Can You Drink Water And Coffee Before A Fasting Blood Test

While fasting you can still drink water and unsweetened coffee and tea because these do not affect blood sugar.

Can you drink water and coffee before a fasting blood test. You may also be told not to smoke before your test. If you need to fast from water as well make sure. When the phlebotomist draws you blood the more water you drink the easier it is for him to locate your veins.

And if urine tests are ordered along with blood tests it will be easier for you to provide a sample. By DrMegan Ralf April 10 2018. Common fasting blood tests.

If your appointment is at 8 am. Fasting before blood tests. You should not eat for eight hours before having your blood glucose measured to check for diabetes or to see how well treatments are working.

For tests which require pre-test fasting coffee will affect your blood your metabolism and your blood test results. A comprehensive test such as a metabolic panel uses one blood sample for a variety of assays -- some of which require fasting 1. But drinking diet sodas with artificial sweetener before a blood test can affect your results.

As such people should not drink coffee before a fasting blood test 9 Guidelines on common blood tests It depends to some extent on what test is being performed but for many that require fasting intake of non-carbohydrate containing liquids a few hours before blood work will not impact results. Drinking coffee before blood tests is not recommended but drinking a good amount of water is advised as this helps make veins more visible therefore making the blood extraction easier. The process of fasting ensures that the results of your blood test will not be confused by foods that you have eaten during the last few hours that your body has not fully absorbed.

Its recommended that you avoid coffee and other liquids during your fast McKnight said. Hot drinks such as tea and coffee are also part of a group known as diuretics which means that it will increase the need to pass water. Commonly it is done for 9 to 12 hours before the test is performed according to the doctors advice.