24 Sep 2018 --- A new report by Cancer Research UK has put forward that obesity will overtake smoking as the biggest preventable cause of cancer among UK women in 25 years’ time. According to the report, by 2035, 10 percent of cancers in women (around 25,000 cases) could be caused by smoking and 9 percent (around 23,000 cases) by excess weight. If trends continue as projected, excess weight could cause even more cases of cancer than smoking in women by 2043.