It is best not to put seaweed soup in the refrigerator every other day, because seaweed soup contains a lot of nitrate, and after a period of time, it will be oxidized by air and bacteria to produce toxic nitrite.

Seaweed soup is a dish, mainly made of kelp, sesame oil, pepper, soybean oil, salt and so on. High nutritional value, rich in carbohydrates, protein, zinc, dietary fiber, sodium, potassium, calcium, selenium and vitamins.

Kelp is a large perennial edible algae, and its sporophyte is large and brown and flat. It is divided into leaves, stalks and fixators, and the fixators are in the shape of pseudoroots; The leaf is composed of epidermis, cortex and marrow, and there are sporangia in the lower part of the leaf. It has a mucus cavity, which can secrete slippery substances, and a tree-like branch with a fixer, which is used to attach rocks on the seabed and grow in seawater with low water temperature.