Sign up for CNN’s Eat, But Better: Mediterranean Style. Our eight-part guide shows you a delicious expert-backed eating lifestyle that will boost your health for life . CNN  —  Sugary drinks may leave a sour taste given their possible impact on mortality, according to a new study. “This is a public health crisis, requiring urgent action,” said the study’s senior author, Dr. Dariush Mozaffarian, a cardiologist and director of the Food is Medicine Institute at Tufts University. The study,