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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.
However, there are some blood test results that were inaccurate brought by coffee and tea. Therefore, it is advisable to avoid them when you are fasting for blood work. Yes, you can drink water, but you should avoid other things like gum or cigarettes. It is also not advisable to have an exercise.