Sweet potato contains more mucin, mucin mixture is a kind of polysaccharide and protein, collagen and saccharide, patients can reduce fatigue, improve human immunity, promote cholesterol excretion, maintaining arterial elasticity, prevent hardening of the arteries, and reduce the occurrence of hypertension and other cardiovascular diseases. Eat fresh sweet potato can reduce plasma lipid concentrations, beneficial to prevent hyperlipidemia and atherosclerosis