Hello, broccoli is not only a nutritious vegetable, but also a healthy vegetable. Broccoli turns yellow because it can't turn green without light and chlorophyll, so it is yellow, so it is not fresh, and the vitamins and minerals that keep the color are lost. So broccoli turns yellow, so it's best not to eat it.

Preservation method of broccoli: wrap broccoli with paper or breathable film (you can spray a small amount of water on the paper), and then put it upright in the freezer, which can keep fresh for about 1 week.