This is why high TSH indicates low thyroid function and vice versa. While the textbook normal TSH range is between 0.5 mU/L and 5.0 mU/L, other factors influence a person's TSH levels and dictate ...

Levels of thyroid function considered "normal" were still associated with increased mortality, according to a study suggesting that cardiovascular disease (CVD) plays an important role. People ...

Thyroid function tests measure how well your thyroid gland is working. Learn how the tests work and how to understand the results.

In this population, they write, "we found a TSH-level–dependent relation between the degree of thyroid dysfunction and risk of new-onset atrial fibrillation. Our results showed that even ...