Cholesterol numbers, decoded: LDL, HDL, triglycerides, and ApoB
Your lipid panel has five numbers that actually matter. Here's what each one tells you about your heart-attack risk.
A lipid panel is one of the highest-value tests in medicine. It costs almost nothing, catches a leading cause of death, and points to a fix that works. But most people never look at their own numbers. The USPSTF recommends statin therapy discussions for adults 40–75 with at least one cardiovascular risk factor and a 10-year risk of 10% or more (USPSTF, 2022), which requires knowing your lipid numbers first.
The five numbers
The targets below follow the 2018 ACC/AHA cholesterol guideline and the CDC's patient-facing summaries. Targets are individualized — your clinician sets yours based on your overall risk, not on a single number.
- Total cholesterol — a rough summary; the individual components matter more (CDC, Cholesterol Basics).
- LDL — 'bad' cholesterol. Roughly under 100 mg/dL for average-risk adults, and lower targets (often under 70) for people already at high risk (2018 ACC/AHA cholesterol guideline).
- HDL — 'good' cholesterol. Higher is generally more favourable; commonly cited thresholds are 40+ mg/dL (men) and 50+ mg/dL (women) (NHLBI / CDC).
- Triglycerides — under 150 mg/dL is the usual normal cut-off; levels respond strongly to sugar and alcohol intake (2018 ACC/AHA guideline).
- ApoB — an additional risk marker the ACC/AHA lists among 'risk-enhancing factors' (≥130 mg/dL). Not part of a standard panel everywhere, and coverage varies.
What moves the numbers
Dietary and lifestyle change typically shifts LDL modestly, while moderate- to high-intensity statin therapy lowers LDL by roughly 30% to 50% or more (2018 ACC/AHA cholesterol guideline, Table 3). If your LDL is high and you have a family history of early heart disease, medication is one option to discuss — not a personal failure.
These ranges are general reference points, not a reading of your results. Only a clinician who knows your full history can interpret your panel.
Sources
This is not medical advice. Clinic Compass is an educational tool to help you prepare for a walk-in visit. It does not create a doctor–patient relationship, does not diagnose or treat any condition, and is not a substitute for the judgement of a licensed healthcare professional who knows your history. Never delay, avoid, or change medical care because of something you read here. In an emergency, call 911 or your local emergency number.
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