食盐是人们的生活必需品,其主要成分是氯化钠。氯化钠不仅是重要调味品,而且钠还是人体不可缺少的矿物质。一个成年人一般每天需摄入氯化钠5～8克。人体缺盐,轻则倦怠乏力,淡漠无神,起立时晕眩;重则恶心呕吐,痛性肌肉痉挛、水肿,血压下降;甚至木僵昏迷。为了保证人们从饮食中得到足够的矿物质,还必须在食盐中添加各种微量元素。这种食盐称为强化营养盐,因所含微量元素的不同,可以防治不同地区因水土中缺乏某种微量元素所造成的地方病。 Salt is one of the necessities of life, its main component is sodium chloride. Sodium chloride is not only an important condiment, but sodium is also an indispensable mineral of the body. An adult daily intake of sodium chloride 5 to 8 grams. The body of salt, ranging from fatigue, indifference, standing dizzy; heavy nausea and vomiting, painful muscle spasms, edema, blood pressure; and even stupor stupor. In order to ensure that people get enough minerals from their diet, they must also add trace elements to their salt. This kind of salt is called fortified nutrient salt. Due to the different trace elements contained, it can prevent endemic diseases caused by the lack of trace elements in soil and water in different areas.