For accurate results, you may need to fast for certain tests. This requires you to avoid certain foods and drinks. Learn more ...

Drinking diet soda before a fasting blood test may alter results. Stick to water or unsweetened drinks as advised by your ...

You can consume nothing but water for at least 8 hours before a fasting glucose test. You may also need to follow a low carb diet and avoid exercise for some time before. A fasting glucose test ...

Most people with diabetes should test their blood sugar (or blood glucose) levels regularly. Knowing the results lets you adjust your strategy for keeping the disease in check. Research shows that in ...

This article was reviewed by Darragh O’Carroll, MD. Understanding Blood Tests: How They Work and What They Can Tell You Blood ...

It depends on the type of coffee you drank and the type of blood test you have scheduled. Black coffee typically does not affect tests that measure red blood cell count, liver function, or kidney ...