Junk food increases pancreatic cancer risk.  Researchers looked at added sugar, soft drink consumption, and "sweetened fruit soup" consumption over a 7.2 year period.  They found that people who ate the most of this junk had the following increased rates for pancreatic cancer:

• 69% increase for those with the most added sugar
• 93% increase for those with the most soft drinks (almost double!)
• 51% increase for those who ate the most sweetened fruit soups (I'm glad that I don't know what these are!) 

Jack Lalanne has a simple rule that I like very much--"If man made it, don't eat it!" 

Read the study here.