Not all blood tests require you to fast, but you should always follow your doctor’s instructions if you do need to fast for a specific exam. Blood tests are common procedures that healthcare providers ...

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 ...

Blood draws for several kinds of diagnostic tests require you to fast for several hours. Eating or drinking anything besides water can skew the results, leading to you needing to be retested. You may ...

Some common blood tests require you to fast beforehand to help make sure the test results are as accurate as possible. You can typically still drink water during this period, but is drinking tea ...