The main electrolytes are sodium, potassium, chloride, magnesium, calcium, and phosphate. The body tightly regulates their concentrations in blood and cells; kidneys and hormones adjust excretion continuously.
Sodium is the primary extracellular electrolyte and governs fluid balance — most people in India and worldwide consume well above the WHO-recommended 2,000 mg/day, raising blood pressure risk. Potassium counterbalances sodium’s effect on blood pressure; fruit, vegetables, legumes, and dairy are good sources.
Electrolytes are lost through sweat, which matters during prolonged exercise or heat exposure. For most people eating a balanced diet, ordinary food and water restore electrolytes adequately. Sports drinks are rarely needed for sessions under 60–75 minutes. People with kidney disease, heart failure, or those on certain medications should discuss electrolyte management with their clinician.