The Normal Range For Blood Sugar Levels

The Normal Range For Blood Sugar Levels

A blood glucose test measures the amount of a type of sugar, called glucose, in your blood. Glucose comes from carbohydrate foods. It is the main source of energy used by the body.

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

NICE recommended target blood glucose level ranges
Target Levels
by Type
Before meals
(pre prandial)
2 hours after meals
(post prandial)
Non-diabetic 72 to 106.3 mg/dL under 140.5 mg/dL
Type 2 diabetes 72 to 126.1 mg/dL under 153.1 mg/dL
Type 1 diabetes 72 to 126.1 mg/dL under 162.1 mg/dL
Children w/ type 1 diabetes 72 to 144.1 mg/dL under 180.2 mg/dL

Ref: Blood Sugar Level Ranges