It is used topically as an astringent and skin protector, very often together with small amounts of Ferric Oxide to form Calamine (see specific info). It is a product compatible with breastfeeding according to WHO Essential Medicine’s List - 2002.It is also used in dental hygiene products and cosmetics. Because of the small dose used and poor absorption into plasma of most topical dermatological preparations, excretion into breastmilk in significant amount appears to be unlikely. Do not apply on the breast to prevent infant ingestion; otherwise, wash it off thoroughly with water before the next breast feed.