The Institute for Agriculture and Trade Policy, a Minnesota-based nonprofit, recently conducted a study of off-the-shelf corn syrup and found that almost half of the samples that they tested contain mercury. One third of the HFCS-bearing packaged food and drinks that they tested contained the poison. The use of mercury-contaminated caustic soda is apparently common in the manufacture of HFCS, which would explain its presence. The corn syrup industry disputes the study (which has not been peer-reviewed), saying that plants don’t use mercury anymore, but the authors of the study say that plants in Georgia, Tennessee, Ohio, and West Virginia surely do.
I’ve lamented corn syrup here before. I’m not aware of any studies that demonstrate that it’s any worse for you than sugar (up until now), but I just think the stuff is trouble. There’s some confirmation bias going on here, but I’m glad to see some evidence appearing that supports my “HFCS == trouble” theory.