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