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Food Allergy: Causes, Symptoms and Protection 2020.

Food Allergy (Causes, Symptoms and Protection)2020.

Food Allergy 

"Food allergy is an abnormal response to a food triggered by the body's immune system. "Allergic reaction to food can cause serious illness and ,in some cases ,death. If you have food allergy ,it is important for you to work with your healthcare provider to find out what food cause you allergic reaction.

 Food allergen 

A normally harmless substance that triggers an allergic reaction. Most of the allergens are proteins(an exemption is a sugar molecule which cause mammalian meat allergy) and there are generally several kind of allergens in each food, it is not yet clear what makes some foods proteins allergenic, and not others.

The development of an allergy occurs in two stages:


When a person first eats the allergen and produce antibodies(IgE or immunoglobulin E), which arms the immune system. IgE ,is a type of protein that works against  specific food.


When the person eats the allergen again, the allergen triggers the now armed immune system, which leads to the allergic symptoms.

Which foods may cause allergy?

More than 120 foods have been described as causing food allergies. However the 8 foods that most commonly cause serious allergic reactions. 

Milk, Egg, Peanut, Tree nut, Wheat, Soy, Fish, Crustacean.


This include celery stalk, leaves, seeds and the root called celeriac .You can find celery in celery salt, salad, some meat products, soups and stock cubes.

2)Cereal contain gluten

Wheat, rye, barley and oats containing gluten.


Crabs, lobster, prawns and scampi are crustaceans.


Eggs are often found in cakes, meats products, mayonnaise, mousses, pasta, quiches, sauces and pastries etc.


You will find this in some fish sauces, pizzas ,relishes, salad dressing, stock cubes and sauce.


Lupin is a flower, but it's also found in flour .Lupin flour and seeds can be used in some type of bread, pastries and even in pasta.


Milk is a common ingredient in butter, cheese, cream, ice-cream, milk powder, and can also be found in foods brushed or glazed with milk, and in powdered soups and sauces.


These include mussels, land snail, squid and whelks but can also be commonly found in oyster sauce or as an ingredient in fish stews.


Liquid mustard, mustard powder and mustard seeds fall into this category. This ingredient can also be found in bread curries, meat products, salad dressings, sauces and soups.


Cashew nuts, almonds, and hazel nut you can found in breads, biscuits, cake, dessert, nut oils and sauces.


Peanuts are actually a legume and grow underground also called as groundnut. Peanuts are often used as an ingredients in biscuits, curries, desserts, sauces as well as in groundnut oil and peanut flour.

12)Sesame seeds

These seeds can also found in bread, bread sticks, sesame oil.


Often found in bean curd, edamame beans, miso paste, tofu, dessert, vegetarian products.


This ingredients often used in dried fruit such as raisins, dried apricot etc.
If you have asthma ,you have a high risk of developing a reaction to sulphur dioxide.

What are the symptoms of food allergies?

Allergic reaction to foods generally occurs within a few minutes to one hour after eating the offending food but reaction may be delayed for anything up to 48 hours. Symptoms can last for minutes through to day or in rare case even for weeks. The symptoms generally arise every time the offending food is eaten.


The most frequent symptom of food allergies are itching and swelling of the mouth. Oral itching can be an initial symptom in any kind of food allergy.

Eyes and nose

The eyes and nose may show hay fever-like symptoms. The conjunctiva of the eye may swell dramatically and become itchy and red. Sneezing an itchy and runny or stuffed nose may be experienced.

Facial oedema

 Swelling under skin usually affect lips, eye lids and ear. In some patients even cheeks. The symptoms are scary, but never life-threatening by themselves.


Asthmatic symptoms such as wheezing, breathlessness and coughing may arise from the lungs.


Symptoms from the gut include pain, bloating, sickness, vomiting and diarrhea.


On the skin, acute urticaria with itchy, well defined white or pale red swelling can appear. This rash is generally short-lived, disappearing within a few hours. Chronic nettle rash is rarely associated with food allergy.


Anaphylaxis is an acute allergic reaction in rare cases, multiple organ systems are affected and death can occur in as little as ten minutes.


Difficulty in breathing ,struggle for air.


Blood pressure drop, lose consciousness.

Way to save

"Avoidance of the allergic foods is the only protection".


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