Helps fight: colon, esophageal, oral, and skin cancers.

There are "trends" -- subtle increases -- in gastro-esophageal cancers and blood cancers such as multiple myeloma, and non-Hodgkin's lymphoma, said Prezant, but they are difficult to generalize.

Smoking and heavy drinking increase your likelihood of stomach and esophageal cancers. But Swedish researchers have identified a surprise risk factor: chronic heartburn.