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What Sugary Sodas Can Do to Your Kidneys

A study from Japan suggests sweetened sodas increase the risk of kidney diseaseA study from Japan suggests another reason to avoid sweetened sodas: an increased risk of kidney disease. More than 12,000 employees at a Japanese university had their urine tested for the presence of protein as part of their annual check-ups. Protein in the urine can be an early – but reversible – indication of kidney damage. The researchers found that nearly 11 percent of the employees who reported drinking two or more soft drinks daily had protein in their urine during three years of follow up. By comparison, protein was found in the urine of just 8.4 percent of the employees who drank no sodas, and in about 9 percent of those who reported drinking about one can per day. In addition to kidney disease, protein in the urine can also be a very early indication of heart disease, stroke and heart failure. The study results were presented on November 9, 2013 at the annual meeting of the American Society of Nephrology. An earlier study, published in 2007, found that drinking two or more colas a day - diet or regular - was linked to twice the normal risk of chronic kidney disease. The same risk was not observed for carbonated beverages other than colas.

T.M. Saldana et al, “Carbonated beverages and chronic kidney disease,” Epidemiology, July 2007