We've all heard warnings about the toxic chemical mercury being found in some kinds of fresh fish. Now Consumer Reports' tests have found the mercury in canned tuna could pose a risk for some. Consumer Reports just tested dozens of tuna cans and pouches for mercury.
Studies suggest that even low levels of mercury can harm a developing brain.
Based on guidelines set by the Environmental Protection Agency, testers found cause for concern. Considering the large amount of canned tuna that's eaten, we found levels of mercury high enough to pose a risk to one vulnerable group. Testers also found the amount of mercury varied, depending on the tuna type, whether it was white tuna or light tuna. The levels of mercury in the white tuna were almost twice as high as the light tuna. That may be because the light tuna is smaller and ingested less mercury.