Doctors at UT Southwestern Medical Center at Dallas say you need to keep this in mind when you alter your eating patterns. And, while replacing fats with carbohydrates can be good for you, if you take in more calories than you need, you'll still gain weight. One food trick that may help is to replace high-fat foods with other foods that are lower in fat and calories. Try air-popped popcorn instead of chips or popcorn popped in oil. You also could try fruits and vegetables.
Grapes are great for snacking.
Baby carrots you can munch right out of the bag are terrific as well. High-fiber foods are filling, which makes you less likely to be hungry later. Beans and high-fiber cereals with skim milk make good, filling meals with relatively few calories. Breads also fill you up, and sweetened, low-fat breads like cinnamon raisin or blueberry bagels can satisfy your sweet tooth. Eating slowly can trick your brain into thinking you're full, so foods like oranges, which take a long time to peel and section, can help you eat less and still feel full.