What Does It Mean When You Have High Insulin Levels?

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A C-peptide test measures the level of this peptide in the blood. It is generally found in amounts equal to insulin because insulin and C-peptide are linked when first made by the pancreas. Insulin helps the body use and control the amount of sugar (glucose) in the blood. Insulin allows glucose to enter body cells where it is used for energy. The level of C-peptide in the blood can show how much insulin is being made by the pancreas . C-peptide does not affect the blood sugar level in the body. A C-peptide test can be done when diabetes has just been found and it is not clear whether type 1 diabetes or type 2 diabetes is present. A person whose pancreas does not make any insulin (type 1 diabetes) has a low level of insulin and C-peptide. A person with type 2 diabetes can have a normal or high level of C-peptide. A C-peptide test can also help find the cause of low blood sugar (hypoglycemia), such as excessive use of medicine to treat diabetes or a noncancerous growth (tumor) in the pancreas (insulinoma). Because man-made (synthetic) insulin does not have C-peptide, a person with a low blood sugar level from taking too much insulin will have a low C-peptide level but a high level of Continue reading >>

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Popular Questions

  1. spakesneaker

    What does it mean if, in a blood test, insulin is high but glucose levels are normal? Doesn't this mean that a person's cells might be resistant to insulin?
    I ask because I had an extremely frustrating doctor's appointment today where the doctor looked over my blood test results from a few years ago when I was diagnosed as PCOS and insulin resistant. She said that because my glucose levels are normal (and I don't have problems with blood pressure or triglycerides), I don't have insulin resistance--she also said that fasting insulin is meaningless as a test, and that it doesn't really tell us anything medically.
    I know that my glucose levels are normal, but I have no idea what my base insulin levels are like these days (although I'm sure that with primal they're a lot better than they used to be), because doctors don't seem to find it a valuable test to run on someone who previously had ridiculously high insulin levels.
    WTF?? Someone please explain this to me. Did I just go to an incredibly stupid doctor, who won't recommend any treatment other than "continue losing weight, and eat more fruits and vegetables" unless a patient's hyperinsulinemia progresses to type 2 diabetes??

  2. AndreaReina

    Have they done a glucose tolerance test (drink a glucose solution, see how long it takes for BS to fall)? If both fasting glucose and glucose tolerance show good results I imagine you should be fine, since the problem with insulin resistance is that it results in chronically elevated BS. I don't really know what an insulin test would show independently of glucose, but this isn't something I've researched a lot, sorry.

  3. O_O

    Did your doctor do a HbA1C and a fasting glucose test?

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