Safety in Lactation: Minerals

Maternal mineral supplements pose no risk to breastfed infants when taken in normal doses, although their use should be unnecessary unless the mother’s nutritional status indicates a mineral deficiency.
Lanthanum and sevelamer are used as phosphate binders and have negligible absorption by the mother. They carry a theoretical risk of reducing maternal vitamin absorption and hence reducing vitamin levels, especially fat-soluble vitamins (A and D), in milk.