Diet Soda's Dark Side: Heart Attacks, Strokes But more research needed, some caution By Evann Gastaldo, Newser Staff Posted Feb 10, 2011 9:13 AM CST Updated Feb 13, 2011 5:48 PM CST 45 comments Comments In this April 27, 2010 file photo, Diet Cokes sit in an ice chest in a Hallendale, Fla. park. (AP Photo/J Pat Carter, file) (Newser) – The well-documented evils of soda have led many people to switch to diet—but even that could be bad for your health, a new study suggests. About 2,500 adults in the New York area were studied for almost 10 years, and those who drank diet soda every day had a 48% higher risk of stroke or heart attack than those who drank no soda at all. Oddly, those who drank both diet and regular soda weren’t found to have any significant differences in risk. One doctor says the findings should be “a wake-up call to pay attention to diet sodas,” but a lead researcher cautions that this study is “too preliminary to suggest any dietary advice” and that more research is called for. Doctors have no chemical or biological explanation for why diet soda may be risky. The study accounted for other risk factors including high blood pressure, smoking, waistline size, and more, and did not see a change in the risk, the AP reports. The American Beverage Association notes, however, that the study failed to adjust for a family history of stroke. Click for more reasons you should skip sugar-free treats ... or an opposing viewpoint on why you shouldn't worry.