It is not necessarily harmful to stir-fry oil wheat vegetables and make them bitter. If you buy an oily wheat dish that is not very mature, it will easily produce a bitter taste after cooking.

If the sun does not shine for a long time in the whole process of growth and development, it will also be bitter.

If the air pollution in the growth and development is serious, oil wheat vegetables will suffer from the influence of environmental pollutants in the whole process of growth and development, and they will also suffer.

When buying oil wheat vegetables, try to choose the ones that look tender in color. Some oil wheat vegetables will taste bitter because they are exposed to enough sunlight when planting.