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Why the Test is Performed. ADH is a hormone that is produced in a part of the brain called the hypothalamus. It is then stored and released from the pituitary, a small gland at the base of the brain. ADH acts on the kidneys to control the amount of water excreted in the urine. Certain diseases affect the normal release of ADH.
Vasopressin, also known as antidiuretic hormone or ADH, maintains  the body's water balance by promoting the kidneys to reabsorb  water. ADH is secreted by the posterior pit â¦ uitary gland.It works  by making collecting tubules of nephrons in the kidneys permeable  to water.asopressin, also known as antidiuretic hormone or ADH, maintains  the body's water balance by promoting the kidneys to reabsorb  water. ADH is secreted by the posterior pit â¦ uitary gland.