What is the "remnant cholesterol" concept and why is it becoming more important?

Remnant cholesterol (RC) refers to the cholesterol carried in triglyceride-rich lipoprotein remnants (VLDL remnants, IDL) after triglyceride removal, it is calculated as total cholesterol minus LDL-C minus HDL-C, and a 2020 Mendelian randomization study in 106,000 individuals found that elevated remnant cholesterol caused coronary artery disease independently of LDL-C, establishing it as a causal cardiovascular risk factor rather than merely a marker (Varbo et al., JACC, 2020).

Remnant cholesterol is elevated in men with hypertriglyceridemia and insulin resistance, the same men who often have discordant ApoB/LDL-C. This is why non-HDL cholesterol (total cholesterol minus HDL-C, which includes LDL-C and remnant cholesterol) is a better cardiovascular risk predictor than LDL-C alone in most guidelines. Target non-HDL cholesterol: below 130 mg/dL for average risk, below 100 mg/dL for high risk.

Honesty Scale: Solid (1) for remnant cholesterol as a causal cardiovascular risk factor in the Mendelian randomization data.

What to do: Calculate your non-HDL cholesterol from your standard lipid panel (total cholesterol minus HDL). If above 130 mg/dL, this is a treatment target that may require attention even if your LDL-C appears acceptable.

For the full picture, read The ApoB/Lp(a)/Lipids Deep Dive