Medically reviewed by Kelly Wood, MD Key Takeaways High TSH levels usually mean the thyroid is underactive, which is called ...

High TSH levels can mean you have an underactive thyroid or a pituitary gland tumor. Low TSH levels can mean you have an overactive thyroid or issues with the pituitary gland. TSH levels are first ...

TSH: This regulates the production of thyroid hormones T3 and T4. High levels of TSH may indicate an underactive thyroid, while low levels may suggest an overactive thyroid. T4: The main hormone that ...

If a person wants to carry out a thyroid test, they may consider one of the following from these popular companies. None of these companies state that the Food and Drug Administration (FDA) approves ...

Please provide your email address to receive an email when new articles are posted on . Of adults receiving levothyroxine therapy for hypothyroidism, 43.8% had either low or high TSH levels. TSH ...