Hypothyroidism is typically measured by what level of thyroid-stimulating hormone?

Hypothyroidism is characterized by an underactive thyroid, which fails to produce sufficient levels of thyroid hormones. In response to low hormone levels, the pituitary gland increases the production of thyroid-stimulating hormone (TSH) to stimulate the thyroid gland to produce more hormones. Therefore, individuals with hypothyroidism typically show elevated levels of TSH in their blood tests. A high TSH level serves as a key indicator for diagnosing this condition, as it reflects the body's attempt to signal the thyroid to increase hormone production in the face of deficits. This understanding is crucial for recognizing how the body's regulatory mechanisms respond to hormone imbalances.