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钾是生命活动所必需的无机盐之一,人体全身含钾约140-150克(另有文献指出正常人体含钾量约为20毫克/公斤体重),是体内所含无机盐中含量较多的,位居第三。钾主要存于细胞内,约占98%,其它存在于细胞外。人体摄入钾主要来自食物。成人每日从膳食中应摄入的钾为2.4～4克;儿童为20～120毫克/公斤体重。摄入的钾大部分由小肠吸收,吸收率为90%。
Potassium is one of the inorganic salts necessary for life activities. The whole body contains about 140-150 grams of potassium (another reference indicates that the normal human body potassium content is about 20 mg / kg body weight), which contains more inorganic salts in the body In third place. Potassium is mainly found in the cells, accounting for about 98%, the other exists in the extracellular. Human intake of potassium mainly from food. Adult daily intake of potassium from the diet should be 2.4 to 4 grams; children 20 to 120 mg / kg body weight. Most of the intake of potassium absorbed by the small intestine, the absorption rate of 90%.