ACE (Angiotensin-Converting Enzyme): ACE is a crucial enzyme in the Renin-Angiotensin System (RAS) that helps regulate blood pressure and fluid balance. It converts angiotensin I into angiotensin II, a potent vasoconstrictor that influences blood vessel tone, electrolyte levels, and triggers aldosterone release. ACE also has significant roles in heart function, kidney health, and inflammatory processes. Imbalances in ACE activity are associated with conditions such as hypertension, heart failure, and kidney disease.