Change the flavour of food
Have you ever noticed that food which is healthy and good for you often tastes either unpleasant, or simply bland (Simply Red could have called themselves that!). In marked contrast, food which is bad for you, such as crisps and chocolate, taste nice. It's a pity they don't add flavourings to vegetables so they taste nicer. Perhaps if they did, more people would then eat them, and as a result, the heart attack and stroke rates in the UK would be reduced.