#normal thyroid levels

Thyroid: Causes, Symptoms, and Treatment

Metabolism is how your body turns food into energy. This energy helps you do everything—from breathing to walking. A few key hormones called T4 and T3 control this process, and they are made by the thyroid gland. The thyroid is controlled by another small gland in the brain called the pituitary gland. It sends out a hormone called TSH (thyroid-stimulating hormone), which tells the thyroid how much T4 and T3 to release.

Thyroid: Causes, Symptoms, and Treatment

TSH tells the thyroid what needs to be done to get the body back to normal. As long as these hormones are released in the correct quantity, your metabolism will function with no hitch. But if this goes out of whack—as it sometimes does, it leads to hyper- or hypothyroidism.

Thyroid Levels - Hypothyroidism - Hyperthyroidism

Thyroid Levels - Hypothyroidism - Hyperthyroidism