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Rating Newest Oldest. Best Answer: 8 to 10 hours is considered FASTING. You should be testing BEFORE each meal, and then again TWO HOUR after each meal. If you are under control, the FASTING reading (first thing in the morning, before breakfast) should be low-normal, like 80-100.
You will have to consult your physician for the exact fasting period for blood work. The time frame can range anywhere from 9 to 12 hours before the blood test. Â» One of the fasting requirements for blood work is that you make a note of what you have been consuming for about a week prior to your blood work. Â» It is advisable to avoid red meat, eggs and any food with high cholesterol in it.