VLDL cholesterol: why it is estimated, not routinely reported in the UK

VLDL stands for very low-density lipoprotein. The liver assembles it from fats it has made or taken up, wrapped in apolipoprotein B-100, to export triglycerides to muscle and fat tissue. Lab Tests Online UK describes how the body repackages lipids in the liver and combines them with apo B-100 to form triglyceride-rich VLDL, after which the enzyme lipoprotein lipase removes triglycerides to create intermediate-density lipoproteins and then LDL.

That makes VLDL a precursor of LDL, and the cholesterol it carries counts among the atherogenic cholesterol that non-HDL measures capture.

Lab Tests Online UK says the VLDL test is not in routine use in the United Kingdom. VLDL cholesterol, like all lipoprotein fractions, can be measured directly using lipoprotein electrophoresis and ultracentrifugation, but these techniques are complex and expensive and are generally carried out in specialty laboratories, most often for research purposes.

You may still see a VLDL figure on a lipid report from a private provider or from abroad. In many such reports it is an estimate derived from the triglyceride result rather than a measured quantity. That estimate behaves like triglycerides and tells you little that the triglyceride result does not already show.

A standard lipid profile includes total cholesterol, HDL cholesterol and triglycerides, and LDL cholesterol is usually calculated from them. Non-HDL cholesterol, which is total cholesterol minus HDL, includes VLDL, IDL and LDL cholesterol and is increasingly used to estimate cardiovascular risk. When triglycerides are high enough that the calculation is unreliable, direct LDL cholesterol or apo B may be requested.

The NHS says high cholesterol does not usually cause symptoms and that the test result, with age, ethnicity, smoking and blood pressure, feeds a ten-year risk score used at NHS Health Checks.

High triglycerides, and therefore high VLDL, are driven by diet high in fat or sugar, alcohol, obesity, diabetes, an underactive thyroid, kidney or liver disease, pregnancy and genetic factors, as listed by Lab Tests Online UK. Very high triglycerides, at least 10 to 15 mmol/L, are associated with pancreatitis risk and need active treatment.

The approach is the same whatever the figure called VLDL says: reduce alcohol and sugar, lose excess weight, be active, control diabetes and thyroid disease, and consider medicines on specialist advice. Persistent severe abdominal pain with vomiting warrants urgent care via NHS 111 or A&E.

No special preparation is usually needed for a lipid profile; the NHS says some people are asked not to eat for up to 12 hours but most do not need to. If your report shows a VLDL number, ask your clinician which of the measured values they are using to make decisions, usually triglycerides, non-HDL and LDL cholesterol.