A cholesterol test report can look like a wall of letters and numbers. Here’s what each one actually means.
Total cholesterol is the broadest measure, but on its own it tells us relatively little – it’s a mix of the good and bad components, and a normal-looking total can still hide an unfavourable balance underneath.
LDL cholesterol is the one most people mean when they say bad cholesterol. It carries cholesterol into artery walls, where it contributes to the build-up that narrows blood vessels over time. Lower is generally better, and how low depends on your individual risk, not a single universal target.
HDL cholesterol works the other way, helping to clear cholesterol from the bloodstream. Higher levels are broadly protective, though extremely high HDL is not automatically better and is looked at in context.
ApoB is the number I pay closest attention to, and it’s not yet routinely tested everywhere. It measures the actual number of cholesterol-carrying particles in your blood, rather than how much cholesterol they contain. Two people can have similar LDL but very different ApoB, and it’s the particle count that drives arterial damage. Where there’s uncertainty from LDL alone, ApoB often settles it.
None of these numbers exist to alarm you. They exist to help us decide, together, whether lifestyle changes are enough or whether medication would meaningfully lower your risk – and to track whether whatever we choose is actually working.