Devlabwerks - Fasting before certain blood tests is important to help make sure that your test results are accurate. Even having black coffee before the test can significantly impact results. However, at
I was fasting overnight for a blood test but then had one cup of coffee with sugar. How long must I wait before I do the blood test? - Quora
![Why Is Fasting Required Before a Test? | Medical Arts Laboratory - Florida Blood Lab | Blood Draw & Test Why Is Fasting Required Before a Test? | Medical Arts Laboratory - Florida Blood Lab | Blood Draw & Test](https://medartslab.com/wp-content/uploads/2019/09/MedArts-Fasting.jpg)