Fruits and vegetables provide your body with lots of vitamins and minerals which are hard to come by in other areas of your diet. They also have a high water and low fat content so are a good choice for snacks. Research has shown that a diet which lacks in this group of food can lead to diseases such as heart disease and even some cancers! A lack of it can also lead to high blood pressure and various vitamin deficiencies which result in a lowered immune system, and sometimes long-term illness. So as you can see, it's pretty important.