Do I need to fast before my blood test?
Some blood tests need fasting for accurate results, while many don't require it at all. Your booking shows the requirement for each specific test, so always check there first rather than guessing.
Tests that often require fasting
- Fasting blood glucose.
- Lipid profile (cholesterol and triglycerides).
- Some metabolic panels.
How to fast correctly
- Avoid food and sugary or milky drinks for the time specified (commonly 8–12 hours).
- Plain water is usually fine and keeps you hydrated for an easier blood draw.
- Schedule a morning slot so most of your fast happens overnight while you sleep.
- Take regular medicines only as your doctor advises — ask if you're unsure.
Don't fast unnecessarily
Many tests (such as a CBC) need no fasting at all, so fasting when it isn't required just makes your morning harder for no benefit. On the other hand, eating before a test that does require fasting can give a falsely high result and mean repeating the test. Follow the specific instruction shown for your test, and if in doubt confirm with the lab or your doctor before your appointment.
