Potassium requirements

Physiology:

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