3. Eating “diet” foods
Think you’re being weight-conscious by sipping on a diet soda? Think again. As it turns out, the artificial sweeteners used in many diet and “fat-free” foods may actually interfere with your weight-loss goals. Researchers at Purdue University found that lab mice who ate a diet of artifically sweetened yogurt consumed more calories and gained more weight over a two-week period than those who ate yogurt with a natural sweetener added. For a healthier way to sweeten your food, try honey or maple syrup—in moderation, of course.