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Drink Water. Many people believe they should avoid water before a blood draw, but this couldnât be further from the truth. Drinking water will not only make you feel better if youâre fasting, it will also make for a smoother blood draw.
Quick Answer. Coffee is one of the specific items Mayo Clinic advises people to avoid while fasting before a cholesterol test. Typically, doctors ask people to fast for nine to 12 hours before a cholesterol test and drink nothing but water. Continue Reading.