C-type natriuretic peptide (CNP) is a hormone produced primarily in the brain and vascular endothelium. It plays a crucial role in regulating blood pressure and fluid balance by promoting vasodilation, which helps widen blood vessels. CNP also inhibits the growth of certain cells, contributing to cardiovascular health. CNP is part of the natriuretic peptide family, which includes atrial natriuretic peptide (ANP) and B-type natriuretic peptide (BNP). These peptides work together to manage blood volume and pressure. Research on CNP is ongoing, as it may have therapeutic potential for treating heart-related conditions.