By Mehmet C. Oz, M.D.
Because your body thinks you're about to starve. Thousands of years ago,
hunger was a caveman's primary source of anxiety. When food became scarce, his
body coped with the resultant stress by releasing steroids, which were absorbed
by his omentum — a fat reservoir that hangs like an apron over the stomach —
and promoting fat storage. And since your body doesn't know the difference
between a demanding boss and a depleted herd of mastodons, your omentum will do
Well they sure sound energizing. But are they actually any better than a candy bar or a bottle of soda? It depends on the product and its consumer, say experts, who note that the sheer variety make blanket statements difficult.
To get the full story, WebMD investigated the different kinds of energy edibles, their ingredients, and general effects on the body. Some products provide full nutritional information, while others closely guard the secrets of their proprietary blends. But many of these products just haven’t been studied very well.
We also asked the experts whether these products really add anything to our lives. Are we all limping through life, suffering from an energy crisis -- a crisis that unwrapping a power bar can resolve? Or does our obsession with edible energy have very little to do with good nutrition?
Energy Bars and Gels
All energy bars, goos, and ices are not created equal. Some pack in the carbohydrates, proteins, or fats. Others bring in vitamins and minerals. The flavors are plentiful, too, with cookies and cream, cappuccino, lemon poppy seed, and chocolate raspberry fudge appealing to the taste buds.
John Allred, PhD, food science communicator for the Institute of Food Technologists, shakes his head at the mention of energy products. "They are outrageously expensive for what you are getting," he says. "There's nothing magical about the ingredients."
The same nutrients could be found in a banana, yogurt, or a chocolate bar, which are cheaper options, Allred explains.
To be fair, the carbohydrate or protein composition of some energy bars and gels may provide a more sustained charge than products that primarily use sugar or caffeine. The power surge of sugar usually lasts about 30 minutes to one hour, and caffeine about two hours. The rush from sugar and coffee is usually followed by an energy low.
Energy bars and gels with carbohydrates will definitely provide a boost, as carbs are the body's preferred fuel source. It's ideal if much of the carbohydrate source is fiber, as the roughage takes longer to digest, providing more sustained energy. This can be especially helpful for people involved in endurance events. Protein-rich products can also provide staying power and strength. The nutrient helps build muscle and regulates energy production in the body.