How can the concentration of LDLs and HDLs increase risk of heart disease?

Excess LDL can result in plaque build up on arterial walls, leading to clogged arteries and eventually heart attacks and strokes. A low concentration of HDL is also bad for the circulatory system because they are needed to remove cholesterol from the bloodstream and prevent clogging. HDL levels should be above 50mg/dL and LDL levels should be below 100mg/dL.

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