We all want to know what those naturally thin people are doing to stay so um, naturally thin. Prevention has discovered that healthy thin people just don't think about food the same way as everyone else. In this 8 part series, I'll reveal Prevention's 8 secrets of naturally thin people one by one.

• They're Creatures Of Habit: Any dietitian will tell you that a varied diet is good--but too much variety can backfire, says Katz, author of The Flavor Point Diet. Studies have shown that too many tastes and textures encourage you to overeat, he explains. "Thin people have what I call a food groove--the majority of their meals consist of well-planned staples," says Beck. "There are a few surprises thrown in, but for the most part, their diets are fairly predictable."

  Emulate Them: Try to be as consistent as possible with your major meals--have cereal for breakfast, a salad at lunch, and so forth. It's okay to add grilled chicken to the salad one day and tuna the next, but by sticking to a loosely prescribed meal schedule, you limit the opportunities to overindulge.

More secrets revealed this week. Did you miss any? You can see all the secrets here.

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