Forks Over Knives

What do you think this documentary will be about? I think this documentary is  going to be about food.
What do you think the title implies or indicates about the film?
You use forks and knives but you use more the fork then the knives
Notes

In the poor side there is a lot of fast food restaurant right next to each other. 

Rats that ate 20% had more higher rates with diseases than the rats that had 5% and remained healthy. 

Most research says that people who had cancer in their family got it but people who didn't have it in their family got it from their diet.