Lotus root and fresh lotus root are rich in trace elements such as copper, iron, potassium, zinc, magnesium and manganese. In tuber food, the iron content of lotus root is high, so people with iron deficiency anemia are most suitable to eat lotus root. A variety of trace elements in lotus root are beneficial to the production of red blood cells and maintain the normal work of muscles and nerves. In addition, these nutrients also help to secrete digestive enzymes and improve digestion.

2. Chinese yam has the functions of "hearing and improving eyesight" and "not starving and prolonging life" in Chinese medicine, which is very beneficial to human health. It is also circulated among the people that Chinese yam has remarkable effects on conditioning physiological ability, physical weakness after illness, postpartum aftercare for women, and strong physique for children, so it is called "taking medicine".

3, water chestnut, "water chestnut crisp in August." Eleocharis tuberosa is nutritious, rich in starch, protein, glucose, unsaturated fatty acids and vitamins, easy to digest and absorb, and has the effects of invigorating spleen, nourishing stomach, tonifying kidney and nourishing blood. The ancients believed that eating more water chestnuts can tonify the five internal organs, eliminate all diseases and make people keep fit. The so-called Homo sapiens has the function of losing weight and keeping fit.