Normally, your blood glucose levels increase slightly after you eat. This increase causes your pancreas to release insulin so that your blood glucose levels do not get too high. Blood glucose levels that remain high over time can damage your eyes, kidneys, nerves, and blood vessels.
There are several different types of blood glucose tests.
Fasting blood sugar (FBS) measures blood glucose after you have not eaten for at least 8 hours. It is often the first test done to check for prediabetes and diabetes.
A normal fasting (no food for eight hours) blood sugar level is between 70 and 99 mg/dL A normal blood sugar level two hours after eating is less than 140 mg/dL
Conversion of Glucose Values from mmol/l to mg/dl
mmol/l x 18 = mg/dl
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