VEI Check · Nutrition

Before choosing supplements,
checking what you are missing now

Nutritional testing uses blood tests to check your current levels, so that instead of simply adding more supplements, you can decide to replenish only what you need. Based on the results, we put together a plan for meals, supplementation and when to test again.

VEI Clinic, Gangnam — VEI Check · Nutrition

Who This Is For

People with fatigue, poor concentration, or hair or nail concerns
People on a mostly plant-based diet or eating little animal protein
People with digestive conditions or stomach surgery that can affect absorption
People taking medication long term
People with high activity levels or planning pregnancy
People who want an evidence-based supplement plan

What We Test

We do not run every item at once. We choose only what fits your symptoms and eating habits.

Anemia and baseline status: complete blood count (CBC), ferritin, iron, transferrin saturation
Vitamin B12 (with MMA and homocysteine when needed) and folate
Vitamin D
Minerals and micronutrients (case by case): magnesium, zinc, copper, selenium, vitamins B1 and B6, vitamins A, E and K
Omega-3 index (for some patients, sent to an outside lab)
Metabolic status: liver and kidney function, lipids, HbA1c, CRP, and thyroid function when needed

What You Receive With Your Results

Routine items usually take 1 to 3 business days, and items sent to outside labs take about 5 to 14 days.

An explanation that points out the numbers that matter now
A personal supplement plan (types of nutrients and timing with meals)
Food-first guidance: a shopping list and sample meal patterns
When to retest (usually 8 to 12 weeks after changes) and when to stop or adjust

Before Your Test

If lipids or other metabolic items are included, fast for 8 to 12 hours (water is fine)
Book a morning draw when possible and drink plenty of water
Please bring a list of the supplements you take
We may suggest pausing non-prescribed high-dose biotin and non-essential supplements 24 to 48 hours before testing (the specialist will advise you)
Do not stop prescribed medications without your doctor's instruction
A short note of what you eat on a typical day and any dietary restrictions is helpful

Precautions and Safety

We avoid unnecessary high-dose supplementation and look at balance between nutrients, such as zinc and copper or vitamin D and calcium
Tell us if you are pregnant or breastfeeding, or have liver or kidney disease, kidney stones or G6PD deficiency
Results that need treatment, such as severe anemia or electrolyte problems, are managed with medical care and follow-up testing, not supplements alone
If you have emergency symptoms, emergency care comes before testing

How VEI Clinic Works

An internal medicine specialist decides on the test items after your consultation. We do not read a single number in isolation. We interpret results together with your symptoms, eating habits and medications.

Even with the same supplement plan, the body's response can vary from person to person, and the specialist decides after your consultation whether supplementation is needed and how.

FAQ

Frequently asked questions

Should I stop all supplements before testing?

Not necessarily. We will tell you which ones to pause briefly, such as biotin, and which ones you can continue. Do not stop prescribed medications without instruction.

Can you test minerals inside red blood cells?

Some items, such as red blood cell magnesium, are available. We explain the limits of the test first and always interpret it together with your symptoms.

Do you offer hair mineral testing?

We generally do not recommend it. It is easily affected by outside contamination and is hard to interpret for medical decisions.

When should I retest?

Usually around 8 to 12 weeks after changing your diet or supplements. It may be sooner or later depending on the item and your goals.