For cancer prevention, the WCRF also said to avoid alcohol completely.
Over 18 years of follow-up, almost 10,000 women developed obesity-related cancers, da Silva's team found.
The report Diet, Nutrition, Physical Activity and Cancer: a Global Perspective examines a decade of research linking cancer prevention to diet and lifestyle, and is the third to address the subject. The team then analysed this to determine BMI, weight change over a 6-year period, and the subsequent risk of obesity-related cancers defined as cancer of the breast (postmenopausal), colon-rectum, endometrium, ovary, pancreas, kidney, gallbladder, gastric cardia, liver, oesophagus (adenocarcinoma), meningioma, thyroid, and multiple myeloma. The new research, to be presented Thursday at the European Congress on Obesity in Vienna, Austria, also found that people who underwent weight-loss surgery saw their risk of skin cancer in general decline by 42%. Conversely, high-fiber, plant-based foods like grains, legumes, fruits, and vegetables can all protect against the risk of all forms of cancer caused by meat and can even protect against breast cancer. In a Norwegian study that tracked 137,205 women between 30 and 70 years old, researchers also found that those who gained more than 22 pounds over a period of five to eight years were almost twice as likely as those who maintained a stable weight to develop pancreatic cancer.
The analysis dovetails with a new study by the Arctic University of Norway that looked specifically for the risks of obesity-related cancers. It was accompanied by the Cancer Health Check tool, which offers personalized recommendations for how to prevent the disease. The WCRF recommends reducing the intake of food high in fat, starches, and sugars.
"We are making for the first time separate recommendations on sugar-sweetened drinks and the recommendation is to drink water and unsweetened drinks and to limit consumption of fast foods and other processed foods", said WCRF director of research Dr. Giota Mitrou, as cited by the Mirror.
They discovered that one in six deaths worldwide is due to cancer. "Our cancer prevention recommendations work together as a blueprint to beat cancer that people can trust, because they are based on evidence that has now proved consistent for decades".
'There is no level of consumption below which there is no increase in the risk of at least some cancers, ' the authors said.
"Rather, different patterns of diet and physical activity combine to create a metabolic state that is more, or less, conducive to cancer". But it also reduces the risk of many other cancers because it helps people to maintain a healthy weight.
"The Government now has an opportunity to step up and publish a truly world leading obesity plan with strong measures to curb the influence of junk food marketing".