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"I'm eating lots of low-fat foods"
And you're not losing any weight, right? Theres a reason why. "Research shows that if you tell a person that a food is low-fat, she'll take a larger serving," says Somer. And more food even if it's nonfat means more calories.
Read labels carefully. The front of the package can make all kinds of cheerful claims ("Half the fat!"), but the cold facts are in the nutrition information. You'll find, for example, that those delicious SnackWell's Fat Free Devil's Food Cookies are 50 calories each. (So you might want to put that second one down.) And those low-fat Cheez-Its? Sure, they're only 130 calories a serving. But that's just 29 measly crackers you can eat that in one minute alone.
Eat your greens. Veggies are low in calories and also extra filling. A study from Pennsylvania State University showed that women who ate a large low-cal salad (lettuce, carrots, celery, tomatoes, and cucumber tossed with fat-free dressing and light cheese) before lunch felt so full, they ate less at the meal.
Let yourself have the low-cal dressing. It won't throw off your numbers, and it may encourage you to eat more of these salad superfoods.