Will celery turn black during the day? What is the daily food

Some people say that celery will turn black when eaten in the daytime, because celery is a sensitive food, and it's better to eat it at night. Can celery be eaten in the daytime and turn black? In fact, we don't eat too much in the daytime, so we don't have to pay attention to this problem. So what are the sensitive foods in our daily life?

Can celery be eaten in the daytime? Will it turn black? Celery can be eaten in the daytime. There is no scientific basis for the so-called celery that is light-sensitive food and cannot be eaten in the daytime spread on the Internet

Some plants, such as celery, produce furanocoumarins, the most famous of which is psoralen. The substance can penetrate the cell directly to the DNA. Normally, it just stays there until it's finally cleared. But when exposed to sunlight (mainly ultraviolet light), they bind to DNA, making it unable to replicate. Furanocoumarin is a small molecule substance, which can not be destroyed by cooking, and can be directly absorbed without digestion, and then transported to the skin with the blood, but this does not mean that eating celery in summer will turn black.

studies show that celery is one of the vegetables with more photosensitive substances, but its content is mainly related to the planting conditions as well as the varieties. If there is no disease threat, there will be little or no disease. In Canada, 2.88 mg of celery was detected, with the highest detection rate of 1.88 mg per sample. Swiss scientists published a study in 1991. Four volunteers each ate 300 grams of celery root containing 28.2 mg Furanocoumarin per kilogram, and then exposed to ultraviolet light. No adverse reactions were observed.

Therefore, for most people, eating a few hundred grams of celery is not enough to damage the skin by ultraviolet radiation. But if you happen to encounter 'sick' celery, or skin allergic to sunlight, it needs to be another matter.

Is celery good to eat in the day or at night? Celery can be eaten in the day or at night.

Photosensitive food is the food that is easy to cause solar dermatitis. Photosensitive reaction is eating photosensitive food after digestion and absorption, photosensitive substances into the skin, if a long time by strong ultraviolet radiation, will react with the sun, and then cause the bare part of the skin: red, swelling, pain, rash and other dermatitis symptoms, and then solar dermatitis. There are indeed skin cases caused by eating and sunbathing in our life, but it is generally caused by people with allergic constitution, not by sunbathing after eating photosensitive food.

The daily common photosensitive foods are: vegetables and wild vegetables with high chlorophyll content and strong smell: Parsley, celery, fennel, leek, purslane, Malan head, sauerkraut, lettuce, radish leaf, spinach, rape, shepherd's purse, amaranth, gray vegetables, etc. Fruits: lemon, fig, orange, lemon, mango, pineapple, etc. Seafood: snails, crabs, mussels. The reason why these foods can cause solar dermatitis and darken the skin is that they all contain an ingredient - Furanocoumarin, which is a natural photosensitizer. This ingredient itself will not cause damage to the skin, but it will increase the photosensitivity of human skin. If they are exposed to strong ultraviolet UVA radiation for a long time, they will produce photosensitive reaction and make melanocytes live The increase in stress can lead to skin tanning or sunburn.