APOC1 (Apolipoprotein C-I) is a protein belonging to the apolipoprotein family, involved in lipid metabolism and transport. It is associated with very low-density lipoproteins (VLDL) and high-density lipoproteins (HDL), helping regulate the breakdown of triglyceride-rich lipoproteins. By inhibiting enzymes such as lipoprotein lipase and hepatic lipase, APOC1 affects blood lipid levels and plays a key role in cardiovascular health. Dysregulation of APOC1 function can contribute to conditions like hyperlipidemia and atherosclerosis.