Feb 16, 2022 · Q: Can you drink water before a fasting blood test? A: Yes. You can drink as much water as you want, but it should be plain. Avoid lemon-flavored and carbonated waters, as well as teas until …

Nov 20, 2024 · What Is Considered Fasting for Blood Work? Fasting for blood work means you don't eat or drink anything but water for 8-12 hours before you have a blood test. You also need to avoid …

Jul 3, 2025 · Yes—plain, unflavored water is not only allowed during a fasting blood test, it is encouraged. Sipping water keeps you hydrated, makes your veins easier to find, and does not …

Sep 18, 2025 · Fasting for blood work often requires not eating or drinking anything but water for 8-12 hours before the test to ensure accurate results.

Nov 20, 2025 · Fasting for eight to 12 hours before specific blood tests prevents nutrients from interfering with blood results and ensures test accuracy. Drinking water is the only exception, as this …

If your health care provider has told you to fast before a blood test, it means you should not eat or drink anything, except plain water, for several hours before your test.

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 anything except water.

Jun 9, 2023 · Fasting before blood work means you shouldn’t eat or drink anything except water for at least eight hours before a blood test. For some tests, you may need to fast for 12 hours. Ask your …

Oct 23, 2025 · When fasting for a blood test, you can and should drink plain water to stay hydrated. Water does not contain calories, sugars, or fats that could alter your results.

Apr 16, 2024 · Very few blood tests require a period of fasting before the test. They include tests for blood glucose and triglycerides. It is permitted to drink water, coffee, or black tea before the tests.