Fasting
10-12 hours prior to the test
Prohibited:
- All food and drinks (except water)
- Alcohol
- Fruit juices
- Chewing gum and candies
- Any kind of sweetener
Preparation
- The night before: Light, low-fat dinner (e.g. salad, low-fat yogurt, toast)
- Hydration: Drink plenty of water the day before – it does not affect test results
- Smoking: Avoid smoking for at least 2 hours prior to the test
Important note: If you are taking any medication, inform your doctor or the laboratory, as some medications may affect the test results.