This document discusses aldosterone and hormone replacement therapy for conditions like Addison's disease. Aldosterone is a hormone produced by the adrenal glands that regulates blood pressure and salt/water balance. Addison's disease occurs when the body does not produce enough aldosterone, disrupting salt/water balance and blood pressure. Hormone replacement therapy can treat Addison's disease by replacing missing hormones. Long term benefits include reduced risks of various health issues, while allowing patients to live normal lives with treatment.