Eating more diet foods because they're supposed to contain less fat, sugar or calories.
Why it makes you gain weight: According to a study published in the International Journal of Obesity, sweeteners in many low-calorie and diet foods interfere with how the body processes the amount of calories it ingests, and, as a result, can lead the body to believe that other sweets it digests are calorie-free, too, which can promote weight gain. The key to keeping the pounds off? Make sure you pay attention to how much you eat, factor each calorie into your daily allowance, and don’t turn to these types of foods as meal replacements.
