The sea water is cold and icy, and the kelp grown here has strong cold resistance. Kelp is cold and salty, and enters the liver, stomach and kidney meridians, which can resolve phlegm, soften hard mass, clear away heat and promote diuresis, relieve cough and asthma, reduce blood fat and blood pressure, dissipate stagnation and fight cancer. Therefore, eating kelp in winter can increase the cold resistance of human body.

In addition, people's fear of cold is related to less intake of certain minerals. For example, the content of calcium in human body can directly affect the elasticity and excitability of myocardium, blood vessels and muscles; Iron deficiency in blood usually manifests as low fever and low body temperature. Therefore, supplementing foods rich in calcium and iron can improve the body's ability to keep out the cold. Kelp is a treasure house for human beings to absorb calcium and iron.

Extended data:

Matters needing attention in eating kelp:

1. Don't drink tea or eat fruit immediately after eating kelp.

Don't drink tea or eat some sour fruits immediately after eating kelp, because kelp is rich in iron, and the above two foods have been proved to hinder the absorption of iron in the body.

2. Don't eat kelp as a staple food.

Kelp can be eaten for a long time, but it cannot be eaten as a staple food. If so, the human body will consume too much iodine, which is particularly unfavorable to health. Moreover, kelp contains a lot of arsenic, which has proved that excessive arsenic intake can lead to poisoning. Therefore, before eating kelp, rinse it with clear water to make arsenic soluble in water, which is most suitable for eating.

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