Adrenal insufficiency
Adrenal insufficiency is a condition in which the adrenal glands do not produce adequate amounts of steroid hormones , primarily cortisol; but may also include impaired production of aldosterone ( a mineralocorticoid ) , which regulates sodium conservation , potassium secretion , and water retention . 
<triplet> cortisol <subj> steroid hormone <obj> instance of <triplet> aldosterone <subj> mineralocorticoid <obj> instance of