2) In the start of a shift of perspective nearly 20 years later, the court in State ex rel.
Best Answer: Yes there is a link between having an underactive thyroid and having high cholesterol. In someone with high cholesterol, thyroid function is usually one of the first things that gets investigated.
1 High cortisol levels decrease the conversion of thyroxine (T4) to triiodothyronine (T3) and increase levels of reverse thyroid hormone (rT3). Together this means lower thyroid function and hypothyroid.  For optimal thyroid function you donât want cortisol too high or too low.