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Doctor insights on: Glucose Tolerance Insulin

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Took two, 3 hour glucose tolerance /insulin tests, one test had low blood sugar AND second test had high insulin both in the 3rd hour. How to treat?

Took  two, 3 hour glucose tolerance /insulin tests, one test had low blood sugar AND second test had high insulin both in the 3rd hour. How to treat?

Ignore it: and don't do the testing again. The GTT is NOT a valid test for hypoglycemia, and insulin levels are generally unreliable and meaningless. You are probably overweight with insulin resistance. Eat less, exercise more, and lose weight. ...Read more

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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I am 25 year old.in glucose tolerance test 0 hr insulin-5.77,1hr-130,2hr-99.sgot-43,sgpt-90.is my liver totally damaged.can't it be reverted?

I am 25 year old.in glucose tolerance test 0 hr insulin-5.77,1hr-130,2hr-99.sgot-43,sgpt-90.is my liver totally damaged.can't it be reverted?

Not damaged: All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, your lab results are not that bad. However, you need to consult a Liver specialist as this issue is not suitable for this forum. Do not drink alcohol and do not take paracetamol or acetaminophen. ...Read more

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What are the normal values for serum insulin in glucose tolerance test (75g) after 60 and 120 minutes?

What are the normal values for serum insulin in glucose tolerance test (75g) after 60 and 120 minutes?

Serum insulin: levels are very unreliable and of almost no use in a GTT. The labs don't measure them accurately either. Insulin is supposed to increase during a GTT and will go up more if you are overweight and insulin resistant. There are so-called "normals" but they are inaccurate and worthless. ...Read more

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Suffering from pcos but glucose tolerance test 100 mg n fasting sugar tests are normal still can I take metforminam i insulin resistant still ?

Yes: Insulin resistance is the basic metabolic cause of pcos, and metformin is generally the best treatment for Insulin resistance and pcos. You want to emphasize diet, exercise and weight loss - plus metformin if indicated- so that you improve your weight and Insulin resistance before your blood sugar gets above normal. ...Read more

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Recently bloodwork for fasting insulin. How is this different that a glucose tolerance test or a fasting glucose test?

Recently bloodwork for fasting insulin. How is this different that a glucose tolerance test or a fasting glucose test?

Different tests: Insulin & glucose are 2 different ways to measure diabetes. Insulin is produced by pancreas to keep sugars under control. We measure glucose to see how well sugars are controlled. Think of glucose as speedometer & Insulin as tachometer (hgba1c is avg trip speed - ask a car nut if this doesn't make sense). Glucose tolerance test requires drinking sugar whereas other 2 tests don't. ...Read more

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I have pcos. My glucose tolerance test was perfect. My insulin level was so low it couldn't be found. I was told that's not good. Why is that bad?

I have pcos. My glucose tolerance test was perfect. My insulin level was so low it couldn't be found. I was told that's not good. Why is that bad?

It's not good: Or bad -- just a test that should have never been ordered since the test is meaningless in that situation and most labs can't do accurate Insulin levels to begin with. If you didn't have insulin, you would have lapsed into a coma from high glucose levels long ago. The diagnosis of pcos is not made by a GTT or Insulin levels. ...Read more

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I am prediabetic with higher blood sugar and insulin levels. L just had a 3 hour glucose tolerance test. Fasting sugar is 63, insulin is 2. Meaning?

I am prediabetic with higher blood sugar and insulin levels. L just had a 3 hour glucose tolerance test. Fasting sugar is 63, insulin is 2. Meaning?

Doesn't matter: The numbers aren't really important or valuable. If you're overweight and have high glucose (particularly with a positive family history) you need education, diet, exercise, weight reductio and maybe medication -- not just a diagnosis. The diagnosis doesn't help you get healthier. ...Read more

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I am a 38 year old woman with pcos with insulin resistance and impaired glucose tolerance in 2005 I have been take metformin since then I've lost 70 po?

I am a 38 year old woman with pcos with insulin resistance and impaired glucose tolerance in 2005 I have been take metformin since then I've lost 70 po?

Good job: If you have lost 70# you are doing very well. Weight loss has been shown to improve both pcos and Insulin resistance. Check with your doctor - it is possible your Insulin resistance has improved enough you can decrease the dose of metformin. ...Read more

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What is the definition or description of: glucose tolerance fbs/2hr?

What is the definition or description of: glucose tolerance fbs/2hr?

See below: Glucose tolerance, i.e.: normal sugars are fasting<100, 2 hours after eating<140 glucose intolerance, i.e.: not normal = fasting sugar 100-125 is pre-diabetes and 2-hrs after eating 140-199 is prediabetes. Fasting 126 and higher and 2 hours after eating 200 and greater is diabetes won't get symptoms until frequently or consistently ofter 180; then thirst, frequent urination, hunger. ...Read more

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What is a glucose tolerance test?

What is a glucose tolerance test?

A check for diabetes: The GTT is a way for us to see who is at highest risk of diabetes. It is recommended that everyone be screened during their pregnancy, usually around 24-28 weeks. We will give you a bottle of a very sugary drink. You have five minutes to drink it all! Then a hour later we do a blood test to see how you metabolized the sugar. If you are high risk you may need further testing or treatment. ...Read more

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How do I do a glucose tolerance test?

How do I do a glucose tolerance test?

GTT at home: Glucose tolerance testing is done less frequently now a days. You can do your own home version geta home glucose testing kit. Do the 1st blood glucose after an overnight fast, have a very hearty breakfast and do a bl glucose 1 hour and 2 hrs after the breakfast. Your fasting bl glucose should be below 200 if above 200 you do not need to do the test, you have diabetes and the result will not cha. ...Read more

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I got a glucose tolerance test, now what?

Screen for diabetes: A normal test can help you feel better that you don't have diabetes. An abnormal test can fall into two buckets - either borderline or frankly diabetic. The cutoffs for "abnormal" are different depending on why you had the test. This is a good thing to speak to the ordering physician about. ...Read more

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What can the do in a glucose tolerance test?

Drink glucose soluti: You drink a glucose solution and then have blood samples taken at various intervals to be analyzed for glucose level. ...Read more

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Can impaired glucose tolerance can come back to normal what causes it?

Yes: It is reflective of a tendency toward diabetes. It can return to normal, but it should encourage u to habits that normalize your blood sugar and general health. These include diet and exercise. A diet lower in starch (bread, potatoes, pasta, rice, ) and higher in low starch vegetables and low sugar fruits, is healthier for anyone. Some protein w each meal. Daily exercise, do it, anything u will do. ...Read more

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Passed glucose tolerance with flying colors how come 2 hours fter eating pizza sugar 163?

Passed glucose tolerance with flying colors how come 2 hours fter eating pizza sugar 163?

GTT is variable: A glu tolerance test is variable, which is 1 reason its not done much. It is hard to compare 2 hr post-glu with 2 hr post-pizza. If your glu were 163 post oral glu, that would be impaired glucose tolerance, which may be what you have. Probably best to focus on what you can do. If fasting glu less than 126 and a1c less than 6.5 you don't have diabetes, yet. Can you improve your exercise and weight? ...Read more

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Fail first glucose tolerance test repeated with a fastied 3hour gluclose tolerance with 100mg oral. 1st hr normal 2nd and 3rd is above normal range?

Need more info: Please note that lab results need to be interpreted in the total clinical context and the doctor who ordered the tests is in the best position to do that. Actual values are needed for evaluation and related circumstances, e.g. Are you pregnant? What is your hb a1c level, do you have symptoms of diabetes? ...Read more

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11wks preg. Can't keep anything down. Eat700cal/day.(fruit/baked sweets).lost10 pounds!glucose tolerance test170! Idk what to do! Pre preg.Ha1c was4.5?

11wks preg. Can't keep anything down. Eat700cal/day.(fruit/baked sweets).lost10 pounds!glucose tolerance test170! Idk what to do! Pre preg.Ha1c was4.5?

Obgyn consultation: You will need to see your Obgyn or do a virtual visit to discuss medications to help with pregnancy nausea and vomiting. There are many options. 700 calories a day is quite insufficient. Fruit, baked goods and sweets are not good food choices if you have an abnormal glucose tolerance test. A 3 hr GTT will need to be done. A nutritional consultation would also be useful ...Read more

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What does it mean to have impaired glucose tolerance?

What does it mean to have impaired glucose tolerance?

A form of prediabete: The gold standard for diagnosing diabetes is to drink a very high sugar test drink and measure blood glucose at up to 2 hours after. Normal people will have a 2 hr blood glucose of 200 but for people who are 140-199, the term impaired glucose tolerance is used. This means an increased risk of type 2 diabetes and need for a healthier diet and weight loss ...Read more

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What can I do to imrove impaired glucose tolerance m on diet excercise can it be normal?

Diet: You can improve impaired glucose tolerance by losing weight and following a diet with no concentrated sweets(sugar, pastries, candy, soft drinks, high sugar friuts) and reducing your starch(bread, rice, pasta) intake. ...Read more

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What is the oral glucose tolerance test?

See details: You drink a glucose preparation (glucola) and your blood glucose is checked before you drink it and at intervals up to 3 or 5 hours after you drink it. ...Read more

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What's a one hour oral glucose tolerance test?

What's a one hour oral glucose tolerance test?

Screen test: Popular test in obstetrics to identify gestational diabetes : blood sugar is drawn, the patient drinks 75 gm of glucose in the form of glucola and blood sugar is drawn 1 hr after. ...Read more

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Can taking glucosamine daily affect the glucose tolerance test?

Can taking glucosamine daily affect the glucose tolerance test?

Not at all: Studies have been done with animals , they were given massive amount of glucosamine and they did not develop glucose intolerance. ...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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Do they prick your skin or withdraw for 3 hr glucose tolerance test?

Blood draw: Finger stick glucoses aren't accurate enough for the test. ...Read more

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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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What is the difference between oral glucose tolerance test and modified glucose tolerance test?

THe modified: Test is simpler and shorter -- and used only in pregnant women, looking to diagnose gestational diabetes, or diabetes in pregnancy. ...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
2,658 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