News in Brief Health & Medicine Mediterranean diet may offset genetic risk for stroke Compared to a low-fat diet, eating fish and olive oil improved health By Tina Hesman Saey August 12, 2013 at 5:43 pm - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Print (Opens in new window) Print Eating a fish-rich diet may help counteract some bad effects of having a genetic variant linked to diabetes, a new study suggests. A common variation of the gene called TCF7L2 has been linked to higher risk of type 2 diabetes.