Mineralocorticoids are hormones produced by the outer layer of the adrenal glands that help control the body's balance of salt, water, and electrolytes. The key mineralocorticoid is aldosterone, which signals the kidneys to retain sodium and eliminate potassium, ultimately helping to regulate blood pressure and fluid levels. When too much aldosterone is produced, it can result in high blood pressure and low potassium levels. On the other hand, when there is a deficiency of mineralocorticoids as in adrenal insufficiency it can lead to low blood pressure, fatigue, and salt loss. In such cases, medications like fludrocortisone may be prescribed to help restore normal mineralocorticoid function and maintain stable electrolyte levels.