Fruits and vegetables provide a wide range of valuable nutrients like fiber, vitamins and potassium. You would probably notice very few effects in the short-term. One possible short-term effect might be constipation since fruits and vegetables are high in fiber, although this would depend on the other foods in your diet. Effects of not including fruits and vegetables in the long-term might include risk for a few vitamin deficiencies, such as Vitamin C, which is provided solely by certain fruits and vegetables. A variety of colorful fruits and vegetables are great sources of many vitamins, minerals, and natural substances that may help protect us from chronic diseases including stroke, certain types of cancer and heart disease. Additionally, eating more fruits and vegetables can make a difference in maintaining a healthy weight when they are eaten in place of high calorie, high fat foods. By not eating fruits and vegetables, you may be deprived of those potential benefits.