lab metric
TC/HDL Ratio
Table of contents
Description
The Total Cholesterol / HDL ratio (TC/HDL) compares your total cholesterol to your HDL (“protective”) cholesterol. It’s a simple way to summarize lipid balance: for the same total cholesterol, a higher HDL generally lowers the ratio and tends to be associated with lower cardiovascular risk.
Why it matters
Ratios can sometimes communicate risk more clearly than one number alone. TC/HDL is not the only lipid ratio, but it can be a helpful screening metric—especially when viewed alongside LDL-C, triglycerides, and (ideally) ApoB or non-HDL cholesterol.
Interpreting the ratio (general)
Lower is generally better. Many clinicians consider:
< 3.5: favorable
3.5–5: intermediate (context matters)
> 5: higher risk pattern
These thresholds vary by guideline and individual risk factors.
What pushes the ratio higher
Lower HDL, higher LDL/VLDL burden, insulin resistance, smoking, inactivity, and genetics can all contribute. Lifestyle improvements that lower triglycerides and improve insulin sensitivity often improve the ratio too.
Educational only, not medical advice. Lipids should be interpreted in the context of overall risk (blood pressure, glucose, family history, Lp(a), ApoB) with a clinician.
Frequently Asked Questions
Clarity before
you commit
Answers on setup, scale, and support to remove blockers.
