Thyroid Blood Tests Explained: Understanding TSH, T3 and T4

Thyroid blood tests are commonly used to assess how effectively the thyroid gland is regulating metabolism. Typical thyroid panels include markers such as TSH, free T4 and free T3.

Why Thyroid Health Matters

The thyroid gland plays a central role in metabolic regulation. According to the Australian Thyroid Foundation, thyroid disorders affect around one in twenty Australians.

What TSH Measures

TSH is produced by the pituitary gland and signals the thyroid to produce hormones.

What T4 & T3 Measures

T4 and T3 are thyroid hormones that regulate metabolism, energy production and temperature regulation.

Expert Insight

Professor Creswell Eastman, a leading Australian endocrinologist, explains:

“The thyroid gland regulates many of the body’s most fundamental metabolic processes.”

Why Context matters

Thyroid markers are interpreted alongside each other rather than individually.