What is an Underactive Thyroid? An underactive thyroid, or hypothyroidism, is a condition wherein the thyroid gland fails to produce adequate hormone levels. This crucial gland, shaped like a ...

Hypothyroidism often slows metabolism, causing your body to burn fewer calories than normal, and leading to weight gain, ...

The main purpose of the thyroid gland is to run the body's metabolism (1). This is why symptoms of hypothyroidism resemble ...