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Doctor insights on: How Long Before My Glucose Tolerance Test Should I Be Drinking The Glucose

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How long before my glucose tolerance test should I be drinking the glucose?

How long before my glucose tolerance test should I be drinking the glucose?

Depends: It depends. If you are having the initial 1 hour glucose challenge test performed at 24-28 weeks, you will have bloodwork drawn one hour after drinking the glucola. If you failed the 1 hour sugar test, a 3 hour sugar test would be performed and blood would be drawn before you drink the glucola and at 1, 2 and 3 hours later. ...Read more

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Tolerance (Definition)

When one takes a drug, such as heroin or alcohol, repeatedly, 'tolerance' develops because more of the drug is needed to give the same effect on the body/brain; e.g. Liver enzymes r stimulated to metabolize the drug faster and faster. There may be a strong genetic predisposition to addiction, some studies suggesting that 1 of 10 people will become dependent on alcohol or some ...Read more


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How many hours should i be fasting before sugar blood test of pregnancy?

How many hours should i be fasting before sugar blood test of pregnancy?

Ask your OB MD: It may depend upon whether you are having a FBS(fasting blood sugar) & 2 hour post prandial(after eating) or full several hour Glucose Tolerance test(GTT) give your OB MD a call and find out. ...Read more

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How many hours should I be fastng for the blood sugar test ?

How many hours should I be fastng for the blood sugar test ?

Depends on the test.: If you are checking fasting blood glucose, you should ideally fast for 6 hours. If you are getting a glycated hemoglobin (hba1c), fasting or non-fasting state des not affect the test since the test is a indirect calculation of the average blood glucose for 90 days by measuring carbohydrate molecules attached to the red blood cells, which cycles within our body on the average of every 90 days. ...Read more

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How do you explain normal glucose after a meal but high glucose after fasting and before eating in the morning?

How do you explain normal glucose after a meal but high glucose after fasting and before eating in the morning?

Good question: High morning glucose may be a "dawn phenomenon" or "somogyi effect." they are both rebound hyperglycemia in response to low glucose levels at night. The first is from natural insulin, the second man-made. Depending on the morning level, your doc may ask you to check you glucose at 2-3 am for a few nights. Treatment depends on the cause. Good luck and check with your physician for help. ...Read more

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I've got a glucose blood test tomorrow morning and have to fast 10 hours before and was wondering whether you can drink water?

Yes: Water is fine; nobody wants you to be dehydrated just for some blood tests, but they don't want you to take any food or other fluids which may elevate your blood sugar. ...Read more

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Blood glucose level reaches 200 three hours after eating dinner. Then insulin. How long should I wait to see the lowest possible near normal score?

Blood glucose level reaches 200 three hours after eating dinner. Then insulin. How long should I wait to see the lowest possible near normal score?

Blood sugar: Rapid acting insulin lasts from 4-6 hours and reaches peak effect in 2-3 hours at which time your blood sugar would be at its lowest as a general rule. However if you had taken a long-lasting insulin earlier in the day, it would also be exerting an effect hours later. Your physician who knows your case best is also best qualified to answer your question. ...Read more

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What can I do if my fasting sugar is 106 and 2 hours later after a meal 110. Is this pre diabetes?

What can I do if my fasting sugar is 106 and 2 hours later after a meal 110. Is this pre diabetes?

Technically the: Fasting (if a lab sugar) is in the prediabetes range, but not the post meal. However, why are you worried about that it's called. It's all a progression from obesity -> Insulin resistance -> pre diabetes -> true diabetes. Why wait for the name to change. Start to protect yourself now with education, diet, exercise, weight loss and prevention. Don't wait until after the fact. ...Read more

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What to do if i had a random glucose test ->77 mg/dl, after working out . My glucose rises to 165 after eating pasta.?

Could be normal: Hi. If you're worried about diabetes risk, get tested. It's easy: fasting serum glucose, random serum glucose, A1c, or oral glucose tolerance test; each has its own diagnostic criteria. In the meantime, of course eat healthily and exercise regularly for life. Good luck! ...Read more

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I'm 28 weeks and getting a glucose test done today are are you supposed to fast before the one hour test? And if so for how long?

I'm 28 weeks and getting a glucose test done today are are you supposed to fast before the one hour test? And if so for how long?

Please call YOU OB N: Now and ask them , they should have told u what to do when they scheduled the test !please call them now and follow their advice since they are your doctor. ...Read more

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My glucose tolerance test result was 10.8. What should I be doing.

Probably diabetic: A level of 10.8 during the test is just below diagnostic for diabetes. You should do a hba1c, but you have, at the least, impaired glucose tolerance. You should be following a low concentrated sweets diet. If overweight, you need to lose weight. Exercise. You may also need medication based on other lab results. ...Read more

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Can you guys tell me how bad will it change my blood sugar level if i was 2 hours longer in the fasting procedure?

Can you guys tell me how bad will it change my blood sugar level if i was 2 hours longer in the fasting procedure?

Since I don't: Understand your question it's hard to answer. If you were fasting and had fasted two hours longer, it probably wouldn't have made a significant difference in your blood sugar -- provided you're talking about a fast of over 6 or more hours. Your body has mechanisms to keep your sugar normal unless you have diabetes or other significant problem. ...Read more

Blood Sugar (Definition)

The blood sugar concentration or blood glucose level is the amount of glucose (sugar) present in the blood of a human or animal. The body naturally tightly regulates blood glucose levels as a part of metabolic homeostasis. Glucose is the primary source of energy for the body's cells, and blood lipids (in the form of fats and oils) are primarily ...Read more


Dr. Cayce Jehaimi
2,612 doctors shared insights

Glucose (Definition)

Glucose is the basic sugar molecule and the source of energy throughout the living kingdom. We are programmed to easily detect it by taste in our foods as it is desirable but can be overdone with the modern diet. It gets out of control ...Read more