Because the particularly fresh and tender rape is not mature and there are pesticide residues. Rape, also known as oil cabbage, is the tender stem and leaf of cruciferous plant rape. Its color is dark green, like cabbage. It belongs to cruciferous cabbage variety. Rape contains a variety of nutrients and is rich in vitamin C. Why can't you choose particularly fresh and tender rape? If you see particularly fresh and tender rape in the market, you'd better not buy it, because most of the vegetable leaves now exceed the standard of pesticide residues. Before eating, be sure to soak more times and wash more times.
The cooking time should not be too long when eating rape. At the same time, pay attention not to cut the fresh and tender rape and put it for a long time.
Cooked rape should not be eaten after overnight. Because after food is stored for a period of time, nitrite will be produced, which is a harmful substance leading to gastric cancer. （TeBieXianNenDeYouCaiWeiShenMeBuNengShua）