What do you drink for glucose test?
For the three-hour test: You will be asked to come to the test fasting — not having had anything to eat or drink for the previous eight hours. A fasting blood sugar will be obtained. You'll drink about 8 ounces (237 milliliters) of a glucose solution containing 3.5 ounces (100 grams) of sugar.
DO NOT eat or drink anything (other than sips of water) for 8 to 14 hours before your test. (You also cannot eat during the test.) You will be asked to drink a liquid that contains glucose (75 g). You will have blood drawn before you drink the liquid, and again 2 more times every 60 minutes after you drink it.
- Results of the glucose challenge test are given in milligrams per deciliter (mg/dL) or millimoles per liter (mmol/L). A blood sugar level below 140 mg/dL (7.8 mmol/L) is considered normal. A blood sugar level of 140 mg/dL (7.8 mmol/L) or higher might indicate gestational diabetes.
- Generally you're required to fast, consuming no food or liquids other than water, for nine to 12 hours before the test. Some cholesterol tests don't require fasting, so follow the instructions provided by your doctor.
- Causes. During pregnancy, the placenta makes hormones that can lead to a buildup of glucose in your blood. Usually, your pancreas can make enough insulin to handle that. If not, your blood sugar levels will rise and can cause gestational diabetes.
For a fasting blood glucose test, you can't eat or drink anything but water for eight hours before your test. You may want to schedule a fasting glucose test first thing in the morning so you don't have to fast during the day. You may eat and drink before a random glucose test.
- You can drink water, coffee and other non-caloric beverages during the fast, and this can help reduce hunger levels. It is very important to eat mostly healthy foods during your eating window. This won't work if you eat lots of junk food or excessive amounts of calories.
- A. For decades, we've told people not to eat or drink (except for water) for eight to 12 hours before a cholesterol test. This was based on the belief that fasting provides a more accurate assessment of all the lipids (fats) in the blood, which include cholesterol and triglycerides, a type of fat-carrying particle.
- It is still commonly used during pregnancy for diagnosing gestational diabetes. With an oral glucose tolerance test, the person fasts overnight (at least 8 hours, but not more than 16 hours). The next morning, the fasting plasma glucose is tested.
It is still commonly used during pregnancy for diagnosing gestational diabetes. With an oral glucose tolerance test, the person fasts overnight (at least 8 hours, but not more than 16 hours). The next morning, the fasting plasma glucose is tested.
- If your blood glucose from the first step is too high, you will need to come back for a 3-hour glucose tolerance test. For this test: DO NOT eat or drink anything (other than sips of water) for 8 to 14 hours before your test. (You also cannot eat during the test.)
- With certain blood tests, you may be instructed to fast for up to eight hours before your appointment. Fasting before a blood draw means you don't eat or drink anything except water. Don't wait until the day of your blood draw to ask if you should fast.
- This glucose test is done to evaluate how your body is processing sugar and determine if you have developed Gestational Diabetes. The test requires a total of 4 blood draws. The first blood test is done fasting, which means nothing to eat or drink (except water) for at least 8-12 hours prior to the initial blood draw.
Updated: 16th October 2019