Food sensitivity test in Seoul: what actually works

How we approach a food sensitivity test in Seoul

People use the phrase food sensitivity for very different problems: true food allergy, celiac disease, lactose intolerance, irritable bowel syndrome triggered by certain carbohydrates, reflux, or reactions to alcohol and spicy food. Each has a different cause and a different test, and some have no blood test at all. A food sensitivity test in Seoul at VEI Clinic therefore begins with your story: what you eat, what happens, how quickly, and how often.

Dr. HyunSung Park is a board-certified internal medicine specialist and gastroenterology subspecialist, so digestive symptoms are a core part of his work. He uses your history to decide which questions can be answered by a test and which are better answered by a carefully planned diet trial.

Why we do not rely on IgG food panels

Many clinics and online companies sell large IgG food sensitivity panels that test 100 or more foods. IgG antibodies to foods are a normal response to eating them; they mostly show what you have been exposed to, not what makes you unwell. Allergy societies in the United States, Canada and Europe have advised against using IgG food tests to diagnose food allergy or intolerance.

The practical harm is real. These panels often flag foods you eat most, such as egg, milk, wheat or rice, leading to long restriction lists, nutritional gaps, social stress and sometimes no improvement because the real cause was missed. If you already have an IgG result, bring it; Dr. Park will explain what it can and cannot tell you.

Tests that can help, depending on your symptoms

• IgE allergy blood tests, for fast reactions such as hives, lip swelling or wheezing soon after a specific food
• Celiac disease blood tests (tissue transglutaminase IgA with total IgA), done while you are still eating gluten
• SIBO test, when bloating and gas suggest small intestinal bacterial overgrowth
• Basic blood tests, such as blood count, iron and inflammation markers, to look for signs that something more than a sensitivity is going on
• H. pylori testing or abdominal ultrasound when upper abdominal pain is part of the picture

The elimination and reintroduction plan

For intolerance and IBS-type symptoms, the most reliable test is usually your own body, observed carefully. We ask you to keep a food and symptom diary for two to four weeks. Then, if appropriate, you remove a short list of suspected foods for a limited time and reintroduce them one at a time to see what really triggers symptoms. A low-FODMAP approach is one well-studied option for IBS.

The goal is the least restrictive diet that controls your symptoms, not permanent avoidance. Many people find they tolerate small amounts of a food perfectly well, which matters when you are eating out in Seoul or traveling.

Who this suits, and limits to know

This approach suits adults with recurrent bloating, cramps, loose stools or reflux linked to eating, people who suspect lactose or gluten problems, and anyone confused by a previous sensitivity panel. It is not right for suspected severe food allergy, which needs an allergist and sometimes a supervised food challenge; we can refer you. People with a history of eating disorders should not undertake restrictive diets without close support.

Life in Korea brings its own patterns. Some newcomers notice more bloating from a sudden change in diet, such as more fermented foods, spicy stews, wheat noodles or late-night delivery meals, while others react to dairy in cafe drinks. Facial flushing and a racing heart after alcohol is usually related to how the body breaks down alcohol, not an allergy. Sorting out these everyday triggers often brings relief without any special test at all.

Red flags that need more than a food test

See a doctor promptly for blood in the stool, black stools, unexplained weight loss, difficulty swallowing, persistent vomiting, anemia, night-time diarrhea or new symptoms after age 50. These can signal conditions that need endoscopy or other investigation, which we can arrange by referral to a hospital. If you have throat swelling, trouble breathing or fainting after food, call 119 immediately.