Prediabetes clinic in Seoul: catch it early, turn it around

What a prediabetes clinic in Seoul actually does

Prediabetes means your blood sugar is higher than normal but not yet in the diabetes range. It usually causes no symptoms, so most people discover it on a routine checkup or an employer health screening. At our prediabetes clinic in Seoul, the goal is simple: confirm the diagnosis properly, find out what is driving it, and give you a plan you can actually follow.

Dr. HyunSung Park reviews your results with you in English, explains what each number means for you specifically, and sets a target and a date to retest. Many expats bring Korean checkup reports they cannot fully read; we can go through those line by line.

The numbers that define prediabetes

Doctors in Korea and internationally use the same core cutoffs. One abnormal result is a signal; a repeat test or a second, different test helps confirm it.

• HbA1c 5.7–6.4%: your average blood sugar over roughly the past three months. 6.5% or above suggests diabetes.
• Fasting plasma glucose 100–125 mg/dL after at least 8 hours without food. 126 mg/dL or above suggests diabetes.
• Two-hour oral glucose tolerance test 140–199 mg/dL, used when the picture is unclear.
• Supporting tests: cholesterol and triglycerides, liver enzymes, kidney function, blood pressure, waist size and sometimes fasting insulin.

Your reversal plan, step by step

Large studies such as the U.S. Diabetes Prevention Program showed that losing around 5–7% of body weight and doing about 150 minutes a week of brisk activity substantially lowered the chance of progressing to type 2 diabetes. That is the backbone of our approach, adapted to life in Seoul.

In practice that often means rethinking white rice and noodle portions, late-night chimaek and convenience-store snacks, sweet coffee drinks, and long sitting hours. Short walks after meals are surprisingly effective at blunting glucose spikes. Sleep and stress matter too: poor sleep makes insulin work less well.

For some people, medication is reasonable. Metformin may be considered when risk is high, for example with a high BMI or a history of gestational diabetes. When obesity is part of the picture, Dr. Park can discuss medical weight loss options such as semaglutide or tirzepatide, including their side effects and who should not use them. Medication supports lifestyle change; it does not replace it.

Who should get checked, and who needs a different pathway

Testing makes sense if you are over 35, carry extra weight around the middle, have a parent or sibling with type 2 diabetes, had diabetes in pregnancy, have high blood pressure or cholesterol, or have been told you have fatty liver. People of East and South Asian ancestry can develop insulin resistance at lower body weights, so a normal BMI does not rule it out.

If your results are already in the diabetes range, or you are pregnant, the plan is different and follow-up is closer. People with type 1 diabetes in the family, rapid weight loss or very high readings need prompt evaluation rather than a lifestyle-only plan.

Living in Seoul with prediabetes: practical swaps

Small, repeatable changes beat dramatic diets. Many patients find it easier to change how they eat Korean food than to stop eating it.

Long-term success usually comes from two or three habits you keep, not ten you abandon after a month. We review which ones are working at each retest.

• Ask for half rice (반공기) or swap some white rice for multigrain rice (japgokbap).
• Start meals with banchan vegetables and protein before the rice or noodles.
• Choose unsweetened Americano or tea over syrup-based lattes and fruit smoothies.
• Use stairs at subway stations and take a 10–15 minute walk after lunch and dinner.
• Keep evening drinking and late delivery food for occasional, not routine, nights.

Red flags: when it is not 'just prediabetes'

Prediabetes itself is silent. If you notice symptoms, your sugar may already be higher than you think. Book a prompt visit if you have strong thirst, frequent urination, unexplained weight loss, blurred vision or slow-healing wounds.

Go to an emergency room or call 119 in Korea if you have vomiting with deep or rapid breathing, confusion or extreme drowsiness, a fruity smell on the breath, or signs of severe dehydration. These can signal a dangerous high-sugar emergency. Chest pain, sudden weakness on one side or trouble speaking also need emergency care.