Fasting
You should fast for 10 to 12 hours before the examination.
Not allowed
- Any food or drinks except water
- Alcohol
- Fruit juices
- Chewing gum or sweets
- Any sweeteners
Preparation
- The evening before: Have a light, low-fat dinner, such as salad, low-fat yoghurt or a rusk
- Hydration: Drink plenty of water from the previous day - it does not affect the results
- Smoking: Avoid smoking for at least 2 hours before the examination
Important note: If you are taking any medication, please inform your doctor or the laboratory, as some medications may affect the results.