Which groups are advised to be particularly mindful of mercury exposure from fish?

Pregnant women, women trying to conceive, and young children.

A significant concern associated with frequent fish consumption is the potential accumulation of environmental contaminants, chiefly mercury, which bioaccumulates up the food chain, often being higher in larger, longer-lived predatory species. Because mercury exposure relates primarily to the developing nervous system, specific demographic groups are strongly advised to exercise caution regarding their fish choices. This group includes pregnant women, women who are actively trying to conceive, and young children, due to the potential impact on nervous system development. For these groups, careful selection between lower-mercury options, like sardines or herring, and those to limit, is essential to balance nutritional gain against potential risk.