(CNN) - When you're on a diet, food consumes your life.
You can't eat carbohydrates, so you think about them constantly. You can't dig into your co-worker's candy drawer, so M&M's float across your computer screen like a desert mirage.
You skip the bar after work because that's where the margaritas live. And forget snacking after 8 p.m.; that would be breaking diet rule No. 364.
"I've hated diets all my life," says Lucy Danziger, who is ironically the author of weight-loss book, "The Drop 10 Diet ."
"If I tell you 'Don't think about this,' that's all you can think about."
What if losing weight didn't have to be so negative?
As the editor-in-chief of SELF magazine for more than 10 years, Danziger has seen every fad diet known to woman come across her desk.
Then, five years ago, the triathlete decided to ditch dieting all together and focus on choosing foods that would "pay her back." She wanted to run, swim and bike faster, and she needed the proper fuel to do that.
Danziger started eating superfoods: foods like nuts, berries and whole grains that are full of fiber, protein and important nutrients. In less than six months, she dropped 25 pounds.
It's certainly not a new nutrition concept: Avoid processed foods; eat more vegetables and fruits; replace white bread with wheat. But the idea of focusing on what you should eat, instead of what you can't, could change the way we look at weight loss in America, Danziger says.
"We're going to give you so many choices of what you can eat, you're not thinking about starvation. ... You're thinking about feeding the engine."
Danziger is big on metaphors. As she noshes on almonds in her office, she compares superfoods to premium gas for a car. "They have to do more than supply you with calories."
So what makes a food "super"?
Dr. Steven Pratt coined the term in 2004 with his first book, "SuperFoods Rx: Fourteen Foods That Will Change Your Life ."
According to Pratt, a superfood has three qualifications: It has to be readily available to the public, it has to contain nutrients that are known to enhance longevity, and its health benefits have to be backed by peer-reviewed, scientific studies.
Pratt lists salmon, broccoli, spinach, berries and green tea as a few of his favorites. His website, SuperFoodsRx.com , gives 20 more examples.
"These foods were chosen because they contain high concentrations of crucial nutrients, as well as the fact that many of them are low in calories," the website states. "Foods containing these nutrients have been proven to help prevent and, in some cases, reverse the well-known effects of aging, including cardiovascular disease, Type II Diabetes, hypertension and certain cancers."
Weight loss wasn't on Pratt's agenda when he started supporting superfoods. Yet as he traveled around the world touting the brand, that's what people were excited about.
"The most common thing I hear is how much weight people lost without trying to lose weight," Pratt says. "It's the non-diet diet. It's food you can eat for a lifetime."
Marisa Moore , a registered dietitian with the Academy of Nutrition and Dietetics, says superfoods are healthy, but adding them to your plate won't simply melt the pounds away.
"Yes, there are foods that are high in fiber, water and protein, and therefore promote satiety. ... These are without a doubt recommended as weight-management friendly," Moore wrote in an e-mail. "But to say that they boost fat loss may be taking it a step too far."
Danziger agrees: Superfoods aren't a free pass to eat as much as you want, whenever you want. Still, it would be pretty difficult to get fat eating spinach.
For Danziger, eating superfoods is about energy. She feels super after eating superfoods. She wants to work out, which in turn helps her sleep better, which gives her more energy and keeps her diet on track.
Pratt says that feeling is what keeps the superfoods trend strong.
"The better you feel, the more you do it. Your body will send an e-mail to your brain within minutes thanking it, saying, 'I'm going to do better. I'm not going to get sick anymore.' "
After joking about injecting that feeling into his patients, Pratt turns serious. He's been pushing superfoods since the mid-1990s, and still obesity rates and obesity-related disease rates are sky-high in America.
Pratt attributes most of that to the culture: It takes time and energy to make a change. Danziger says cost is certainly an issue for some people. But both experts agree the reward is worth it in the long run.
"At the end of the day, you invest in your wardrobe and your hair and your car and everything else," Danziger says. "So invest in your body. Because it's supposed to last for 100 years."
Copyright © 2012 CNN. All Rights Reserved
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