Which hormone is NOT produced by the anterior pituitary gland?

The hormone that is not produced by the anterior pituitary gland is vasopressin, also known as antidiuretic hormone (ADH). Vasopressin is synthesized in the hypothalamus and then transported to the posterior pituitary gland, where it is stored and eventually released into the bloodstream.

In contrast, growth hormone, thyroid-stimulating hormone, and luteinizing hormone are all produced by the anterior pituitary gland. Growth hormone is important for growth and metabolism. Thyroid-stimulating hormone stimulates the thyroid gland to produce thyroid hormones, which regulate metabolism. Luteinizing hormone is crucial for regulating the reproductive system, including ovulation in females and testosterone production in males. Thus, vasopressin is distinct from these other hormones due to its origin and the gland responsible for its production.