A study published online recently in the journal Environmental Health Perspectives documented slightly elevated levels of arsenic in samples of chicken purchased at grocery stores in 10 cities in the U.S.
So how did trace amounts of this toxin end up in supermarket poultry?
Climate change is gradually altering the fish that end up on ice in seafood counters around the world, according to a new study.
"The composition of the [global] fish catch includes more and more fish from the warmer areas, and cold-water fish are getting more rare, because the temperatures are increasing," says Daniel Pauly at the University of British Columbia, a co-author of the study.
Americans are repeatedly told to cut back on salt to reduce the risk of heart disease. But there are new questions being raised about the possible risks of reducing sodium too much.
So, how low should we go? Currently, the government recommends that Americans should aim for 2,300 milligrams per day. And people older than 50, as well as those with high blood pressure, diabetes or kidney disease are advised to reduce sodium even further, down to 1,500 mg per day.