3. Cancer
Obesity is clearly linked to several types of cancer, including colon, breast (after menopause), uterine, kidney, and esophagus. Some studies suggest a connection between obesity and cancers of the gallbladder, ovaries, and pancreas.
Researchers and medical professionals speculate a connection between this deadly disease and constant, low level inflammation, which is common in overweight people.
Other potential explanations for the link include the higher amounts of estrogen produced by fat tissue and the presence of excess insulin, which helps cancer grow. If you are obese and worried, set a goal to lose 5% to 10% of your body weight to reduce that risk.