Published date: February 18, 2019 10:37 am
Blood glucose can also be measured in the "fasting" state, meaning that the person has not eaten or taken in any calories in the past 8 hours (usually this is done overnight and it is referred to as an overnight fast and is called a "fasting blood sugar" or FBS). In a person with normal insulin production and activity (a non-diabetic) blood sugar levels will return to "fasting" levels within 3 hours of eating. People with diabetes (type 1 and type 2) may not be able to get their blood glucose down this quickly after a meal or drinking a calorie-containing drink.
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