Vegetables, which part is of most nutrients

Core Tip: In general, the different parts of the nutrition of the food is different, the vegetables can be divided into three categories of stems and root and fruit, in addition to the flowers and melons and vegetables.

Stem and leaf vegetable
Rape, leeks, cabbage, spinach, rich in vitamin C and carotene content. Spinach contains iron, but at the same time containing oxalic acid will hinder food calcium, iron absorption, so before cooking in boiling water slightly Cheuk.
Root vegetables
Radish, carrot, taro, potato, sweet potato. Radish contain a lot of vitamin C, carrots contain a lot of carotene, potatoes, taro starch-containing, high-calorie and other nutrition less. The common feature of root vegetables is rich in crude fiber. Radishes, carrots sliced ​​thin strips, place 1 to 2 days, crude fiber increased about three times. Radish foods are cut is to eat should not be cut after storage.
Fruit and vegetables
Tomatoes, beans, bell pepper, cucumber, sponge gourd, pumpkin and eggplant. These vegetables, beans, pumpkin, gourd, eggplant, best eaten raw, to avoid vitamin is destroyed during the cooking process. Tomatoes contain more lycopene and vitamin C. Beans, lentils, peas, soybeans, high protein content, amino acid composition than grain, such as calcium, phosphorus, iron, vitamin B1 content than other vegetables. Pumpkin containing carotene. Carotene and vitamin C rich chili.
With a vegetable in the nutritional content of the different parts of a difference, such as the light green part of green onions is much higher than the light blue part of the nutritional content. Light blue part of the vitamin A, vitamin B1 and vitamin C content is less than half of the light green part. With a celery, the deep green celery leaves than the pale green stems, stalks contain more vitamin A and vitamin C. There cabbage leaves part of the nutritional content of the dish stems.
The human need "all-round" nutrition, simply eat any kind of vegetables are impossible to meet this requirement, so the only reasonable, clever collocation, adhere to multi-species, multi-color in order to ensure that the nutritional balance.