Almost two in three adults and one in four children in Australia are overweight or obese.
Obesity is classified as a disease, but it is also a risk factor linked to many other diseases, including heart disease, stroke and a number of cancers.
Research has linked obesity to oesophageal adenocarcinoma; bowel cancer; cancer of the liver, gallbladder, and bile ducts; pancreatic cancer; postmenopausal breast cancer; endometrial cancer; kidney cancer; and multiple myeloma (cancer in the plasma in the blood).
Emerging evidence suggests obesity may also contribute to another eight cancers.
In the United States, excess body weight is second only to smoking in terms of modifiable risk factors resulting in death from cancer.