T4 levels | 合法醫療器材資訊網

2020年7月15日—Inadults,normallevelsoftotalT4rangefrom5–12microgramsperdeciliter(mcg/dl)ofblood.NormallevelsoffreeT4rangefrom0.8–1.8 ...

Thyroxine (T4) levels differ from person to person but usually exist within a consistent range. Abnormal T4 levels can lead to a variety of symptoms and complications.

T4 is a type of thyroid hormone that regulates metabolism. T4 plays an important role in digestion, muscle function, and bone health.

In this article, we outline the normal T4 levels in adults and children. We also list some potential causes and symptoms of changes in these levels and outline treatment options.

Two separate glands determine T4 levels: the thyroid gland in the neck and the pituitary gland in the brain.

The pituitary gland is responsible for making the thyroid stimulating hormone (TSH)[1]. This hormone controls levels of the thyroid hormone T4. The pituitary gland adjusts its production of TSH a...