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The major physiological role of potassium is in regulating muscle and nerve excitability. Potassium is not conserved by the body; the kidneys excrete about 40 mEq/L per 24 hours. Potassium is required for the synthesis of lean body tissue, about 3 mEq/g of nitrogen is needed for anabolism.
Empiric daily requirement
Adults: 60 to 200 mEq/day
Infants/children: 2 to 4 mEq/kg/day
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