Obesity explains almost 1 in 20 cancer cases globally

December 27, 2018 in Cancer Prevention, Nutrition Topics in the News, Weight Management

Obesity explains almost 1 in 20 cancer cases globally

Excess body weight is responsible for about 4 percent of all cancer cases worldwide and an even larger proportion of malignancies diagnosed in developing countries, a recent study suggests. 

As of 2012, excess body weight accounted for approximately 544,300 cancers diagnosed annually around the world. While overweight and obese individuals contributed to just 1 percent of cancer cases in low-income countries, they accounted for 7 to 8 percent of cancers diagnosed in some high-income Western countries and in Middle Eastern and North African nations. 

Not many people know that carrying excess body weight is linked to cancer; trying to achieve and maintain a healthy weight  may reduce the risk of cancer.

But the proportion of people who are overweight and obese has been increasing worldwide since the 1970s. As of 2016, 40 percent of adults and 18 percent of school-age children were overweight or obese, for a total of almost 2 billion adults and 340 million kids worldwide. 

While the proportion of people with excess body weight has increased rapidly in most countries and across all population groups, the surge has been most pronounced in some low- and middle-income countries that have adopted a Western lifestyle with too little exercise and too many unhealthy foods. 

The simultaneous rise in excess body weight in almost all countries is thought to be driven largely by changes in the global food system, which promotes energy-dense, nutrient-poor foods, alongside reduced opportunities for physical activity.

13 cancers tied to overweight, obesity

Overweight and obesity has been definitively linked to an increased risk of 13 cancers affecting the breast, colon and rectum, uterus, esophagus, gallbladder, kidney, liver, ovary, pancreas, stomach, and thyroid, brain and spinal cord, and blood cells. 

More recently, some research has also tied excess weight to risk for prostate tumors as well as cancers of the mouth and throat. 

Related: Obesity strongly linked to 11 types of cancer

The report offers fresh evidence of the need for policies that promote healthy eating and exercise habits as a way to battle obesity and reduce the global burden of cancer.

Source: CA: A Cancer Journal for Clinicians, online December 12, 2018.

All research on this web site is the property of Leslie Beck Nutrition Consulting Inc. and is protected by copyright. Keep in mind that research on these matters continues daily and is subject to change. The information presented is not intended as a substitute for medical treatment. It is intended to provide ongoing support of your healthy lifestyle practices.