盐是调味品,不含三大营养素、维生素、胆固醇和膳食纤维。它含有较丰富的微量元素,尤其钠、钾含量较高。盐是人体不可缺少的物质,摄入量不足时易引起食欲不振、怠倦无力,影响人体健康。但如长期过多摄入则会导致血压升高、动脉硬化、心肌梗死,加重肾脏负担和引起水肿的发生。这是已为国内外医学研究试验所证 Salt is condiment, does not contain the three major nutrients, vitamins, cholesterol and dietary fiber. It contains rich trace elements, especially sodium, potassium content is higher. Salt is an indispensable substance of the human body, insufficient intake easily lead to loss of appetite, weakness, affect human health. However, if the intake of long-term excessive lead to high blood pressure, arteriosclerosis, myocardial infarction, increase the burden on the kidneys and cause edema. This is evidenced by domestic and international medical research trials