You can't drink seaweed soup overnight because kelp contains a lot of nitrate. After a night, it will be oxidized by air and bacteria to produce toxic and carcinogenic nitrite, which is harmful to the body. Not only is it best not to drink overnight soup, but many things in life are also best not to eat overnight. For example, overnight leafy vegetables, especially some leafy vegetables, will be decomposed into nitrite by bacteria overnight, and even heating can not remove this carcinogen.

It is best not to drink seaweed soup at night. According to scientific determination, some overnight vegetables, especially overnight green leafy vegetables, not only have low nutritional value, but also produce pathogenic nitrite. Although kelp is not a green leafy vegetable, it should be refrigerated and kept fresh, and try not to put it for too long. In the case of reasonable storage conditions, it is best to eat it on the same day as cooking, so that the nutrients are not lost and the food is fresh.