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May 11, 2003

Thyroid

Question from Ontario, Canada:

I have type 1 diabetes, and I have recently been told that my thyroid is underactive, and my TSH is 8.86 MU/L. I do not feel that bad, but my insulin requirements have increased in the last five months by about 25%. Does an underactive thyroid cause a person to require more or less insulin?

Answer:

Many people do not even have symptoms at the level of TSH which you indicate. It is not clear that the increase in insulin requirements you describe even have anything to do with your thyroid state.

JTL