Do you consider products from specialty supermarkets to be healthier than those from other grocery stores? Or do you think that dishes from organic restaurants are all waistline-friendly? If you answered yes to either of these questions, you could be derailing your weight loss efforts. When people guess the number of calories in a sandwich coming from a “healthy” restaurant, they estimate that it has, on average, 35 percent fewer calories than they do when it comes from an “unhealthy” restaurant, according to a study in the Journal of Consumer Research. Remember that the next time you reach for that package of Whole Foods’ Organic Fruit & Nut Granola. One cup of this seemingly healthy snack contains almost 500 calories. Yikes!