2. Purple sweet potato contains rare element selenium, which has the function of preventing and treating tumors.
3. Purple sweet potato is rich in cellulose, which can promote gastrointestinal peristalsis, help toxins excrete from the body, and reduce the occurrence of gastrointestinal diseases.
4. Purple sweet potato contains protein, various amino acids and trace elements, which can replenish energy and relieve fatigue.
5. Purple sweet potato is a low-fat and low-calorie food, which has the effect of slimming and losing weight.