K salt

1.K overview
       Elements content in human body for K is ranking the third for Ca and P. The normal K content in human body is 2g/kg weight and only 2% of them exists in extracellular fluid in the form of ion, 98% in cells in the form of ion and its conjunction which is the major cation in intracellular fluid. Dietary potassium absorption rate is about 90%, the absorption function often takes place in small intestine. Although there is large amounts of K in digestive juice, but it was usually re-absorbed.
2.K main physical function
       K is very important for normal osmotic pressure of intracellular and extracellular fluid and acid-base balance of body fluids. A certain concentration of Ca, Mg, K and Na ion is essential for the normal irritability of nerve cells and muscle. The normal metabolism of protein and carbohydrate depends on the normal concentration of K and Na. The suitable plasma K concentration can keep the coordination of myocardial contraction.
 
3.K deficiency
       K deficiency is rarely caused by diet but mostly due to diarrhea, vomiting, sweating and continuous taking of furosemide. K deficiency can cause arrhythmia, muscle weakness, paralysis and other symptoms.
 
4.K demand and supply
       China dietary potassium intake amount(AI) is: 1500mg/d for 4-11 years old, 2000mg/d for 14 years above youngest and adult and 2500mg/d for pregnant and lactating women.
 
5.K dietary origin
       Potassium is widely distributed in foods and fruits, vegetables, lean meat, poultry, fish are good sources of K.