Aldosterone: A hormone produced by the outer portion (cortex) of the adrenal gland. Aldosterone regulates the balance of water and electrolytes in the body, encouraging the kidney to excrete potassium into the urine and retain sodium, thereby retaining water. It is classified as a mineralocorticoid hormone.
Subscribe to MedicineNet's Women's Health Newsletter
Women's Conditions Resources
Last Editorial Review: 5/13/2016