www.webmd.com/cholesterol-management/fasting-blood-tests

You might want to bring a snack and a drink with you so you can eat as soon as possible after the test.

www.medicalnewstoday.com/articles/319080.php

Aug 23, 2017 ... Understanding when and how to fast before a blood test can help to .... As such, people should not drink coffee before a fasting blood test.

www.healthline.com/health/fasting-before-blood-test

Coffee is also a diuretic, which means that it will increase how much you pee. This can have a dehydrating effect. The less hydrated you ...

www.questdiagnostics.com/home/patients/preparing-for-test/fasting.html

With certain blood tests, you may be instructed to fast for up to eight hours before your appointment. Fasting before a blood draw means you don't eat or drink ...

www.health.harvard.edu/staying-healthy/ask-the-doctor-what-blood-tests-require-fasting

Nov 13, 2014 ... Q. Sometimes my doctor tells me it's okay to eat before a blood test, and ... When fasting for blood tests, you may still drink water, plain coffee, ...

medlineplus.gov/lab-tests/fasting-for-a-blood-test

Jan 16, 2019 ... Fasting before a blood test can help ensure the accuracy of certain ... Juice, coffee, soda, and other beverages can get in your bloodstream and ...

www.everydayhealth.com/cholesterol-specialist/coffee-before-cholesterol-testing.aspx

Apr 26, 2010 ... I had a few cups of black coffee (no cream or sugar) before a cholesterol test. Will it affect the results, and if so, how? Can I have any liquids ...

www.livestrong.com/article/494151-fasting-blood-tests-black-coffee

Depending on the type of blood work, typical laboratory protocols can upset ... In most cases, you will have to suspend your indulgence in food, coffee, tea, ... before the cutoff time to ensure adequate blood glucose for energy while you fast.

www.stmichaelshospital.com/programs/labs/fasting.php

If your doctor orders a fasting blood test, you should not have anything to eat or drink for 12 hours before you go to the laboratory to have your blood taken. Some examples of fasting blood ... Can I drink coffee or tea? No. Can I chew gum? No.