Which hormone is not produced by the anterior pituitary gland?

The reason why ADH (antidiuretic hormone) is not produced by the anterior pituitary gland is because it is actually synthesized in the hypothalamus, a distinct region of the brain. ADH is then transported down nerve fibers to the posterior pituitary gland, where it is stored and released into the bloodstream when needed. This contrasts with the hormones produced by the anterior pituitary, such as LH (luteinizing hormone), FSH (follicle-stimulating hormone), and GH (growth hormone), which are all secreted directly by this gland to regulate various physiological processes. Understanding the distinction between hormones produced in the anterior pituitary versus those in the hypothalamus and posterior pituitary is crucial for comprehending the endocrine system's functionality and regulation.