Eating coarse grains every day reduces the risk of hypertension by 4%. Lowering 4% doesn't sound good, but high blood pressure can lead to heart attacks, strokes and many other health problems. Therefore, every small step contributes to health. Coarse grains contain a variety of trace elements and plant cellulose needed by human body, such as chromium and manganese, which are the highest in whole grains, beans and nuts. If rats and rabbits are fed with feed lacking these two elements, animals are prone to arteriosclerosis. Plant cellulose can increase the excretion of cholesterol and reduce the content of cholesterol in blood. In addition to these foods, there are usually kiwi fruit, Chinese cabbage, propolis, ginseng, kelp, fungus and other foods that are good for blood health.