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13 Keys to a Healthy Diet

Developing healthy eating habits isn't as confusing or as restrictive as many people imagine. The first principle of a healthy diet is simply to eat a wide variety of foods. This is important because different foods make different nutritional contributions.

Secondly, fruits, vegetables, grains, and legumes—foods high in complex carbohydrates, fiber, vitamins, and minerals, low in fat, and free of cholesterol—should make up the bulk of the calories you consume. The rest should come from low-fat dairy products, lean meat and poultry, and fish.

You should also try to maintain a balance between calorie intake and calorie expenditure—that is, don't eat more food than your body can utilize. Otherwise, you will gain weight. The more active you are, therefore, the more you can eat and still maintain this balance.

Following these three basic steps doesn't mean that you have to give up your favorite foods. As long as your overall diet is balanced and rich in nutrients and fiber, there is nothing wrong with an occasional cheeseburger. Just be sure to limit how frequently you eat such foods, and try to eat small portions of them.

You can also view healthy eating as an opportunity to expand your range of choices by trying foods—especially vegetables, whole grains, or fruits—that you don't normally eat. A healthy diet doesn't have to mean eating foods that are bland or unappealing.

The following basic guidelines are what you need to know to construct a healthy diet.

1 Eat plenty of high-fiber foods—that is, fruits, vegetables, beans, and whole grains. These are the "good" carbohydrates—nutritious, filling, and relatively low in calories. They should supply the 20 to 30 grams of dietary fiber you need each day, which slows the absorption of carbohydrates, so there’s less effect on insulin and blood sugar, and provides other health benefits as well. Such foods also provide important vitamins, minerals, and phytochemicals (plant chemicals essential to good health).

2 Make sure to include green, orange, and yellow fruits and vegetables—such as broccoli, carrots, cantaloupe, and citrus fruits. The antioxidants and other nutrients in these foods may help protect against developing certain types of cancer and other diseases. Eat five or more servings a day.

3 Limit your intake of sugary foods, refined-grain products such as white bread, and salty snack foods. Sugar, our No.1 additive, is added to a vast array of foods. Just one daily 12-ounce can of soda (160 calories) can add up to 16 pounds over the course of a year. Many sugary foods are also high in fat, so they’re calorie-dense.

4 Cut down on animal fat. It’s rich in saturated fat, which boosts blood cholesterol levels and has other adverse health effects. Choose lean meats, skinless poultry, and nonfat or low-fat or nonfat dairy products.

5 Cut way down on trans fats, supplied by hydrogenated vegetable oils used in most processed foods in the supermarket and in many fast foods.