The lipoprotein particle that carries cholesterol from the liver through the bloodstream to cells and tissues, abbreviated LDL. Often called bad cholesterol, elevated LDL levels drive the deposition of cholesterol in artery walls, promoting atherosclerosis and increasing the risk of heart attacks and strokes. Diet influences LDL: saturated and trans fats raise it, while unsaturated fats, soluble fibre, and plant sterols help lower it. Blood tests report LDL cholesterol as a key cardiovascular risk marker, and guidelines set target levels according to overall risk. Lifestyle measures come first in management, with statin medication used when diet and exercise are insufficient.