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Don't do these things before medical tests — they can ruin your results

Tue, March 17, 2026 - 17:31
2 min
Don’t ignore these simple rules to get the most out of your doctor’s visit
Don't do these things before medical tests — they can ruin your results Don’t do these things before a doctor’s visit (photo: Freepik)

A doctor’s check-up is an important procedure for monitoring your health. But even small mistakes before your visit can affect test results and the overall assessment of your body’s condition.

VeryWell Health explains what not to do before a check-up and lab tests.

Forgot your documents — wasted time

Before a check-up, make sure to bring your passport or ID, health insurance, previous test results, and a list of your illnesses and doctors. This helps avoid unnecessary delays.

Food before tests

If your doctor ordered fasting blood tests, don’t eat or drink anything except water for 8–12 hours before your visit. Food, coffee, or alcohol can distort your blood sugar, cholesterol, and blood pressure readings.

Smoking and exercise can affect results

Avoid smoking 10–12 hours before your check-up — it can impact cholesterol levels and inflammation. Intense workouts the day before tests are also not recommended, as they can change results and cause dehydration.

Don’t ignore symptoms

Before your visit, write down any new symptoms or changes in how you feel. This helps your doctor assess your condition more accurately and not miss important details.

Don’t forget your medications

Tell your doctor about all medications you take, from prescriptions to vitamins and supplements. This helps avoid dangerous interactions.

Even small details, like drinking enough water or scheduling tests at the right time, can significantly influence your results.

This material is for informational purposes only and should not be used for medical diagnosis or self-treatment. Our goal is to provide readers with accurate information about symptoms, causes, and methods of detecting diseases. RBС-Ukraine is not responsible for any diagnoses that readers may make based on materials from the resource. We do not recommend self-treatment and advise consulting a doctor in case of any health concerns.

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