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Food Allergy Know All About Food Allergies

The food allergy is an abnormal reaction of the body’s defense following the ingestion of a food. Often, the symptoms are mild: tingling on the lips, itching or rashes. But for some people, the allergy can be very serious and even deadly. You must ban the food or foods in question. In France, 50 to 80 people die each year from a food allergy. I remember last year i visited Morocco with my wife. I became the victim of food allergy there. Thanks MoroccanZest, they assist and let me know why i became the victim of food allergy here. MoroccanZest actually are tours guide there in Morocco and help tourist to make their visit memorable. They guide people which places, they should visit, food they should try, what they should wear in Morocco. Anyhow, lets get back to main topic food allergy symptoms.

Food allergies usually appear before the age of 4 years. At this age, the digestive system as well as the immune system is not yet mature, making it more susceptible to allergies. There is no cure. The only solution is to ban the consumption of allergenic foods and move towards healthy food.

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Symptoms of food allergy

The signs of allergy usually appear within minutes of the absorption of food (up to 2 hours).

Their nature and intensity vary from person to person. They may include any of the following symptoms, alone or in combination.

Coetaneous symptoms: itching, rashes, redness, swelling of the lips, face and limbs.

Respiratory symptoms: wheezing, feeling of swelling of the throat, difficulty breathing, choking sensation.

Digestive symptoms: abdominal cramps, diarrhea, colic, nausea and vomiting. (If these are the only symptoms detected, it is rare that the cause is a food allergy.)

Cardiovascular symptoms: pallor, weak pulse, dizziness, loss of consciousness.


For anaphylactic reaction, the symptoms must be very pronounced. Usually, more than one system is affected (skin, respiratory, digestive, and cardiovascular).

For anaphylactic shock, there must be a drop in blood pressure. It can lead to loss of consciousness, arrhythmia and even death.

Diagnostic  of Food Allergy

The doctor usually starts by learning about the patient’s personal and family history. He asks questions about the occurrence of symptoms, the contents of meals and snacks, etc. Finally, he completes his diagnosis by carrying out one or the other of the following tests, as the case may be.

Skin tests. A drop of a series of solutions each containing a small amount of allergen is applied to different spots on the skin. Then, with the help of a needle, the skin is slightly pricked where the extract is.

Blood tests. The UNICAP laboratory test makes it possible to measure in a blood sample the amount of antibodies (“Age” or immunoglobulin E) specific to a particular food.

Provocation test. This test requires the ingestion of a progressive amount of a food. It is only practiced at the hospital, with an allergist.

The main allergenic foods

The most allergenic foods are not the same from one country to another. They vary in particular according to the type of food. For example, in Japan, allergy to rice predominates, while in Scandinavia it is allergy to fish. In Canada, the following foods account for approximately 90% of serious food allergies.

Peanuts (peanuts) :-

shelled fruits (almonds, brazil nuts, cashews, hazelnuts or filberts, macadamia nuts, pecans, pine nuts, pistachios, walnuts);

  • Cow’s milk;
  • Eggs;
  • The fish;
  • Seafood (especially crab, lobster and shrimp);
  • Soybeans;

Wheat (and parent varieties of cereals: kamut, spelled, triticale);

Sesame seeds.

Cow’s milk allergy is the most common in infants before the introduction of solid foods. This is the case for about 2.5% of newborns.

Cross Allergies

These are allergies to substances that are chemically similar. Thus, an individual allergic to cow’s milk is likely to be allergic to goat’s milk, because of the similarity of their proteins.

Some people who are allergic to a particular food prefer to abstain from eating other foods in the same family lest they trigger a serious reaction. However, it is best to consult a doctor before making such a decision, as excluding foods can create deficiencies. Skin tests reveal cross-allergies.

Here is an overview of the main cross-allergies.

People with allergies to pollen may also be allergic to fresh fruits or vegetables, or nuts. This is called oral allergy syndrome. For example, an individual allergic to birch pollen could be itchy on the lips, tongue, palate and throat when eating an apple or raw carrot. Sometimes swelling of the lips, tongue and uvula, as well as a feeling of tightness in the throat may occur. The symptoms of this syndrome are usually mild and the risk of anaphylaxisis weak. This reaction occurs only with raw products since cooking destroys the allergen by altering the structure of the protein. Oral allergy syndrome is a form of cross allergy.


  • Allergies that tend to subside or disappear over time: allergies to cow’s milk, eggs and soy.
  • Allergies that tend to persist throughout life: peanut, nut, fish, seafood and sesame allergies.

Anaphylactic reaction and shock

It is estimated that 1% to 2% of the Canadian population is at risk of anaphylactic reaction, 6 a severe and sudden allergic reaction. About one in three times, the anaphylactic reaction is caused by a food allergy 3. If left untreated, the anaphylactic reaction may progress to anaphylactic shock, i.e., drop in blood pressure, loss of consciousness, and possibly death within minutes (see symptoms below). -Dessau’s). The word anaphylaxis comes from the Greek  Ana  = opposite and  phulaxis  = protection, to signify that this response of the body goes against what one desires.

Peanut ,  nut ,  fish  and  seafood allergies   are most commonly implicated in anaphylactic reactions.

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