Fast foods are quick, reasonably priced, and readily available alternatives to home cooking. While convenient and inexpensive for a busy lifestyle, fast foods are typically high in calories, fat, saturated fat, sugar, and salt.

Fast food chains and restaurants have responded to the public's increasing awareness about nutrition and have attempted to help people concerned about health. For example, they now make ingredient and nutrition information available on their menus. Despite these changes, however, in order to maintain a healthy diet, it is necessary to choose fast foods carefully.

Most people today have less time to select, prepare and eat food than their grandparents did. Fast foods are very appealing because they are widely available and inexpensive.

Fast food items have been modified to reflect consumers' concern about the fat content of their food. Many fast food restaurant have switched from beef tallow or lard to hydrogenated vegetable oils for frying.

Some restaurants offer low calorie choices like salad bars and assorted take-out salads with low calorie dressing, low-fat milkshakes, whole grain buns, lean meats, and grilled chicken items.

Maintaining nutritional balance is not easy with fast food, because there is no control over how they are cooked. For example, some are cooked with a lot of oil and butter, and there may be no option if you want your selection with reduced fat.

The large portions also encourage overeating. Fast food also tend to lack fresh fruits and vegetables.

In general, people with high blood pressure, diabetes, and heart disease must be much more careful about choosing fast food, due to the high content of fat, sodium, and sugar.