Even if it does not deteriorate, the nutrients in it will be lost, and the vitamins in the food will be reduced day by day. Kelp contains quite a few vitamins.

The food in the refrigerator can't be preserved for a long time, but it can only prolong the shelf life of the food, because there are many low-temperature resistant bacteria in the refrigerator, and low temperature can only inhibit the respiration of the food. If the nutritional value of food is not lost, it is best to buy and cook it often.

This soup is originally the effect of clearing heat and relieving summer heat, and clearing liver and reducing fire in summer. It is best not to drink it for too long.