A large observational study  by French researchers in BMJ July 10 documents an association between the consumption of sugar-sweetened drinks and fruit juices and the development of cancer.

The study tracked 101,257 people, average age 42. Over nine years, there were 2,193 first cases of cancer, including 693 cases of breast cancer, 291 of prostate cancer and 166 of colorectal cancer. Compared with the lowest one-quarter for sugary drink consumption, the highest one-quarter had a 30 percent higher risk for any cancer, and a 37 percent higher risk for breast cancer.