Being overweight is directly linked to specific cancers, the USA Today newspaper has reported
About 105,000 new cases of cancer are caused by obesity every year.
An in-depth analysis on the issue was just released by the American Institute for Cancer Research.
Breast cancer tops the list with the strongest link with obesity with 33,000 new cases a year.
Other cancers linked with excess body fat: endometrial, kidney, colorectal, pancreas, esophagus and gallbladder.
Researchers with the American Cancer Society say that list will "almost certainly" increase as they continue to research the link.