidance and Emergency Care
The only way to manage a chia seed allergy is through strict avoidance. Always check the labels of health bars, cereals, baked goods, and drinks.
If you are diagnosed with a chia seed allergy, we will provide you with a comprehensive emergency action plan. This may include having antihistamines for mild symptoms and an adrenaline auto-injector (like an EpiPen® or Jext®) for severe reactions.
Treatment Outlook
Currently, there are no established immunotherapy treatments for desensitisation to chia seeds. For this reason, we do not yet offer Oral Immunotherapy (OIT) for chia seed allergy in our Allergy Centre of Excellence (ACE) facility. Management is focused on avoidance and emergency preparedness.
If you are concerned about a possible reaction to chia seeds, we recommend booking a consultation for an expert assessment and personalised advice.
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A Guide to Fenugreek Allergy
Fenugreek is a plant from the legume family, and its seeds are a common spice, especially in South Asian, North African, and Middle Eastern cooking. It's often found in spice blends like curry powder and is also used in some herbal teas and supplements. An allergy to fenugreek is an immune system reaction to the proteins in these seeds.
Reactions can be triggered not just by eating fenugreek, but also by inhaling the powder during cooking or through skin contact.
Symptoms of a Fenugreek Allergy
An allergic reaction to fenugreek can vary in severity. Symptoms may include:
A runny nose, sneezing, and nasal congestion.
Skin reactions like hives (urticaria) or swelling (angioedema).
Breathing difficulties, such as wheezing or bronchospasm.
In severe cases, anaphylaxis, a serious, life-threatening reaction that requires immediate medical intervention.
The Legume Family Link: Cross-Reactivity with Peanuts and Chickpeas
This is a crucial point for anyone with a known legume allergy. Fenugreek is a member of the legume family, alongside peanuts, chickpeas, lentils, peas, and soya.
The proteins in fenugreek are very similar to those in other legumes, particularly peanut and chickpea. This means that individuals with a peanut or chickpea allergy have a significantly higher risk of also reacting to fenugreek. An allergy to fenugreek can exist on its own, but it often appears in those who already have other legume allergies.
How We Diagnose Fenugreek Allergy 🩺
A precise diagnosis is essential, especially given the high chance of cross-reactivity. Our diagnostic process includes:
A Detailed Consultation: We start with a thorough discussion of your symptoms and dietary history.
Skin Prick Testing: This test checks for an immediate allergic reaction on the skin.
Specific IgE Blood Tests: These measure the level of allergy antibodies to fenugreek in your blood.
Oral Food Challenge: When necessary, a medically supervised food challenge—the gold standard for diagnosis—is used to confirm or rule out the allergy.
Management and Treatment
Avoidance and Emergency Care
The primary management for a fenugreek allergy is strict avoidance. It's vital to read ingredient lists carefully, especially on:
Curry powders and pastes
Spice mixes (masala)
Pickles and chutneys
Some herbal teas and supplements
For patients at risk of severe reactions, we will provide an emergency care plan and prescribe an adrenaline auto-injector (e.g., EpiPen®, Jext®).
Treatment Outlook
Currently, there are no established immunotherapy treatments for fenugreek allergy. Therefore, we do not yet offer Oral Immunotherapy (OIT) for fenugreek allergy in our Allergy Centre of Excellence (ACE) facility. The focus of management remains on vigilant avoidance and emergency preparedness.
If you suspect an allergy to fenugreek or are concerned about cross-reactivity with a known legume allergy, please contact our clinic to schedule a consultation.
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A Guide to Lupine Allergy
Lupine (also spelled 'lupin') is a legume from the same plant family as peanuts, peas, and beans. It's increasingly used in the UK food industry, especially in gluten-free products, due to its high protein content. You can find lupine flour and seeds in foods like bread, pastries, pasta, and vegetarian meat substitutes.
Because it can trigger severe allergic reactions, lupine is one of the 14 major allergens that must be legally declared and highlighted on all pre-packaged food labels in the UK.
Symptoms of a Lupine Allergy
A reaction to lupine can be triggered by very small amounts and can range from mild to life-threatening. Symptoms may include:
Itching in the mouth (Oral Allergy Syndrome)
Hives (a red, itchy rash) or swelling (angioedema)
Stomach pain or vomiting
Difficulty breathing or wheezing
In severe cases, anaphylaxis, a life-threatening reaction requiring immediate medical help.
Occupational Allergy: People who work with lupine flour, such as bakers, can also develop respiratory allergies like rhinitis (runny nose) or asthma from inhaling the powder.
The Peanut Connection: A Critical Warning ⚠️
The link between lupine and peanut allergy
High Risk of Cross-Reactivity: As close botanical relatives, the proteins in lupine and peanuts are very similar. Studies show that up to 44% of people with a peanut allergy will also have IgE sensisation to lupine; but thankfully this seldom translates to clinical allergy, ie most patients can still eat and tolerate lupine. Our clinic will help you to differentiate between clinically relevent IgE sensitisation and ‘immunological cross reactive noise’ that is of no allergy risk to you.
How We Diagnose Lupine Allergy
Given the potential for severe reactions, a formal diagnosis is essential. Our comprehensive diagnostic process includes:
A Detailed Clinical History: We'll discuss your symptoms and dietary history in full.
Skin Prick Testing: This test can quickly indicate a sensitivity to lupine.
Specific IgE Blood Tests: These tests measure the level of allergy antibodies to lupine in your bloodstream.
Oral Food Challenge: This medically supervised test is the 'gold standard' for confirming or ruling out a food allergy with certainty.
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An allergy to pumpkin seeds is an immune system reaction to proteins found within the seeds of a pumpkin. While considered uncommon, this allergy is important to recognise as pumpkin seeds are a popular healthy snack and a common ingredient in bread, salads, and granola bars.
Symptoms of a Pumpkin Seed Allergy
An allergic reaction can range from mild to severe and may be triggered by eating the seeds or, less commonly, inhaling dust from them.
Symptoms can include:
Mild Reactions: Itching, tingling, or swelling in and around the mouth (Oral Allergy Syndrome).
Skin Reactions: Hives (a red, itchy rash) or swelling (angioedema).
Respiratory Issues: Difficulty breathing or wheezing.
Severe Reactions: In rare cases, a pumpkin seed allergy can cause anaphylaxis, a serious and potentially life-threatening reaction that requires immediate medical help.
An Important Distinction: Seeds vs. Flesh 🎃
A key feature of this allergy is that the allergenic proteins are concentrated in the seed. Many people who are allergic to pumpkin seeds find that they can safely eat the pumpkin flesh (pulp) without any issues.
However, this is not guaranteed for everyone and must be confirmed by an allergy specialist. You should never assume the flesh is safe to eat without a proper medical evaluation.
How We Diagnose Pumpkin Seed Allergy
A clear diagnosis is the first step to managing the allergy safely. Our diagnostic process includes:
A Detailed Consultation: We start with a thorough discussion about your symptoms and diet.
Skin Prick Testing: This simple test can quickly indicate an allergic sensitisation to pumpkin seed.
Specific IgE Blood Tests: A blood test measures the allergy antibodies to pumpkin seed protein in your system.
Because the proteins in pumpkin seeds can be similar to those in other nuts and seeds, we will also investigate any potential cross-reactivities as part of your evaluation.
Management and Treatment
Strict Avoidance and Emergency Care
The only way to manage a pumpkin seed allergy is by strictly avoiding the seeds and products containing them, such as pumpkin seed oil. Always check the labels on:
Snack mixes
Multi-seed breads and crackers
Salad toppings
Granola and health bars
For those at risk of a severe reaction, we will provide a comprehensive emergency action plan and prescribe an adrenaline auto-injector (e.g., EpiPen®, Jext®).
Treatment Outlook
Currently, there are no established immunotherapy treatments for pumpkin seed allergy. Therefore, we do not yet offer Oral Immunotherapy (OIT) for pumpkin seed allergy in our Allergy Centre of Excellence (ACE) facility. The focus remains on careful avoidance and being prepared for emergencies.
If you are concerned about a potential reaction to pumpkin seeds, please contact our clinic to schedule a consultation for an expert assessment.
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A Guide to Linseed (Flaxseed) Allergy
First, let's clarify the names: linseed and flaxseed are different terms for the same seed from the Linum usitatissimum plant. In the UK, we traditionally use the term 'linseed', while 'flaxseed' is more common in North America. Today, the names are often used interchangeably on food products.
An allergy to linseed is an immune system reaction to the proteins in these seeds. With their growing popularity in health foods, they are now found in everything from bread and cereals to smoothies and supplements, making awareness of a potential allergy more important than ever.
Symptoms of a Linseed/Flaxseed Allergy
An allergic reaction to linseed can range from mild to severe. Symptoms may include:
Skin Reactions: Hives (a red, itchy rash) or swelling (angioedema).
Gastrointestinal issues: Stomach cramps or vomiting.
Severe Reactions: In some cases, a linseed allergy can cause anaphylaxis, a serious, life-threatening reaction that requires immediate emergency treatment.
A Potential Link to Peanut and Cashew Allergy 🥜
Research has identified that some of the allergenic proteins in linseed are structurally similar to those in certain tree nuts and legumes.
This means there is a potential for cross-reactivity, particularly with peanut and cashew nut. While not everyone with a peanut or cashew allergy will react to linseed, the risk exists. If you have a known nut allergy, you should be cautious and seek specialist advice before consuming linseed products.
How We Diagnose Linseed/Flaxseed Allergy
While linseed allergy is considered uncommon, a precise diagnosis is key to managing it safely. Our diagnostic process includes:
A Detailed Clinical History: We start with an in-depth conversation about your symptoms and diet.
Skin Prick Testing: This test can quickly show an allergic sensitisation to linseed.
Specific IgE Blood Tests: A blood test can measure the level of allergy antibodies to linseed.
Expert interpretation of these tests is crucial, as standardised testing reagents for linseed are not as common as for other major allergens.
Management and Treatment
Strict Avoidance and Emergency Care
The only way to manage a linseed allergy is through strict avoidance. It's important to read labels carefully, as linseed can be found in:
Multi-seed breads, crackers, and cereals
Health bars and granola
Smoothie mixes and "superfood" powders
Vegan products, where it is sometimes used as an egg substitute ('flax egg')
For patients at risk of anaphylaxis, we will provide a comprehensive emergency care plan and prescribe an adrenaline auto-injector (e.g., EpiPen®, Jext®).
Treatment Outlook
Currently, there are no established immunotherapy treatments for linseed/flaxseed allergy. Therefore, we do not yet offer Oral Immunotherapy (OIT) for linseed/flaxseed allergy in our Allergy Centre of Excellence (ACE) facility. Management is focused on vigilant avoidance and emergency preparedness.
If you are concerned about a potential reaction to linseed or its link to a nut allergy, please contact our clinic to schedule a consultation.
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A Guide to Sunflower Seed Allergy
An allergy to sunflower seeds is an immune system reaction to the proteins found in the seeds of the sunflower plant. They are a very common food in the UK, eaten as a snack and used as an ingredient in multi-seed breads, cereals, and granola bars. Sunflower oil is a widely used cooking oil, and sunflower seed butter is a popular alternative to peanut butter.
Symptoms of a Sunflower Seed Allergy
Reactions to sunflower seeds can vary from mild to severe. Interestingly, symptoms can be triggered not just by eating them but also by inhaling dust from the seeds, for example, when handling bird feed.
Symptoms can include:
Oral Symptoms: Itching, tingling, or swelling in the mouth and throat (Oral Allergy Syndrome).
Skin Reactions: Hives (a red, itchy rash), eczema, or swelling (angioedema).
Respiratory Issues: A runny nose, sneezing, or asthma-like symptoms (especially from inhalation).
Severe Reactions: In some cases, a sunflower seed allergy can cause anaphylaxis, a serious and potentially life-threatening reaction that requires immediate medical attention.
The Hay Fever Connection: Mugwort Pollen 🌿
Sunflower is a member of the Asteraceae (or Compositae) plant family, which includes plants like chamomile, ragweed (thankfully, uncommon in UK), and mugwort.
A significant number of people with a sunflower seed allergy also suffer from hay fever, particularly an allergy to mugwort pollen, which is common in the UK from late summer to early autumn. This is a type of cross-reactivity, where the immune system recognises similarities between the proteins in the pollen and the proteins in the seed, triggering a reaction to both. This can sometimes also be linked to mild reactions to other foods like melon, cucumber, and celery.
How We Diagnose Sunflower Seed Allergy
A clear diagnosis is crucial for safe management. Our comprehensive diagnostic process includes:
A Detailed Consultation: We start with an in-depth discussion of your symptoms and potential exposure to sunflower seeds.
Skin Prick Testing: This simple test can quickly indicate an allergic sensitisation to sunflower seed proteins.
Specific IgE Blood Tests: A blood test measures the level of allergy antibodies to sunflower seeds in your system.
Management and Treatment
Strict Avoidance and Emergency Care
The primary management for a sunflower seed allergy is strict avoidance. It's important to check the labels on:
Snack packs and trail mixes
Multi-seed breads, crackers, and bagels
Cereals and granola bars
Sunflower butter or spreads (e.g., Sun-butter)
Sunflower Oil: Highly refined sunflower oil is usually safe for most allergic individuals as the protein is removed. However, cold-pressed, unrefined, or gourmet oils may contain protein and pose a risk. We advise discussing this with a specialist.
For patients at risk of a severe reaction, we will provide a clear emergency action plan and prescribe an adrenaline auto-injector (e.g., EpiPen®, Jext®).
Treatment Outlook
Currently, there are no established immunotherapy treatments for sunflower seed allergy. Therefore, we do not yet offer Oral Immunotherapy (OIT) for sunflower seed allergy in our Allergy Centre of Excellence (ACE) facility. Management is focused on vigilant avoidance and emergency preparedness.
If you are concerned about a potential reaction to sunflower seeds, please contact our clinic to schedule a consultation for an expert assessment.
Worried About Allergies? Let’s Help You Get Answers
If your child is showing signs of a food, pollen, or skin allergy, early diagnosis is key. At London Allergy Consultants, our expert team provides trusted, evidence-based care tailored to your child’s needs. From testing to treatment plans, we guide you every step of the way.
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Cashew nut allergy is a common tree nut allergy in the UK. It is seldom outgrown and can cause severe reactions. Cashews and pistachios share highly homologous proteins, meaning an allergy to one usually necessitates strict avoidance of both. We offer OIT to Cashew at our ACE clinics in the UK.