You need variety, balance, and moderation. The same goes for soft drinks and candy. Besides being low in fat and sodium and high in carbohydrates, fruits and vegetables can be good sources of vitamin A and C, other vitamins, some minerals, and other plant substances. For more help in evaluating your diet, see the Food Guide Pyramid Dear Nutrition Spotlight, I am having a hard time visualizing what is a serving size for many of the foods I am eating. I find it especially difficult because I eat out often.
Food serving size is one of the keys to maintaining healthy weight.
You can learn to visualize serving sizes with reasonable accuracy. Most people need from 1,600 to 2,800 kilocalories a day, depending on age and lifestyle.