Q. What does it mean by low insulin with pretty normal glucose in a blood report?

Answered by
Dr. Shaikh Sadaf
and medically reviewed by Dr. Vinodhini. J
This is a premium question & answer published on Mar 17, 2020

Hello doctor,

I am 26 years old. I am diagnosed with hypothyroid about four years ago. I started from 0.25 mcg Levothyroxine, and now taking levothyroxine 0.75 mcg. Recently, I lost 4 pounds which is very bad because I am 5.6 tall and my weight is 116 pounds. I feel weak and dizzy very often. I also have irregular heavy periods and symptoms of having too much male hormone (too much hair on legs, bikini, etc, severe acne especially a week before expected period). Since one year my periods cycle became longer, before it used to be 28 days and now it is 38 days.

I am also worried because of low insulin and pretty normal glucose. What does it mean? May it be because I am on gluten-free diet for two years? Please also look at my sex hormones prolactin looks too high, and I am not sure about testosterone.

Dr. Shaikh Sadaf

Diabetology Endocrinology


Welcome to icliniq.com.

I just read your query and the detailed information you have mentioned in the attached reports. (attachment removed to protect patient identity).

The thyroid function is good and you must take your medicine regularly as usual. Do not worry about the insulin levels it is a good thing, it means you are perfectly normal.

Your prolactin levels are the ones that you should be worried about as they are the ones causing your irregular periods. They need treatment. I would suggest that you take tablet Cabergoline 0.25 mg orally twice a week for two weeks and then repeat your serum prolactin levels.

Your testosterone levels are within normal limits and perfectly normal as well.

I hope this helps.

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