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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.
ADH is short for Anti Diuretic Hormone and it prevents excess water loss. As such, a hyper-secretion of ADH will result in less urine by volume, and the urine will have a loâ¦wer concentration of water. Conversely, it will have a higher concentration of solutes (Sodium, Potassium, Urea, etc.)