Prof Sanders agrees that fruit and vegetables are not "super foods" that protect against cancer but - like many nutritionists - takes the view that it is better to fill up your platewith vegetables than a lot of the other high-calorie food it's so easy to snack on.
Consider a simple example: In a recent study at Harvard University, volunteers were seated at a table with a plate of potato chips directly in front of them and another food tucked away unobtrusively in the corner of the room.
The cycle goes on and the levels of toxicity increases until you get to the top of the food chain with pelagic fish such as swordfish that end up on our dinner plate.