Food Allergen Test: The Path to a Safe and Comfortable Life

When food becomes a source of problems

Marina from Kyiv noticed that after eating certain foods, she would experience itching, fatigue, and sometimes even swelling of her lips. She started avoiding everything from chocolate to apples, but the symptoms would return. It was only after a food allergen test that it was revealed that her body was reacting to a specific protein component of kiwi and nuts. After eliminating these foods, her condition improved significantly.

«"Food allergies are often disguised as other problems — gastritis, fatigue, acne. Testing helps to accurately identify the cause and get rid of chronic discomfort,", — says allergist Svitlana Hrynevych.

What is a food allergy and how is it different from an intolerance?

A food allergy is a reaction of the immune system to a substance that is safe for others. In response to contact with the allergen (most often a protein), the body produces immunoglobulin E (IgE), which triggers a number of reactions: itching, rash, swelling, digestive disorders or even anaphylaxis.

In contrast, food intolerance is associated with enzyme deficiency or metabolic disorders (e.g. lactose or histamine intolerance). It does not cause an immediate reaction, but it impairs the quality of life.

Who needs a food allergen test?

• Patients with frequent rashes or itching after eating

• Children with suspected atopic dermatitis or bronchial asthma

• People from chronic fatigue, headache, bloating after meals

• At unexplained intestinal disorders

• If there is family history of allergies or autoimmune diseases

• Before transition to complementary foods in children

• At dietary changes (veganism, diets, moving)

Doctor's quote:
«"I recommend getting tested not only if you have severe symptoms. Even mild food sensitivities can build up and cause chronic problems,", — notes immunologist Oleksandr Brovarenko.

Types of food allergy tests: what to choose

1. Skin prick tests (Prick testing)

Drops of allergens are applied to the skin of the forearm and microinjections are made. After 15 minutes, the reaction is assessed.

• Advantages: fast, inexpensive

• Disadvantages: cannot take antihistamines; sometimes false positive results

2. Blood test for specific IgE (in vitro)

The study determines the level of immunoglobulin E to individual food proteins.

• Advantages: safe, suitable even for children

• Disadvantages: only IgE-dependent allergies

3. Multiplex analysis (ALEX2, ImmunoCAP ISAC)

The most modern method. Blood test identifies over 300 allergens and their components.

• Advantages: high accuracy, ability to detect cross-reactions

• Disadvantages: higher cost, difficulty in interpretation

Table: most common food allergens

Preparing for the test

• Skin tests: stop antihistamines 5–7 days in advance

• Blood test: It is advisable to take the test in the morning, not on an empty stomach.

• You should not change your diet the day before the test. — this may affect the interpretation

What gives the result and what to do with it

• IgE level to each allergen (class 0–6)

• Identifying the "culprit" protein, not just product groups

• Ability to create a safe diet

• Avoiding serious allergic complications

After the test, the doctor will help you make a individual diet and will explain which foods can be gradually reintroduced into the diet, and which should be avoided completely.

Food allergies are not a reason to live in restrictions if you know exactly what to avoid. Modern tests allow you not only to diagnose the problem, but also to take a step towards a better quality of life without unexpected reactions.