"Overactive thyroid" refers to a condition in which the thyroid gland produces too much of a hormone called thyroxine. This can lead to an increased metabolism, causing symptoms like weight loss, rapid heartbeat, and anxiety. Full definition
Critics argued, for example, that the radioactive isotope most likely to damage the thyroid gland — iodine - 131 — has long been used to treat overactive thyroid glands in adults. (newscientist.com)
Many people with overactive thyroid ask if it is a good idea to take kelp or other natural sources of iodine as they think taking iodine supplements may worsen their condition. (fullhealthsecrets.com)
Graves» disease is the most common cause of overactive thyroid (hyperthyroidism) in the US. (health.com)