Eating foods with plant sterols—like fortified margarine or nuts—helps lower your 'bad' cholesterol because they block your gut from absorbing too much cholesterol, so your liver makes more receptors to clean up the leftover cholesterol in your blood.

This study found that eating foods with added plant sterols (like fortified margarine) lowers bad cholesterol, which matches what the claim says. It doesn’t prove exactly how it works in the liver, but the result—less cholesterol in the blood—supports the idea.

This study gave hamsters a special form of plant-based cholesterol blockers and found that their bad cholesterol (LDL) went down — just like the claim says it should.