Because the content of photosensitive substances in purple Sophora japonica is higher than that in white Sophora japonica, people with sensitive skin may have allergic symptoms when eating purple Sophora japonica, and it is also easy to bring about the misunderstanding that purple Sophora japonica is toxic. So fewer people eat.

All kinds of Sophora japonica contain a component that can decompose photosensitive substances in the human body. The skin of the exposed face, hands, feet and other parts of the human body may cause metabolic disorders after direct sunlight, which may lead to' solar dermatitis'. Nowadays, purple Sophora japonica also appears in people's field of vision, and both kinds of Sophora japonica are waiting for the public to choose, but different colors will bring different taste buds or hide some health threat.

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There is a legend about Sophora japonica. According to legend, a long time ago, a plague spread on the land where human beings lived, and many people were infected with the disease in a few days. There is no medicine in the world. When the Queen Mother learned of this, she sent the Sophora flower fairy to come down to save mankind in one night.

The next morning, when people opened the door, a refreshing fragrance came to their faces, and people suddenly felt refreshed and sick. In order to prevent the plague from harming the world, the Sophora japonica fairy turned into a Sophora japonica tree and guarded it in front of the courtyard. Whenever summer comes and flowers are in full bloom, people pick Sophora japonica flowers and eat them, and the plague is completely eliminated.