Does this test have other names?Glucose, postprandial; glucose, 2-hour postprandial; 2-hour PPG; 2-hour postprandial blood sugar Show
What is this test?This is a blood test to check for diabetes. If you have diabetes, your body doesn't make enough insulin to keep your blood sugar in check. This means your blood sugar levels are too high, and over time this can lead to serious health problems including heart, nerve, kidney, and eye damage. Postprandial means after a meal. This test is done to see how your body responds to sugar and starch after you eat a meal. As you digest the food in your stomach, blood glucose, or blood sugar, levels rise sharply. In response, your pancreas releases insulin to help move these sugars from the blood into the cells of muscles and other tissues to be used for fuel. Within 2 hours of eating, your insulin and blood glucose levels should return to normal. If your blood glucose levels remain high, you may have diabetes. Why do I need this test?You may need this test if your healthcare provider wants to see if you have diabetes or another insulin-related disorder, especially if you have symptoms such as:
If you're pregnant, you may have this test to screen for gestational diabetes. This is diabetes that can develop during pregnancy. Treating gestational diabetes reduces the risk for health problems for you and your baby. What other tests might I have with this test?Your healthcare provider may order other tests to confirm or evaluate whether you have diabetes. These may include:
What do my test results mean?Test results may vary depending on your age, gender, health history, and other things. Your test results may be different depending on the lab used. They may not mean you have a problem. Ask your healthcare provider what your test results mean for you. Test results vary by age and are usually measured in milligrams per deciliter (mg/dL). Normal results for the 2-hour postprandial test based on age are:
If your blood glucose level is still high 2 hours after you've eaten, or if it is high 1 hour after a gestational diabetes glucose tolerance test, it could mean you have diabetes. How is this test done?The test is done with a blood sample. A needle is used to draw blood from a vein in your arm or hand. Does this test pose any risks?Having a blood test with a needle carries some risks. These include bleeding, infection, bruising, and feeling lightheaded. When the needle pricks your arm or hand, you may feel a slight sting or pain. Afterward, the site may be sore. What might affect my test results?Your test results might be affected if you:
How do I get ready for this test?You must fast for 12 hours before the test and then eat a meal with at least 75 grams of carbohydrates. After the meal, don't eat anything else before having the test. Plan to rest during the 2-hour waiting period, because exercise can cause blood sugar levels to rise. You may not have to fast if you're pregnant. Be sure your healthcare provider knows about all medicines, herbs, vitamins, and supplements you are taking. This includes medicines that don't need a prescription and any illegal drugs you may use. When you have diabetes, your blood sugar (aka blood glucose) levels may be consistently high. Over time, this can damage your body and lead to many other problems. How much sugar in the blood is too much? And why is high glucose so bad for you? Here’s a look at how your levels affect your health. They're less than 100 mg/dL after not eating (fasting)
for at least 8 hours. And they're less than 140 mg/dL 2 hours after eating. During the day, levels tend to be at their lowest just before meals. For most people without diabetes, blood sugar levels before meals hover around 70 to 80 mg/dL. For some people, 60 is normal; for others, 90. What's a low sugar level? It varies widely, too. Many people's glucose won't ever fall below 60, even with prolonged fasting. When you diet or fast, the liver keeps your levels normal by turning fat
and muscle into sugar. A few people's levels may fall somewhat lower. Doctors use these tests to find out if you have diabetes: Any sugar levels higher than normal are unhealthy. Levels that are higher than normal, but not reaching the point of full-blown diabetes, are called prediabetes. According to the
American Diabetes Association, 86 million people in the U.S. have this condition, which can lead to diabetes if you don't make healthy lifestyle changes that your doctor recommends. It also raises the risk for heart disease, although not as much as diabetes does. It's possible to keep prediabetes from becoming diabetes with diet and exercise. Sugar and Your BodyWhy are high blood sugar levels bad for you? Glucose is precious fuel for all the cells in your body when it's present at normal levels. But it can behave like a slow-acting poison.
Almost any part of your body can be harmed by too much sugar. Damaged blood vessels cause problems such as:
Keep your blood sugar levels close to normal to avoid many of these complications. The American Diabetes Association's goals for blood sugar control in people with diabetes are 70 to 130 mg/dL before meals, and less than 180 mg/dL after meals. |
Normal sugar levels 2 hours after eating
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