Free T3

Aliases: Free Triiodothyronine

Group: Hormone

Description:

T3 is one of two major hormones made by the thyroid, a small, butterfly-shaped gland located near the throat. The other hormone is called thyroxine (T4). T3 and T4 work together to regulate how the body uses energy. These hormones also play an important role in controlling weight, body temperature, muscle strength, and nervous system. The T3 hormone comes in two forms: - Free T3, which does not attach to anything - Bound T3, which attaches to protein If T3 levels are not normal, it can be a sign of thyroid disease.