Healthy Foods That Could Derail Your Diet

From avocado to red wine, many "healthy" foods can be loaded with fat and hidden calories.
2:22 | 07/08/14

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Transcript for Healthy Foods That Could Derail Your Diet
How your diet could be sabotaged by eating healthy foods. Too much of a good thing could have you taking in a surprising amount of calories and Brandi Hitt has more. Reporter: Burgers, fries and chips. Those greasy foods we all know to avoid when trying to lose weight. But it turns out healthy options can also destroy your diet and pack on the pounds. Natural foods that are just high in calories but super healthy. Reporter: Take avocados this super food is loaded with antioxidants but also high in fat. One avocado contains up to 350 calories. A quarter of an avocado would be the healthy rank for a salad. Reporter: Rachel Beller says nuts are loaded with heart healthy fats and pro-too teen but just a quarter cup of walnuts is also loaded with 190 calories in exactly the same as this glazed doughnut. The doughnut looks good. It does. Reporter: Look closely at exactly what you're getting with a quarter of a cup. Who stops at eating just a quarter cup of walnuts, though? You don't. It's two to three handfuls and lands you somewhere in the neighborhood of 500 calories. Reporter: What about red wine? In moderation it is linked to reduced risk for Alzheimer's and certain types of cancer but this glass like this is 200 calories. When I see women having two glasses of wine tell them enriggs yourself having two candy bars. Reporter: She suggests opting for fresh fruit instead of dried fruit. Half cup, 30 calories. 230 calories. Reporter: She says it's all about portion control to control your waistline. For "Good morning America," Brandi Hitt, ABC news, los Angeles. That is a real eye opener. Two glasses of wine, two candy bars. You're comparing calories to calories aif they're all equal. I'm not sure they are. The sugar and fat you get from a candy bar is not the same as a glass of wine. So drink up. Yes. Even if I'm wrong, it doesn't matter. Because you say it with such authority. As we witnessed yesterday. Yeah. I love a woman who doesn't hold a grudge. That's all I have to say.

This transcript has been automatically generated and may not be 100% accurate.

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