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Insulin Blood Test Range

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Insulin: Reference Range, Interpretation, Collection And Panels

Insulin is an anabolic hormone that promotes glucose uptake, glycogenesis, lipogenesis, and protein synthesis of skeletal muscle and fat tissue through the tyrosine kinase receptor pathway. In addition, insulin is the most important factor in the regulation of plasma glucose homeostasis, as it counteracts glucagon and other catabolic hormonesepinephrine, glucocorticoid, and growth hormone. Table 1. Reference Range of Insulin Levels [ 1 ] (Open Table in a new window) A standard insulin test is positive for endogenous insulin and exogenous insulin. In addition, there is a minimal cross-reaction with proinsulin and insulinlike growth factors 1 and 2, with the degree of variability depending on the brand of the testing toolkit and technique used. Insulin testing is used to assist in identifying causes of hypoglycemia (plasma glucose levels < 55 mg/dL), especially upon signs and symptoms of hypoglycemia (neurohypoglycopenic and autonomic symptoms). In this scenario, a 72-hour fasting test is performed. [ 2 ] Insulinoma: High insulin and C-peptide levels Nonbeta cell tumors: Low insulin and C-peptide levels and high insulinlike growth factor 2 level [ 3 ] Excessive insulin administratio Continue reading >>

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  1. Jennifer72

    Fasting Insulin Level after 12-20 Hour Fast

    Had a fasting insulin blood test done at lab yesterday morning at 8:30 AM. It's the first time I've done it. Was curious. Only cost me like $26 to find out. I already knew I was highly insulin resistant type 2. i.e. I know that 1 unit of regular insulin only covers 2 mg/dL of blood glucose (as a corrective dose).
    I hadn't eaten any solid food before blood test, except for 20 hours earlier. I had coffee about 12 1/2 hours before test.. Nothing after the coffee.
    My Fasting Insulin was 12.9 uIU/ml and my fasting blood glucose was 124 mg/dL. (Normal fasting insulin range is 2.6 to 24.9 according to the blood test sheet).
    My calculated HOMA-IR score is then (12.9*124)/405 = 3.95. A score of 1.0 or less is normal from what I've read -- i.e. not insulin resistant.
    Anyways, since this is the first time I've done this test, I'd appreciate if anyone could chime in and tell me all they can about what I just found out with the test.
    Is there any way to determine how strong my pancreas is with this test? Or should I follow this fasting insulin test with another in a couple days where I drink like 100g of glucose 1 hour before the test? If the fasting insulin level is the same, then my pancreas is doing all it can do when fasting even right?

  2. Nicoletti

    I've never had any type of insulin test and it's never occurred to me to have one. My thought is with the way I eat my blood sugars are decent and that's all I care about.

  3. Jennifer72

    Originally Posted by Nicoletti
    I've never had any type of insulin test and it's never occurred to me to have one. My thought is with the way I eat my blood sugars are decent and that's all I care about. Well I've done everything I can with respect to eating and can't get blood sugar below 110-135 range all day. So I am concerned about it. I am thinking my pancreas might be weakened too much.. but again you've seen the amount of insulin it's putting out. 12.9 .. normal is down to 2.9 .. so I guess it still must be somewhat strong? I'm just highly resistant.

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