Does fasting for blood work include black coffee?

Can you drink coffee if you’re fasting before a blood test? Even if you drink it black, coffee can interfere with blood test results. That’s because it contains caffeine and soluble plant matter, which might skew your test results. Coffee is also a diuretic, which means that it will increase how much you pee.

Is CBC affected by fasting?

When your doctor orders a CBC, there are no special preparations you’ll need to take before the test. You are not required to fast (not eat solid foods for 12 hours or so), unless you are having other tests done at the same time that require it.

Can you drink black tea while fasting for blood test?

Fasting before blood tests? Yes, in most cases, you may drink black coffee before a “fasting” blood test (or black tea if that’s your preference). These beverages generally will not affect the results of common fasting lab tests, like cholesterol (lipid panel), metabolic panel or blood glucose.

Which blood tests require fasting?

Blood tests that you will likely need to fast for include: blood glucose test. liver function test. cholesterol test. triglyceride level test. high-density lipoprotein (HDL) level test. low-density lipoprotein (LDL) level test. basic metabolic panel.

Do you have to fast for CBC?

The different CBC blood test has a different time frame but the least time of all the blood test is 8 hours with only consuming water before the test while others may require an individual to fast for more than 12 hours.

How many hours for fasting blood work?

Fasting Blood Tests. There are three main tests that require fasting — glucose, cholesterol and iron. Cholesterol screenings require you to fast for at least 9 to 12 hours prior to blood work, with a 24-hour break from alcohol prior to testing.

How long should I fast before blood work?

Your doctor may recommend a certain time period for fasting; however, the standard amount of time is about eight to 12 hours of no food before having blood drawn. Schedule your blood test for early in the morning so you’ll only need to fast overnight to meet requirements. Fast for eight hours before a glucose test.