Carbohydrates are the body's most important and readily available source of energy. Even though they've gotten a bad rap lately and are sometimes blamed for the obesity epidemic in America, carbs are a necessary part of a healthy diet for both kids and adults.
The two major forms of carbs are:
So how, exactly, does the body process carbs and sugar? All carbohydrates are broken down into simple sugars, which are absorbed into the bloodstream. As the sugar level rises, the pancreas releases the hormone insulin, which is needed to move sugar from the blood into the cells, where the sugar can be used as energy.
The carbs in some foods (mostly those that contain simple sugars and highly refined grains, such as white flour and white rice) are easily broken down and cause blood sugar levels to rise quickly.
Complex carbs (found in whole grains), on the other hand, are broken down more slowly, allowing blood sugar to rise more gradually. A diet that's high in foods that cause a rapid rise in blood sugar may increase a person's risk of developing health problems like diabetes and heart disease, although these studies have been done mostly in adults.
Despite the recent craze to cut carbs, the bottom line is that not all foods containing carbohydrates are bad for kids, whether they're complex (as in whole grains) or simple (such as those found in fruits). If carbs were such a no-no, we'd have a huge problem since most foods contain them.
Still, some carbohydrate-dense foods are healthier than others. Healthy sources of carbohydrates include:
For kids over 2 years old, a healthy balanced diet should include 50% to 60% of calories consumed coming from carbohydrates. The key is to make sure that the majority of these carbs come from good sources and that added sugar in their diet is limited.
Carbohydrates have taken a lot of heat in recent years. Medical experts think consuming too many refined carbs — such as the refined sugars in candy and soda, and refined grains like the white rice and white flour used in many pastas and breads — have contributed to the dramatic rise of obesity in the United States. (Of course, not exercising and eating overly large food portions are key parts of the obesity epidemic.)
How could one type of food cause such a big problem? The "bad" carbs (sugar and refined foods) are easy to get, come in large portions, taste good, and aren't too filling. So people tend to eat more of them than needed. And some are not needed at all — foods like colas and candy provide no required nutrients; instead, they add only "empty calories."
But this doesn't mean that all simple sugars are bad. Simple carbs are also found in many nutritious foods — like fruits, vegetables, and dairy products, which provide a range of essential nutrients that support growth and overall health. Fresh fruits, for example, contain simple carbs but also have vitamins and fiber.
The 2010 dietary guidelines recommend that Americans eat more unrefined ("good") carbs, saying that everyone — including kids and teens — should increase whole-grain consumption and avoid added sugar. In fact, at least half of grain intake should come from whole grains.
Whole grains certainly sound like the healthy way to go. But what makes them so different from simple carbs? Whole grains like brown rice, oatmeal, and whole-grain breads and cereals are complex carbohydrates.
Some refined grain products are "enriched." This means that nutrients like some B vitamins (such as thiamin, riboflavin, niacin, and folic acid) and iron are added back after processing. So these products might contain more of these nutrients than unrefined whole-grain foods that have not been fortified.
The actual amount of grain consumption needed depends on a person's age, gender, and level of physical activity. Most school-age kids should eat four to six "ounce equivalents" from the grain group each day, at least half of which should come from whole grains. An "ounce equivalent" is like a serving — one slice of bread; 1 cup of ready-to-eat cereal; or a half cup of cooked rice, cooked pasta, or hot cereal can be considered a 1-ounce equivalent.
Foods that are high in added sugar (soda, cookies, cake, candy, frozen desserts, and some fruit drinks) tend to also be high in calories and low in other valuable nutrients. As a result, a high-sugar diet is often linked with obesity. Eating too many sugary foods also can lead to tooth decay.
The key to keeping sugar consumption in check is moderation. Added sugar can enhance the taste of some foods, and a little sugar, particularly if it's in a food that provides other important nutrients (such as cereal or yogurt), isn't going to tip the scale or send your child to the dentist.
Instead of serving foods that are low in nutrients and high in added sugar, offer healthier choices, such as fruit — a naturally sweet carbohydrate-containing snack that also provides fiber and vitamins that kids need.
One way to cut down on added sugar is to eliminate soda and other sugar-sweetened beverages. Consider these facts:
Instead of soda or juice drinks (which often contain as much added sugar as soft drinks), serve low-fat milk, water, or 100% fruit juice. A note: Although there's no added sugar in 100% fruit juice, the calories from those natural sugars can add up. So limit juice intake to 4-6 ounces (118-177 milliliters) for kids under 7 years old, and to no more than 8-12 ounces (237-355 milliliters) for older kids and teens.
It isn't always easy to tell which foods are good choices and which aren't. To figure out carbohydrates, look under Nutrition Facts on food labels, where you'll find three numbers for total carbohydrate: the total number of carbohydrates, the amount of dietary fiber, and sugars.
Although carbohydrates have just 4 calories per gram, the high sugar content in snack foods means the calories can add up quickly, and these "empty calories" usually contain few other nutrients.
Making sure that kids get a balanced, nutritious diet isn't as hard as it may seem. Simply make good carbohydrate choices (whole grains, fruits, veggies, and low-fat milk and dairy products), stock your home with healthy choices, limit foods containing added sugar (especially those with little or no nutritional value), and encourage kids to be active every day.
Above all, be a good role model. Kids will see your wholesome habits and adopt them, leading to a healthier lifestyle throughout childhood and into adulthood.
Reviewed by: Carla W. Holder, MD
Date reviewed: August 2014
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