VEI Check · Food Sensitivity

Sorting out how food and symptoms relate:
food sensitivity testing

The food sensitivity test (IgG) checks IgG antibody responses to foods and is used as a reference when looking at how your meals relate to your symptoms. It is not an allergy diagnostic test, and results are interpreted with a specialist during a consultation.

VEI Clinic, Gangnam — VEI Check · Food Sensitivity

What to Know About This Test

Food IgG antibodies often reflect a history of eating that food (exposure). A high level does not mean the food does not suit you, so rather than cutting out foods based on the results alone, we interpret them alongside your symptom records.

If an allergic reaction such as hives or difficulty breathing right after eating is suspected, we check with a different method, such as an allergy test (IgE), rather than this test.

Who It May Suit

People with recurring bloating, abdominal pain or bowel changes after certain foods
People who want to sort out how their meals relate to their symptoms
People avoiding many foods who want to review their diet
People concerned about gluten-related problems (celiac testing is done separately)

Before Your Test

Bring a food and symptom diary covering the past 2 to 4 weeks (including times and portions)
Celiac tests are reliable only while you are eating gluten
If you have already stopped gluten, please talk with us before testing
Bring a list of your medications and supplements and any previous allergy test results

After the Test

Rather than long-term avoidance, we suggest briefly removing a food and then reintroducing it to check your response
We aim for the least restrictive diet that keeps symptoms under control
We explain what to do when symptoms flare and when to come back
When needed, we also advise on dietary approaches such as a low-FODMAP diet

The VEI Clinic Approach

After your consultation, an internal medicine specialist decides whether to test and what to test for, then walks you through the results alongside your symptom diary and history. We make changes in stages so that the results alone do not lead to major changes in your diet.

Reactions to food can vary from person to person, and the specialist decides after your consultation whether diet changes or further tests are needed. If you have emergency symptoms, go to an emergency room right away.

FAQ

Frequently asked questions

Should I stop eating foods with high IgG levels?

Not necessarily. IgG often reflects a history of eating that food, so a specialist interprets it together with your symptom records and recommends short-term adjustments only when needed.

Is this the same as an allergy test?

No. The food sensitivity test (IgG) is not an allergy diagnostic test. If an allergic reaction right after eating is suspected, we check it with another method such as an allergy test (IgE).

I have already stopped gluten. Can I have a celiac test?

Celiac tests are reliable only while you are eating gluten. If you have already stopped, we discuss a supervised reintroduction or other ways to check.

How soon will I feel better after changing my diet?

It varies from person to person. When causes are complex, such as irritable bowel symptoms or reflux, we adjust in stages and observe over a longer period.