1. Purple sweet potato can prevent cancer, and its rich selenium and iron are essential elements for anti-fatigue, anti-aging and blood-enriching, especially selenium is called "the king of cancer". Black rice has the effects of nourishing yin and tonifying kidney, invigorating spleen and warming liver, invigorating spleen and regulating stomach, invigorating qi and promoting blood circulation, nourishing liver and improving eyesight.

2. Purple sweet potato can promote gastrointestinal peristalsis, and its rich cellulose can promote gastrointestinal peristalsis, clean up mucus, gas accumulation and corruption in intestinal cavity, discharge toxic substances and carcinogens in feces, keep defecation unobstructed, improve digestive environment and prevent gastrointestinal diseases.

3. Eating more purple potatoes is beneficial to lose weight, and it is a good low-fat and low-calorie food, and at the same time it can effectively prevent sugar from turning into fat, which is conducive to losing weight and bodybuilding.

4, regular consumption of black rice, is conducive to the prevention and treatment of dizziness, anemia, white hair, eye diseases, waist and knees weakness, lung dryness and cough, constipation, urination, kidney deficiency and edema, loss of appetite, spleen and stomach weakness and other symptoms. Has the effects of controlling blood pressure, reducing cardiovascular and cerebrovascular diseases, and resisting aging.