Diabetes Guidelines

hey i have some health questions…

Well here it goes

1) What are the dietary guidelines for diabetes???

2) What causes food allergies??

3) HOW CAN DIET AID IN THE PREVENTION OF THE FOLLOWING CANCERS?
-BREAST
-COLON
-STOMACH
-PROSTATE
-LIVER

and last!

4) What are three dietary guidelines you can follow to help reduce your risk of cardiovascular disease???

Thanks! Also i accept links to the places u got the info! or just type the link with the info on it!!
Thanks so much!