Study links diabetes to Great Lakes fish consumption

Scientists are still discovering the dangerous consequences of DDT, the pesticide that was finally restricted in the 1970s after years of worldwide use.

The latest findings show an association between diabetes and DDE. DDE is produced in some fish that eat DDT.

A 15-year study conducted by public health officials found people who regularly eat Great Lakes sports fish are more likely to have problems with diabetes. All of us have low levels of DDE in our systems because it’s found in so much food, but only high levels are thought to be dangerous.

The study focused on fishing boat captains and their spouses. While the use of DDT is no longer allowed in the U.S., it’s still used in some countries to combat malaria.

When it’s used, however, it doesn’t just affect a small area, according to Bruce Fowler of the Centers for Toxic Substances and Disease Registry.

“DDT gets thrown up in the atmosphere and can be deposited by rain and snow attached to particles which settle at the bottom of the lakes,” Fowler told the Chicago Tribune. “The toxins are released by Asia and settle in North America. The jet stream carries a lot of things besides temperature and rain.”

So although levels of DDT found in Americans has decreased over the years, it still can come from China and end up in Great Lakes fish – and consequently in those who eat them.

Another study, this one released in 2008, found chemicals like DDE enhance the association between diabetes and obesity. Other causes of diabetes are poor diet, older age, hypertension and family history.

Because of the threat of DDT in fish, many health departments advise against eating too much of it. One scientist said he suggests eating a variety of fish from different water sources. The study doesn’t suggest giving up fish altogether, because it can be part of a balanced diet.