Sweet potato tuber contains 60%-80% water, 10%-30% starch, about 5% sugar and a small amount of protein, oil, cellulose, hemicellulose, pectin and ash.

If 2.5 kg of fresh sweet potato is converted into 0.5 kg of grain, the content of protein and carbohydrate is higher than that of rice and flour except fat.

Moreover, the composition of protein in sweet potato is reasonable, and the content of essential amino acids is high, especially lysine, which is relatively lacking in cereals, is high in sweet potato.

In addition, sweet potato is rich in vitamins (carotene, vitamins A, B, C and E), and its starch is easily absorbed by the human body.

Extended data

Sweet potato (English: sweet potato), scientific name: Ipomoea batatas (L.) Lam. ), also known as sweet potato, red taro, sweet potato, sweet potato, sweet potato, sweet potato, sweet potato (north), sweet potato (local multi-language), sweet potato, sweet potato, sweet potato.

Sweet potato belongs to the family Convolvulaceae of the genus Panicum, which is more than 2 meters long and lies on the ground. Its leaves are usually wide oval, 4- 13 cm long and 3- 13 cm wide. Corolla pink, white, lavender or purple, bell-shaped or funnel-shaped, 3-4 cm long, and capsule ovoid or oblate.

Sweet potato is rich in protein, starch, pectin, cellulose, amino acids, vitamins and various minerals, and has the reputation of "longevity food". The sugar content reached 15%-20%. Has anticancer, heart protecting, emphysema and diabetes preventing, and weight reducing effects. Li Shizhen's Compendium of Materia Medica in Ming Dynasty recorded that "sweet potato can tonify deficiency, strengthen spleen and stimulate appetite, and strengthen kidney yin", and said that people in the sea can eat for a long time. Chinese medicine regards sweet potato as a good medicine.

reference data

Baidu encyclopedia-sweet potato