Paul Saladino· MD
But sardines, not a lot of mercury. They're very high in arsenic though. There's actually a study from Brazil that tested 120 samples of sardines and declared all of them unfit for chronic consumption due to exceeding the limits of arsenic. But there's an asterisk here. The arsenic in sardines is organic arsenic. It's arsenobetane, which the human body can filter out more easily than inorganic arsenic.