[Effect of ion exchange resins on the composition of milk].

Pretreatment of milk with either sodium or calcium polystyrene sulfonate resins is useful in limiting potassium dietary intake in children with renal failure. We therefore studied the in vitro effects of Kayexalate and Calcium Sorbisterit on potassium, sodium and calcium concentrations in 3 standard formulas and in human milk. It is concluded that wide variations in the final potassium, sodium and calcium concentrations can be observed according to the resin but also to the formula.