For about three days before the test, you can eat about 150 grams or 10 servings of carbohydrates. These should be taken over the whole day.
One serving of carbohydrate
- One slice of bread = Half a large bread roll or muffin
- One-fourth Lebanese bread
- One apple = One orange = One small banana
- Medium mandarin = Two peach = Three apricots = Three prunes
- Two Weetabix
- One-fourth cup muesli = One-third cup Just Right = Half cup bran flakes (most people would have two to three servings of cereal for a meal)
- Three-fourth cup cornflakes (most people would have two servings of cornflakes for a meal, that is, a bowlful is about one and a half cups)
- Two biscuits (milk coffee, shredded wheat, and full-o-fruit)
- One cup milk
- One 200-gram carton of yogurt
- Half cup cooked pasta (most people would have 1 to 1.5 cups of pasta for a meal, which would be two to three servings)
- One-third cup cooked rice (most people would have two-thirds to one cup of rice for a meal which would be two to three servings)
- One medium potato
- One small corn cob
You can consume some extra fruit juice or biscuits instead of bread and cereals. Include meat, fish, eggs, cheese, butter, and margarine during these three days.
Do not eat or drink anything after 10 on the night before the test. Refrain from smoking after 9 the night before the test.
What is an oral glucose tolerance test?
An oral glucose tolerance test (OGTT) measures the body’s response to glucose from foods. OGTT can identify if you have or are at risk of diabetes. Doctors may use a shorter version of OGTT to check for diabetes during pregnancy.
OGTT is recommended if you have the following conditions:
- Overweight or obesity
- Family history of diabetes
- High blood pressure
- High triglycerides (a type of fat in your blood)
- Polycystic ovary syndrome leads to menstrual problems
- Delivered a baby who weighed more than nine pounds
- Gestational diabetes during a past pregnancy
A shorter version of OGTT may be performed between the 24th and 28th week of pregnancy to identify gestational diabetes.
How is an oral glucose tolerance test performed?
You will fast for 8 to 10 hours before the test starts.
The test procedure is performed in the following manner:
- The nurse collects an initial baseline blood sample.
- You will be given a glucose drink with 75 grams of glucose, which should be consumed within five minutes.
- Further blood samples are collected every 60 minutes.
- Your blood glucose level will be tested one, two, and three hours after drinking the solution.
- Once the test ends, you should have something to eat and drink (it is best to take it with you).
Are there side effects of the oral glucose tolerance test?
The oral glucose tolerance test does not cause any serious side effects. Some people may have side effects from sugary drinks or blood tests.
Side effects due to sugary drinks may include:
Side effects of blood tests may include:
Health Solutions From Our Sponsors
Top What Should I Eat the Day Before My Glucose Test Related Articles
Body Blood Sugar LevelsHigh blood sugar can be a sign of diabetes or prediabetes. The drugs that treat it sometimes cause low blood sugar too. WebMD helps guide you through the effects of both.
Diabetes (Type 1 and Type 2)Diabetes is a chronic condition characterized by high levels of sugar (glucose) in the blood. The two types of diabetes are referred to as type 1 (insulin dependent) and type 2 (non-insulin dependent). Symptoms of diabetes include increased urine output, thirst, hunger, and fatigue. Treatment of diabetes depends on the type.
Diabetes QuizTake the Diabetes Quiz and learn the causes, signs, symptoms, and types of this growing epidemic. What does diabetes have to do with obesity and diet? Learn about life as a diabetic.
Diabetes Symptoms in MenEarly symptoms of diabetes are different in men, such as low testosterone. In many cases, prediabetes that will progress to type 2 diabetes if it is not treated early.
Diabetes Symptoms in WomenDiabetes symptoms in women include vaginal itching, pain, or discharge, loss of interest or pain after having sex, polycystic ovarian syndrome (POS), and urinary tract infections or UTIs (which are more common in women. Symptoms of diabetes that are the same in women and men are excessive thirst and hunger, bad breath, and skin infections, darkening of skin in areas of body creases (acanthosis nigricans), breath odor that is fruity, sweet, or acetone, and tingling or numbness in the hands or feet, blurred vision, fatigue, tingling or numbness in the hands or feet, wounds that heal slowly, irritability, and weight loss or gain.
Complications of type 1 and type 2 diabetes are the same, for example, skin, eye, and circulation problems, low blood sugar (hypoglycemia), high blood sugar (hyperglycemia), ketoacidosis, and amputation. If diabetes is not managed a person may not survive.
Type 2 Diabetes Diet PlanA type 2 diabetes diet or a type 2 diabetic diet is important for blood sugar (glucose) control in people with diabetes to prevent complications of diabetes. There are a variety of type 2 diabetes diet eating plans such as the Mediterranean diet, Paleo diet, ADA Diabetes Diet, and vegetarian diets.Learn about low and high glycemic index foods, what foods to eat, and what foods to avoid if you have type 2 diabetes.
Glucose Tolerance TestThe oral glucose tolerance test (OGTT), or glucose tolerance test is a blood test used (not routinely however) to diagnose diabetes, and gestational diabetes. Information in regard to reliability of the oral glucose tolerance test is important, as some conditions (common cold), or food (caffeine), or lifestyle habits (smoking) may alter the results of the oral glucose tolerance test.
Insulin Pump for DiabetesAn insulin pump is designed to deliver insulin directly to a patient with diabetes. They are about the size of a standard beeper. The pump is attached to under the skin (usually on the abdomen). The amount of insulin required will depend on lifestyle (exercise, sleep patterns, activity level, and diet).
Is a Glucose Level of 101 Bad?It means that you should control your blood sugar level through your diet. Otherwise, you may develop diabetes. This is a warning sign that you should stop ingesting extra glucose through your diet.
Diabetes: What Raises and Lowers Your Blood Sugar Level?Want to lower your blood sugar? Learn to better control your glucose levels by preventing blood sugar spikes and swings to avoid neuropathy and other diabetes complications. Find foods that lower blood sugar, and identify foods and activities that raise high blood sugar risks.
Type 1 DiabetesWhat is type 1 diabetes? There are new treatments for juvenile diabetes, and more people with diabetes can be treated than ever before. Learn the symptoms of T1D, the causes, and find ways to control your blood glucose levels naturally.
Type 1 Diabetes QuizWhat are the causes of type 1 diabetes? Take this quiz and challenge your knowledge of causes, symptoms, diagnosis and treatments for this common condition, formerly known as juvenile diabetes.
Type 1 vs. Type 2 Diabetes: Differences
Diabetes mellitus is a metabolic condition in which a person's blood sugar (glucose) levels are too high. Over 29.1 million children and adults in the US have diabetes. Of that, 8.1 million people have diabetes and don't even know it. Type 1 diabetes (insulin-dependent, juvenile) is caused by a problem with insulin production by the pancreas. Type 2 diabetes (non-insulin dependent) is caused by:
Eating a lot of foods and drinking beverages with simple carbohydrates (pizza, white breads, pastas, cereals, pastries, etc.) and simple sugars (donuts, candy, etc.)
- Consuming too many products with artificial sweeteners (We found out that they are bad for us!)
- Lack of activity
While the signs and symptoms of both types of diabetes are the same, which include:
- Increased urination
- Increased hunger
- Increased thirst
- Unexplained weight loss.
However, the treatments are different. Type 1 diabetes is insulin dependent, which means a person with this type of diabetes requires treatment with insulin. People with type 2 diabetes require medication, lifestyle changes like eating a healthy diet, and getting regular exercise.
Type 2 DiabetesType 2 diabetes is a chronic condition that may be reversible with diet and lifestyle changes. Symptoms include excessive thirst, frequent urination, weight loss, fatigue, and an unusual odor to your urine. Most people don't know they have type 2 diabetes until they have a routine blood test. Treatment options include medications, a type 2 diabetes diet, and other lifestyle changes.
Type 2 Diabetes QuizWhat causes type 2 diabetes? Can it be prevented? Take this online quiz and challenge your knowledge of this common condition. Also, get the truth about myths and facts!
Type 2 Diabetes SignsLearn about type 2 diabetes warning signs, symptoms, diagnosis, and treatment options. Find out why thirst, headaches, and infections could be signs of diabetes. Discover the treatment options for people with type 2 diabetes, including medicines and lifestyle improvements.
Diabetes Urine TestsUrine tests for individuals with diabetes is important to check for diabetes-related kidney disease and severe hypoglycemia. With proper monitoring of blood glucose levels, diabetic-kidney disease can be avoided.