The thyroid is a butterfly-shaped gland that sits in the front of the neck. It produces hormones that are essential for heart rate, digestion, mood, and other functions crucial to human health.

Thyroid level tests, including thyroid-stimulating hormone (TSH) and free T4, help diagnose underactive or overactive thyroid. Doctors may also check free T3, calcitonin, thyroglobulin, or thyroid ...

Conditions that affect the thyroid can cause symptoms similar to endometriosis. Part of the endocrine system, the thyroid gland produces hormones that impact every other function in the body.

There is a growing list of medications known to adversely affect thyroid function or interpretation of the results of standard thyroid laboratory testing. Many of these drugs are commonly used ...

The thyroid gland produces hormones that regulate metabolism, body temperature, and growth. Thyroid problems can cause weight changes, mood swings, and neck swelling. The thyroid is a small, butterfly ...

When assessing thyroid function, thyroid hormone levels ― particularly free thyroxine (FT4) levels ― consistently show stronger associations with a wide array of clinical conditions than the standard ...

Please provide your email address to receive an email when new articles are posted on . Researchers created thyroid function reference ranges adjusted for age, sex and racial-ethnic background. Using ...