ACE (Angiotensin-Converting Enzyme): ACE is a crucial enzyme in the Renin-Angiotensin System (RAS) that plays a vital role in regulating blood pressure and fluid balance. It catalyzes the conversion of angiotensin I to angiotensin II, a potent vasoconstrictor. This process helps manage vascular tone, electrolyte balance, and blood pressure. Beyond its role in narrowing blood vessels and triggering aldosterone release, ACE is involved in heart function, kidney health, and inflammatory responses. Dysregulation of ACE activity is associated with conditions such as hypertension, heart failure, and kidney disease.