What is VLDL Cholesterol (Very Low-Density Lipoprotein Cholesterol)?
VLDL (very low-density lipoprotein) particles are assembled by the liver from triglycerides, cholesterol, and apolipoprotein B-100, and secreted into the circulation as the primary vehicle for hepatic triglyceride export to peripheral tissues. Each VLDL particle carries one ApoB-100 molecule. As VLDL-TG is hydrolysed by lipoprotein lipase, the particles progressively shrink and enrich in cholesterol, transitioning through IDL to LDL. VLDL-C is estimated in the standard lipid panel as triglycerides ÷ 5, based on the average TG:cholesterol ratio of VLDL particles — an assumption that becomes unreliable when triglycerides are markedly elevated or when a large proportion of the triglyceride pool is in non-VLDL particles.