TSH levels higher than 4.5 mU/L usually indicate an underactive thyroid (hypothyroidism), and low TSH levels—below 0.4 ...

Hypothyroidism with normal TSH levels can still lead to common symptoms of low thyroid function. These symptoms can include: There are two main types of conditions—primary and secondary ...

Modern-day TSH methods however, with their enhanced sensitivity are also capable of detecting the low TSH values typical ... With this level of sensitivity, it is possible to distinguish the ...

Some physicians use a low-normal range therapeutic target for TSH when patients have undetectable serum Tg levels and have had no recurrence 5-10 years after thyroidectomy. If iodide intake is ...