If your healthcare provider has ordered a T4 test, you may wonder what it is. Thyroxine is another name for T4, which is one ...

Thyroxine (T4) is the main hormone your thyroid makes. Your thyroid hormones are important because they control how your body uses energy from the food you eat. (Photo Credit: iStock/Getty Images) T4 ...

Thyroxine (T4) levels differ from person to person but usually exist within a consistent range. Abnormal T4 levels can lead to various symptoms and complications, including mental health and digestive ...

If a doctor is concerned about your thyroid function, they may recommend a series of blood tests. These tests are used to identify levels of hormones produced in the thyroid. You may also be able to ...