What is a healthy blood sugar level?

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Holly Anderson
Endocrinology Diabetes & Metabolism
If you don't have diabetes, a healthy blood sugar is less than 126, says Holly Anderson, Outpatient Diabetes Coordinator at Reston Hospital Center. Watch this video to find out the healthy level for someone with diabetes.
Thomas J. Hill, MD
Cardiology (Cardiovascular Disease)
A healthy blood sugar level, obtained in a fasting state, is less than 100. A fasting blood sugar of greater than 126 is diabetic. A fasting blood sugar between 100 and 126 is considered "prediabetic". Prediabetes can be associated with increased risk for heart disease and should lead to lifestyle changes.

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According to the American Diabetes Association, normal blood glucose ranges between 70 to 99 milligrams per deciliter (mg/dL).
Emilia Klapp
Nutrition & Dietetics
In a person without diabetes, the body keeps its blood-glucose level between meals in a range of about 70 to 99 milligrams per deciliter (mg/dL). This level will rise after eating, depending on the type and amount of food consumed, but it will not exceed 139 mg/dL. It also quickly returns to the between-meal range.
Khurram Nasir, MD
Cardiology (Cardiovascular Disease)
After you have fasted overnight or for an eight-hour period, your doctor can measure your blood glucose levels with a basic blood test. Blood sugar levels of under 100 are considered normal after an eight-hour fast. However, fasting blood glucose levels between 100-125 mg/dl could signal prediabetes.
A healthy blood sugar level is between 70 and 130 milligrams per deciliter (mg/dL) before meals and less than 180 mg/dL one to two hours after the start of a meal, according to the American Diabetes Association. Three tests are commonly used to measure blood sugar levels. A random plasma glucose test is a blood test that is done at any time of day. It may indicate you have diabetes if your blood glucose level is 200 mg/dL or higher. A fasting plasma glucose (FPG) test is often done first thing in the morning, after you have not eaten for at least eight hours. You may be diagnosed with prediabetes (at risk for diabetes) if your blood glucose level is 100 to 125 mg/dL on the FPG test, and you may have diabetes if your level is 126 mg/dL or higher.

The third test, called the oral glucose tolerance test, (OGTT) is also done after you have fasted for eight hours. You'll consume a glucose-containing beverage, and your blood will be taken two hours later. If your blood glucose level measures 200 mg/dL or higher on two different OGTTs, you may be diagnosed with diabetes. If it measures 140 to 199 on an OGTT, you may have prediabetes.
Dr. Mehmet Oz, MD
Cardiology (Cardiovascular Disease)

Having a high blood sugar level can mean you have diabetes. Watch as Dr. Oz explains what a healthy reading is in this video.


For people without diabetes, blood glucose levels rarely go over 120 mg/dl, even after eating a meal.

People with diabetes need to take action to lower their blood glucose either by injecting insulin or compensating with food or insulin at the next mealtime. You may hear that keeping your blood glucose below 130 mg/dl is the magic number. In fact, your target range may be a little higher or lower depending on several factors such as your age, capabilities, and life situation.

Continue Learning about Diabetes

Diabetes

Diabetes mellitus (MEL-ih-tus), often referred to as diabetes, is characterized by high blood glucose (sugar) levels that result from the body’s inability to produce enough insulin and/or effectively utilize the insulin. Diabetes ...

is a serious, life-long condition and the sixth leading cause of death in the United States. Diabetes is a disorder of metabolism (the body's way of digesting food and converting it into energy). There are three forms of diabetes. Type 1 diabetes is an autoimmune disease that accounts for five- to 10-percent of all diagnosed cases of diabetes. Type 2 diabetes may account for 90- to 95-percent of all diagnosed cases. The third type of diabetes occurs in pregnancy and is referred to as gestational diabetes. Left untreated, gestational diabetes can cause health issues for pregnant women and their babies. People with diabetes can take preventive steps to control this disease and decrease the risk of further complications.
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.