To put it simply, fresh potatoes contain energy components: starch 9-20%, protein1.5-2.3%, fat 0.1~1.1%and crude fiber 0.6-0.8%. In detail: potato has high nutritional value and medicinal value. Generally, fresh potato contains 9-20% starch, 0/.5-2.3% protein, 0.1~1%fat and 0.6-0.8% crude fiber.

The nutrients contained in 100g potato are: heat 66 ~113j, calcium1~ 60mg, phosphorus15 ~ 68mg, iron 0.4～4.8mg and sulfur.

In addition, potato tubers also contain carotene and ascorbic acid that cereals do not have. There are various organic acids in potato tuber, among which citric acid is the most, accounting for about 0.79% of dry matter weight, followed by malic acid, accounting for about 0.45% of dry matter weight. Although the content of succinic acid, oxaloacetic acid and other organic acids is small