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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.
IF is not a diet, it's more of a dieting pattern. In the most basic way I can put it, you are choosing to fast during certain times and eat in smaller windows. Fasting for 16 hours of the day and eating during the other 8. A popular schedule is skipping breakfast and eating from around 1-9pm everyday. Simply taking a 24-hour period away from food.