A nonfasting glucose test—a blood test used to measure the glucose (sugar) in your blood after eating—is considered normal if it is below 140 milligrams per deciliters of blood (mg/dL). If it is between 140 and 199 mg/dL, you may have prediabetes. If above 200 mg/dL, you may have diabetes. Show
Measuring glucose levels after meals is important not just for diagnosis, but in the treatment of diabetes too. Results can reveal whether you need an insulin shot to move excess sugar out of your blood and into cells for energy. This article explains the purpose of a nonfasting glucose test and how it differs from a fasting glucose test. It also describes what a normal result is for each test and at what point a person may need medical assistance for hypoglycemia (high blood glucose) or hyperglycemia (low blood glucose). Verywell / Theresa Chiechi What Is Blood Glucose?Blood glucose comes from food. As you eat, food is broken down into sugar and sent to the blood. The insulin is what helps the sugar go into the cells. Once this happens, the sugar is either used for energy or stored away. Glucose is known as the body’s main energy source. Too much glucose in the blood, or if it is not absorbed properly, can create both short- and long-term health issues. To keep a healthy blood sugar level, it's important to:
Nonfasting vs. Fasting Glucose LevelsFasting blood sugar is a test that measures blood sugar and is used to determine if an individual has diabetes. When a person takes this test, they cannot eat or drink for at least eight hours prior to the test. The results determine whether a person is prediabetic or diabetic. The results are measured in milligrams per deciliter, or mg/dL. The following results indicate whether a person is prediabetic or diabetic:
To test nonfasting blood sugar, an A1C test is administered to determine the average blood sugar level of an individual over a period of two to three months. The following results indicate whether a person is prediabetic or diabetic:
Normal Nonfasting Glucose LevelsBlood sugar levels among people with type 1 diabetes should be:
Blood sugar levels among people with type 2 diabetes should be:
Blood Sugar Levels for Children and BabiesThese are the normal blood glucose levels for children:
Hypoglycemia and Low Nonfasting Blood GlucoseHypoglycemia is a glucose level below 70 mg/dL. If the body doesn’t have enough glucose, this can lead to symptoms such as:
If a person has diabetes, hypoglycemia can sometimes be a side effect of diabetes medication. If a person has hypoglycemia and the glucose is too low, it could result in a diabetic coma. If the person is unconscious, it is vital to call 911 immediately. Anyone with diabetes should keep the contact information of their healthcare provider nearby so they can reach out for help when needed. When to Seek Emergency HelpCall 911 if your blood sugar falls below 70 mg/dL or if you feel tired or dizzy. Hyperglycemia and High Nonfasting Glucose LevelsHyperglycemia is high blood sugar. This happens when the body doesn’t have enough insulin and there is too much sugar in the blood. Symptoms of hyperglycemia include:
If hyperglycemia is not treated properly, you risk both short- and long-term health issues, such as kidney problems. And if your blood sugar climbs too high and is left untreated, you risk lapsing into a diabetic coma. Hyperglycemia can be maintained and/or prevented by:
It's important to work with your healthcare provider to get the best outcome regarding this condition. Risk of KetoacidosisDiabetic ketoacidosis (DKA) can develop in people who have type 1 diabetes and untreated hyperglycemia. This is when toxic acids or ketones build up in the blood. This is an extremely serious condition that can cause coma or death. SummaryDiabetes is a serious condition that requires diabetics to remain proactive about their blood glucose (blood sugar) levels. If they don't, they could develop hypoglycemia (low blood sugar), hyperglycemia (high blood sugar), or ketoacidosis (a serious complication of diabetes). Maintaining a healthy diet and exercising regularly can help keep blood sugar levels under control. A Word From VerywellDiabetes can create a lot of health complications if it's not managed properly. Checking blood sugar on a regular basis is essential. For many people, it also represents one of the biggest adjustments they have to make to a diabetic lifestyle. But if diabetes goes untreated, it can result in dangerous consequences. Frequently Asked Questions
By Yvelette
Stines Thanks for your feedback! What should blood sugar be 3 hours after eating?Here are the normal blood sugar ranges for a person without diabetes according to the American Diabetes Association: Fasting blood sugar (in the morning, before eating): Less than 100 mg/dL. 1-2 hours after a meal: Less than 140 mg/dL. 2-3 hours after eating: Less than 100 mg/dL.
What should blood sugars be 4 hours after eating?If you're generally healthy or are properly managing your diabetes, your blood glucose should fall between 90 and 130 milligrams per deciliter four hours after eating. If you do not have diabetes, your sugar could even go as high as 140 milligrams per deciliter after meals.
Is 124 high for a glucose reading?Less than 100 mg/dL = normal. Between 110–125 mg/dL = impaired fasting glucose (i.e., prediabetes) Greater than 126 mg/dL on two or more samples = diabetes.
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