The concentration of K+ ions in the human body is 4 mmol/L in the extracellular fluid and 160 mmol/L in the intracellular fluid. In a healthy body this concentration is always liquid. When consuming different types of fruits, more K+ ions enter the body than required. Excess K+ ions are removed from the body through urine and feces. As a result, the balance of potassium ions in the body is maintained.