Potassium and Magnesium in Breast Milk of a Woman With Gitelman Syndrome

Gitelman syndrome is an autosomal recessive tubulopathy leading to defects in the apical sodium chloride transporter in the distal convoluted tubule.1 This results in hypokalemia and metabolic alkalosis, often accompanied by hypomagnesemia.1 In pregnancy, hypokalemia and hypomagnesemia may aggravate because of maternal physiological changes and fetal demands.2