Students chowing down tuna in dining halls are unaware of mercury exposure risks

Some students are helping themselves to servings of tuna well beyond the amounts recommended to avoid consuming too much mercury. Researchers surveyed students on their tuna consumption habits and knowledge of mercury exposure risks, and also measured the mercury levels in hair samples. Hair mercury levels were closely correlated with how much tuna the students said they ate. And for some, the measurements were above what is considered a 'level of concern.'