What is a mineralcorticoid?

Mineralocorticoids are hormones secreted by the adrenal cortex that regulate salt and water balance in the body. Mineralcorticoid deficiency (as seen in canine Addison’s disease) leads to high potassium levels, low salt levels, and poor heart function. Aldosterone has major mineralcorticoid activity in the body but cortisol also plays a minor part.