How can obesity affect cancer?

Obesity increases the risk of many types of cancer. The most common cancers that have been shown consistently to be linked with obesity include those of the breast, colon, kidney, esophagus, uterus, pancreas, thyroid and gallbladder. There are many reasons to maintain a healthy weight, and an increased risk for the above cancers is an important one.

A new study reveals that obesity actually can make cancer more aggressive at the time it's discovered. In this Treadmill Talk, Sharecare expert Dr. Michael Roizen explains why and gives tips on how you can lower your BMI.