Obesity tied to half a million cancers globally

Obesity is associated with close to 500,000 new cancer cases worldwide each year, and nearly two-thirds of obesity-related cancers occur in North America and Europe, a new report published in The Lancet Oncology shows.

The analysis of data from 184 countries showed that excess weight was associated with 5.4% of new cancers in women in 2012, and 1.9% of new cancers in men in 2012.

Scientists hypothesise that excess body fat may trigger cancer by changing insulin, glucose and hormone levels, and increasing chronic inflammation.

Among women, postmenopausal breast, endometrial and colon cancers accounted for nearly three-quarters of obesity-related cancers, while colon and kidney cancers accounted for more than two-thirds of obesity-related cancers in men.

The study indicates a call for global support to prevent or reduce the burden of obesity. If this current rising trend of obesity continues, it will certainly boost the future burden of cancer, particularly in countries, where the largest increases in the rate of obesity have been seen in recent years.

Although a higher weight may not necessarily cause cancer, maintaining a healthy weight is thought to be associated with a lower risk of many chronic diseases.

If you are currently overweight or obese, experts recommend that it is best to start by taking steps to lose weight through nutrition and exercise. Aim to lose 5% to 10% of your body weight as your first goal. Seek help from healthcare professionals who can help you lose weight.

Source: The Lancet Oncology