Think zinc: Transient nutritional deficiency related to novel maternal SLC30A2 mutation potentially precipitated by antenatal proton pump inhibitor exposure.

A second-born breastfed infant presented with zinc deficiency. His mother had a novel heterozygous mutation in SLC30A2. A previous baby did not have zinc deficiency but the mother had taken a proton pump inhibitor (PPI) during the second pregnancy. Antenatal PPI exposure may plausibly contribute to transient infantile zinc deficiency.