Proinsulin is the precursor molecule to insulin, synthesized in the pancreatic β-cells. During insulin production, proinsulin undergoes enzymatic cleavage to form insulin and C-peptide. Accurate measurement of proinsulin levels is essential for diagnosing and monitoring conditions such as type 2 diabetes and insulinomas. To support the development of precise diagnostic assays, Meridian Bioscience offers high-quality reagents targeting proinsulin