If your kids buy lunch at school – there is one popular sandwich they might want to skip...

Does your child opt for the tuna sandwich from the school cafeteria? 

If so, they should only choose that about twice a month. A new report from the Center for Science in the Public Interest says school lunch tuna tends to have higher Mercury levels than the average reported FDA levels. 

Ned Groth, an environmental health scientist, says kids who eat tuna frequently can easily get very high mercury doses. Children under 55 pounds should only have canned tuna once a month. Monitor what they eat at school so you can skip it at home if necessary.