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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.
When do I fast? Catholics, as a group, are required to fast on only two days of the year - Ash Wednesday and Good Friday. On these days, fasting means something very specific and limited. It means that one eats only one full meal in a day, with no food in-between meals.