What does the Total Cholesterol test measure?

Why is Total Cholesterol measured?

Total cholesterol is a long-standing component of cardiovascular risk assessment and contributes to risk-scoring algorithms, but on its own it is a coarse and potentially misleading measure: a raised total can reflect harmful LDL or protective HDL. It is most useful within the full lipid panel, where LDL-C, HDL-C, triglycerides, and non-HDL-C give it meaning, and it is not an adequate basis for treatment decisions in isolation.

Reference ranges

Standard reference

Desirable: <200 mg/dL (<5.2 mmol/L); borderline high: 200–239 mg/dL; high: ≥240 mg/dL # REVIEWER FLAG: Thresholds follow population guidance (e.g. ATP III / ACC-AHA) and are risk-context-dependent rather than absolute — reviewer to confirm framing and units.

Functional medicine optimal

<180 mg/dL is sometimes cited as optimal in low-risk individuals, though targets are risk-dependent and set on LDL-C and non-HDL-C rather than total cholesterol # REVIEWER FLAG: 'Optimal' total cholesterol below standard thresholds is context-dependent and not a treatment target — reviewer to confirm framing.

Units

mmol/L, mg/dL

Reference ranges vary by laboratory and assay platform. Interpret in context of the issuing laboratory's stated range.