"This means that for those kids that you can, in school healthcare, catch and if you can change their trajectory during puberty you can do a lot for their risk of colon cancer".
It also states that even small amounts of alcohol can increase the risk.
The report also advises satisfying nutritional needs through diet alone, instead of counting on supplements.
And as more countries adopt Western lifestyles with sedentary living and obesity-causing foods, cancer rates are expected to spike 58% by 2035, causing 24 million global deaths per year, the researchers said.
The report also found that physical activity can help directly protect against three cancers - bowel, breast and womb. The WCRF points out that being overweight leads to 12 types of the disease, including cancers of the bowel, gallbladder, prostate, and stomach. It's a horrific disease that claims way too many lives, often of people who are in the prime of their life.
The analysis dovetails with a new study by the Arctic University of Norway that looked specifically for the risks of obesity-related cancers. However, there are few published studies in nationally representative populations of women on specific, obesity-related cancers, such as pancreatic and kidney cancer, in relation to prior weight change.
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In the report, the global non-profit association acknowledges that previous research has identified various foods (for example, processed meat) or components of food (like dietary fibre) that may increase or decrease the risk of cancer. However, the onus to prevent cancer does not exclusively lie with individuals, they stressed, urging governments to prioritize cancer prevention policies. It contains information on what positive steps people can take to reduce their risk (the "good news' is that there are things you can do to reduce your cancer risk) and shows that in most cases it isn't a single food or nutrient that makes a difference-there are no magic bullets-the important thing is what you eat and drink, your weight and how active you are through your lifetime". The non-profit cancer prevention research organization released its findings in its third expert report titled "Diet, Nutrition, Physical Activity, and Cancer: a Global Perspective", which researchers have dubbed the "blueprint" to beat the disease.
Caroline Cerny of the Obesity Health Alliance, a coalition of health organisations, said: "As this report shows, carrying excess weight can increase the risk of cancer".
Having a diet rich in whole grains, vegetables, fruit and beans can help prevent cancer while mothers are encouraged to breastfeed where possible to help reduce their risk of breast cancer.
People should reduce their consumption of fast food and those high in fat, starches and sugars to help control calorie intake, it states.
Emma Shields, from Cancer Research U.K. told Newsweek: "Although it can seem as though we're constantly bombarded with new messages about cancer prevention, this expert report highlights how remarkably consistent the advice has stayed".