Potato-based foods are highly nutritious, and cooking methods are very important.

Root and tuber crops, including sweet potatoes, cassava, potatoes, Chinese yams, and taro, are an important part of the Chinese diet. Besides providing abundant carbohydrates, they are also rich in dietary fiber, minerals, and vitamins, with a particularly high content of potassium. Fresh tubers contain a significant amount of vitamin C, serving a dual role similar to both grains and vegetables.

Although the protein content in tubers is not high, it is a complete protein and a type of mucoprotein. It helps prevent the atrophy of connective tissue in the liver and kidneys and maintains the elasticity of blood vessel walls. When tubers are used in combination with other grains, they can provide complementary nutrition and improve the nutritional value of the protein.

Corn, Chinese Yam, and Water Chestnut Cake

Potatoes have the effects of harmonizing the stomach, strengthening the spleen, and replenishing Qi. They can help prevent and treat diseases such as gastric ulcers, chronic gastritis, habitual constipation, and skin eczema, and also have detoxifying and anti-inflammatory effects. In addition to the cancer-preventing effects of its vitamin C and carotene, sweet potatoes also contain a chemical substance called dehydroepiandrosterone (DHEA), which has the effect of delaying aging and prolonging life. The mucoprotein in sweet potatoes belongs to the collagen and mucopolysaccharide category and has a special protective effect on the mucous membranes of the digestive, respiratory, and urinary systems, thereby enhancing the body's immune function. Chinese yams contain substances such as amylase and polyphenol oxidase, which are beneficial to the digestive and absorption functions of the spleen and stomach, making it a medicinal and edible product that gently tonifies the spleen and stomach. Modern pharmacology has found that Chinese yams can lower blood sugar and enhance immune function.

To ensure their nutritional value, the cooking methods for tubers are crucial. Boiling or making soups allows for the best absorption of nutrients. However, if fried processing methods are used, a large amount of vitamins will be lost, and the fat and energy content will double.