Eating celery at night and turning on the light all night will get a tan?

Celery contains a substance called "furan coumarin", the most famous of which is called "psoralen". This substance can directly penetrate cells and reach DNA. Usually, just stay there until it is finally cleared. However, under the irradiation of sunlight (mainly ultraviolet rays), they will combine with DNA, thus making DNA lose its replication ability. "Furcoumarin" is a small molecular substance. Celery is cooked and can't be destroyed. It can be absorbed directly without digestion and then transported to the skin with the blood, but this does not mean that celery will turn black in summer.

Celery is a vegetable with more photosensitive substances, and its content is related to varieties and planting conditions. If there is no threat of disease, it will produce little or no.

Swiss scientists published a study in 199 1. Each of the four volunteers ate 300 grams of celery root with coumarin content of 28.2 mg per kilogram, and then irradiated with ultraviolet rays. No adverse reactions were observed.

So, it doesn't matter.