Frequent groceries prevent heat diseases such as flu, diarrhoea, hepatitis, diabetes, cancer, kidneyitis, rheumatism, chronic bronchitis, hypertension, etc. 2. The frequent consumption of groceries prevents cardiovascular diseases. Coarse grains can facilitate the discharge of cholesterol, and prevent, assist and treat diseases such as hypertension and the hardening of artery. 3. The role of groceries in combating diabetes. Coarse grains also contain starch, but they do not raise blood sugar after eating coarse grains because rough cell walls are not easily destroyed by humans. 4. The role of groceries is to treat constipation. The grocer tissues contain more dietary cellulose, which is metabolismed to promote intestines。