LDL Cholesterol vs HDL Cholesterol: what's the difference?
Educational — not medical advice · Ranges vary between laboratories
The short answer: LDL is the cholesterol that deposits in artery walls, so lower is better — under 100 mg/dL is optimal for most people. HDL is the cleanup crew carrying cholesterol back to the liver, so higher is better, with above 40 mg/dL for men and 50 for women considered acceptable.
LDL particles ferry cholesterol into tissues, including artery walls, where it builds plaque over years. Lowering LDL measurably lowers heart-attack and stroke risk — it's one of medicine's best-proven levers.
Full LDL Cholesterol guideHDL particles act like a cleanup crew, transporting cholesterol back to the liver for disposal. Higher levels generally track with lower heart risk.
Full HDL Cholesterol guideAt a glance
| LDL Cholesterol | HDL Cholesterol | |
|---|---|---|
| Panel | Lipid profile | Lipid profile |
| Unit | mg/dL | mg/dL |
| Typical adult range | Normal 40–100 mg/dL | Normal 40–100 mg/dL |
| Also known as | LDL, LDL-C, Low Density Lipoprotein | HDL, HDL-C, High Density Lipoprotein |
General adult reference intervals — your lab's printed range takes precedence.
Why they're often tested together
They come from the same lipid profile and pull in opposite directions, which is why total cholesterol on its own is a blunt number. Two people with identical totals can have very different LDL and HDL splits, and very different risk pictures underneath.
Questions people ask
Can HDL be too high?
Very high HDL isn't automatically extra-protective — the relationship flattens out at the top end. It reads best as one part of the whole lipid profile rather than a score to maximize.
Which one responds to exercise?
Exercise is the most reliable lever on HDL, which tends to run low with inactivity, smoking, and high-sugar diets. LDL is driven more by diet composition and genetics, and it's the number doctors most often act on directly.
More comparisons
One value tells half the story.
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