Non-HDL cholesterol is total cholesterol minus HDL cholesterol, a calculated figure rather than a separate measurement. It sums the cholesterol carried by all the potentially atherogenic particles, including LDL, remnant and very-low-density lipoproteins. It is used in the lipid profile as a summary of the lipid burden that can accumulate in artery walls.
No readings for this marker yet.
Higher non-HDL cholesterol most often accompanies raised LDL cholesterol, raised triglycerides or a low HDL cholesterol, and points to diets high in saturated fat, obesity, insulin resistance, hypothyroidism, kidney or liver disease, or an inherited lipid disorder. Lower values usually reflect a favourable lipid pattern, though they can also follow malnutrition, malabsorption, an overactive thyroid or serious illness. Because it is derived from two other results, an unexpected figure is checked by repeating the whole panel and reviewed with a doctor.
Any error or physiological shift in total or HDL cholesterol carries straight into this number, and acute illness, recent weight change or pregnancy will move it. Unlike calculated LDL cholesterol it stays usable when triglycerides are high, which is where it is most valuable. It is read together with total cholesterol, HDL cholesterol, LDL cholesterol and triglycerides, and tracks closely with apolipoprotein B.
Reference ranges are general adult values and depend on lab, assay, age and sex. For orientation, not diagnosis — discuss results with your doctor.