Now, there's new evidence there's enough of it in canned tuna to cause concern. Dana DiMuro just loves canned tuna. Because she's expecting, DiMuro knows she has to be careful about what she eats. Doctors have been telling pregnant women to avoid some kinds of fish because they contain high levels of mercury. Dana says that no one has ever told her to stay away from tuna though.
Studies suggest that even a tiny little amount of mercury can harm a developing human brain.
So, when Consumer Reports tested dozens of cans and pouches of tuna recently, researchers found reason for concern. Testers also found the amount of mercury varied depending on the type of tuna, whether it was all white or chunk light. This doesn't mean Dana DiMuro and her youngest daughter have to stop eating tuna, just limit the amount. Women who are pregnant or nursing shouldn't have any more than one 6-ounce can of white tuna a week, to 2 cans of light tuna. And young kids should eat even less, just one tuna sandwich a week.