Rules on How to Fast for Blood Work

By Alicia Bodine

Blood tests that check sugar or cholesterol levels must be performed only after a patient has fasted. Fasting allows a doctor to get an accurate blood result in order to make a diagnosis. If a patient doesn't follow fasting rules before a blood test, he will be asked to reschedule.

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Blood tests that check sugar or cholesterol levels must be performed only after a patient has fasted. Fasting allows a doctor to get an accurate blood result in order to make a diagnosis. If a patient doesn't follow fasting rules before a blood test, he will be asked to reschedule.

Make an appointment with your blood laboratory. Schedule a morning appointment if it is difficult for you to go without food for long periods.

Determine the time to begin your fast. Count back 12 hours from the appointment time. For example, if your appointment is 7 a.m., 12 hours earlier is 7 p.m. This is the time you must begin fasting for your blood test.

Drink only water after you begin the fast.

Consult your physician if you are taking medication.

Abstain from smoking, sucking on mints or chewing gum during your fast. You may resume these activities once your blood has been drawn.

Warning

Do not drink coffee until you complete the test.

References

About the Author

Alicia Bodine has been a professional writer for six years. She has produced thousands of articles for online publications such as Demand Studios, Bright Hub, Associated Content and WiseGeek. Bodine is also the current cooking guru for LifeTips. She has received awards for being a top content producer.

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