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Electrolyte balance refers to the physiological regulation of the concentrations of various salts, or electrolytes, within the body's fluids. These electrolytes, such as sodium, potassium, chloride, calcium, magnesium, and phosphate, are crucial for numerous bodily functions.12

The body's fluids are divided into intracellular fluid (within cells) and extracellular fluid (outside cells). Extracellular fluid includes plasma, the liquid component of blood, which transports nutrients, waste products, and heat, and plays a role in maintaining blood pressure and homeostasis.34

The kidneys are vital in maintaining electrolyte and water equilibrium. They filter blood, reabsorb essential substances, and excrete waste products, thereby regulating water content, acid-base balance, and osmotic pressure. This intricate system ensures that electrolyte concentrations remain within narrow, life-sustaining limits, preventing serious health issues like dehydration or cell damage.512

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