Too much bad cholesterol in the blood clogs arteries and can cause heart attacks.

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Evidence from Studies

Supporting (2)

Community contributions welcome

LDL atherogenicity determined by size, density, oxidation, apolipoprotein(a), and electronegativity: an updated review

Narrative Review

2025

This study shows that when there’s too much of certain types of 'bad cholesterol' (LDL), especially when they’re small, sticky, or damaged, they get stuck in artery walls and cause dangerous buildups—exactly what the claim says.

LDL Cholesterol and Cardiovascular Events in a Population Network: One More Twist of an Endless Story

Narrative Review

Human

2024 Feb 15

This study shows that lowering 'bad' cholesterol (LDL) with medicine reduces heart attacks and strokes, which means high LDL really does contribute to clogged arteries—just like the claim says.

Contradicting (0)

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No contradicting evidence found

Similar Assertions

When you have too much 'bad' cholesterol (LDL) in your blood, it sticks to the walls of your arteries and builds up like gunk, making them narrow and stiff — which raises your chance of having a heart attack or stroke.

93%

If you're a middle-aged person with symptoms, having higher 'bad' cholesterol (LDL) means you're more likely to have heart problems over the next four years — but only if scans show you already have plaque in your heart arteries.

82%

High cholesterol might not be the main reason for heart disease, and having too little cholesterol could actually be risky — so the old idea that cholesterol causes heart problems might not tell the whole story, especially for preventing heart issues in healthy people.

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People with higher levels of 'bad' cholesterol in their blood are more likely to have heart attacks or other heart problems.

81%

If healthy adults have higher 'bad' cholesterol levels, they’re more likely to show early signs of artery hardening, like thicker artery walls or plaque buildup in the neck arteries.

79%