Cholesterol Lipid Component of cell membrane Found in the diet – Eggs, dairy, liver High levels lead to development of CHD 2 types of cholesterol -carrying proteins Low-density Lipoproteins (LDL) - bad cholesterol High-density Lipoproteins (HDL) - good cholesterol LDL- carries up to 70% Blood cholesterol from liver to body cells As level of LDL increase, Level of CHD increases HDL- carries 20% Blood cholesterol HDL- gathers Cholesterol for eliminartion As level of HDL Increase, risk of CHD decrease

Risk of developing CHD may be predicted by measuring the ratio of HDL to LDL in the blood High ratio indicates HDL level in high and LDL low = healthy Low ratio= high LDL= unhealthy Some evidence states that exercise can increase HDL levels A fingerprick test can measure plasma cholesterol levels, but analysis of the HDL:LDL ratio must be done in a lab.