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Doctor insights on: Low Blood Sugar After Glucose Tolerance Test

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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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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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A1c 4.9 while on low carb diet passed glucose tolerance test go to bed sugars at 100 or lower wake up 8 hrs later sugar 110 or so why & am i prediabet?

A1c 4.9 while on low carb diet passed glucose tolerance test go to bed sugars at 100 or lower wake up 8 hrs later sugar 110 or so why & am i prediabet?

We're all Prediabeti: As we grow older, we all tend to become Insulin resistant to some degree or other. Consequently, our sugars tend to rise, along with our insulin. Insulin is the hormone that causes sugar to enter our cells, where the excess is stored as fat. I recommend a low carb diet to everyone, and also recommend that just about everyone over 30 will benefit from metformin (an Insulin receptor sensitizer). ...Read more

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Glucose tolerance test negative but every morning I wake up with fasting sugar 104-108 . If I eat sugar during day sugar not high. So what do I do?

Glucose tolerance test negative but every morning I wake up with fasting sugar 104-108 .  If I eat sugar during day sugar not high. So what do I do?

More testing needed: You are prob a pre-diabetic or have a metabolic syndrome. You need further testing to confirm. Ask your doctor for a Hemoglobin A1C test. It gives you the ave blood glucose over the last 3 months. Normal is <5.7, borderline is 5.7-6.4, and 6.5 or higher is diabetes. Start checking your fingersticks intermittently. Some fasting and some 2 hrs after a meal. AM goal is <100, after meal is <180 ...Read more

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Did 5 hr glucose tolerance test dint know results but do know at 5 hrs my sugar was 74 is that a giod sign?

Did 5 hr glucose tolerance test dint know results but do know at 5 hrs my sugar was 74 is that a giod sign?

Normal: This is a normal number. What were you screening for? This is not generally a recommended test for screening for diabetes. It is not the gold standard for screening for hypoglycemia either. ...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 ?

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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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

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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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Can you tell me about glucose tolerance test, now what?

Can you tell me about glucose tolerance test, now what?

Test: Hi. The most standardized test for diabetes, the Oral Glucose Tolerance Test generates data for fasting and a "postprandial" in response to a standard caloric challenge (75 grams of glucose) measured 2 hr after the glucose. Based on criteria for the fasting and 2 hour post-challenge glucoses, you are either normal, diabetic, or the gray zone in between, pre diabetes. Eat healthy diet & exercise! ...Read more

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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

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
2,588 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