Adrenal Glands

The adrenals are located just above the kidney's and secrete several hormones including aldosterone and cortisol.

aldosterone is important in regulating fluid and electrolyte balance. On average, aldosterone levels are 30% lower in adults age 70 to 80 years old than in younger adults. Lower aldosterone levels may cause orthostatic hypotension (a drop in blood pressure with changes in position).

cortisol is a stress response hormone that has anti-inflammatory and anti-allergy effects. Secretion of cortisol diminishes by 25% with age although the significance of this remains unclear. DHEA blood levels decline with age. However, the functional consequences of this decline are not clear.