What is difference between fasting insulin test and glucose test?

Question

My doctor ordered me bloodwork for fasting insulin. How is this different that a glucose tolerance test or a fasting glucose test?

I have not had a period in a long time and get really shaky sometimes like I need sugar. There is diabetes and prediabetes in my family, so he ordered this test. Will the fasting insulin only give him a picture of what is going on with my bloodsugar?

Answer 1

A fast insulin level will show how much insulin is in your blood when you have had nothing to eat or drink after 12 midnight( or NPO). A glucose tolerance test is done when you have been NPO since midnight, lab person will give you a glucose loaded drink and then they will draw blood samples according to their policy, every hour or 2 for about 6 hours to look at how your pancreas is making insulin to metabolize the glucose you are given in the drink. A fasting glucose test is done when you again have been NPO since midnight blood will be drawn to measure the sugar or glucose in your blood. All of these tests much be done when nothing ( no food or liquid) has been consumed otherwise it will alter the test. The symptoms you are listed are symptoms of low blood sugar not high. Diabetes is caused by the pancreas not making enough insulin to do the job of metabolizing glucose or sugar which is hyperglycemia, you listed symtpoms of hypoglycemia. Hope I have helped you

Answer 2

Fasting Insulin Test

Answer 3

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RE:
What is difference between fasting insulin test and glucose test?
My doctor ordered me bloodwork for fasting insulin. How is this different that a glucose tolerance test or a fasting glucose test?

I have not had a period in a long time and get really shaky sometimes like I need sugar. There is diabetes and prediabetes in my family, so he ordered this test. ...

Answer 4

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Answer 5

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Answer 6

Glucose and insulin are two different things. Insulin is what aides in breaking down glucose. If the levels are high, your blood sugar will be low and vice versa. A GTT and FGT tell them you blood sugar level not how quickly it is being broken down and metabolized.

Answer 7

Part of PCOS is insulin resistance. That is a higher level of insulin is required for any given blood sugar level. C reactive protein is a reflection of inflammation and rasise creatine suggests a degree of renal impairment. Corticosteriods will put your blood sugar up.

Answer 8

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