Nutrition bars are foods sold to fill specific dietary needs. They tend to be larger than standard snack bars or granola bars and contain a wider variety of ingredients. The bars have been around for more than 20 years and the number of choices has exploded. An article in the Washington Post reports Americans purchased 42 million pounds of nutrition bars in 2004. Here's a rundown of some common kinds:

Energy bars. Energy bars usually contain a high level of complex carbohydrates to provide sustained fuel over a period of time. They also contain extra calories to give the body a quick burst of fuel. Consumers need to be aware that an energy bar may contain 200 to 300 more calories than other bars. Those calories may come from added sugars or fat. In fact, an energy bar may have as much sugar and fat as a candy bar.

Protein bars. As the name implies, protein bars have extra protein. Athletes need extra protein for the muscles. People in weight loss programs may also need extra protein. Some sources of protein in these bars include nuts, soy and dairy products. Experts say serious athletes, like endurance runners, body builders and those who are weight-training may benefit from protein bars. But most people can get extra protein in their food.

Balanced nutrition bars. These bars are often labeled with a series of numbers, like 40-30-30. The numbers indicate the ratio of carbohydrates to protein to fat. Supposedly, the ratios represent the proper balance of nutrients for fuel and optimal performance. There is no clear consensus on who would benefit most from these bars.

Supplement bars. These bars contain added nutrients, like vitamins or minerals and are often targeted at a specific population. Some are designed just for women. A well-balanced diet and a vitamin supplement can provide the same results.

Health experts say an occasional nutrition bar isn't bad. It can be a good choice when someone is pressed for time or misses a meal. Keep in mind your needs. Then check out calories, fat, carbohydrates, protein and other added ingredients. Choose bars that are made with less saturated fats, like canola, vegetable or peanut oils. If you have food allergies, keep in mind many nutrition bars contain nuts.

The Zing Bar

Registered Dietitian, Sandi Kaplan, R.D., says while interest in nutrition bars is strong, some people have a hard time finding one that specifically meets their needs. Some bars have an excessive amount of refined sugar. Taste can be affected by poor quality, fortification with vitamins and minerals or the presence of preservatives or artificial ingredients.

In response to her clients' needs Kaplan and four of her colleagues developed the Zing® bar. She says Zing bars are made with high-quality all-natural ingredients and a balance of carbohydrates, whey protein and healthy fats. All are wheat-free. Kaplan says the bars are a good option for people who are trying to control chronic diseases, like diabetes, cholesterol or heart disease, and for those with gluten intolerance. Zing bars are also a good option for children.

The Zing bar currently comes in three flavors: Chocolate Peanut Butter, Blueberry Almond, and Oatmeal Chocolate Chip. A box of 12 bars costs $31.95 plus shipping and handling.

For information on the Zing® bars:

http://www.zingbars.com

For general information on healthy eating:

American Dietetic Association

USDA