Thanks largely to Subway’s media campaign, sub sandwiches often come to mind when you think of “healthy” fast food. And while it is true that you can find relatively healthy choices at the top sandwich chains, their menus are not without their pitfalls. While sandwich shop ads promote their health benefits, studies have found that many people eat more calories per meal at a sub shop than at McDonald's. This may be because people feel so virtuous eating “healthy” as the ads suggest, they reward themselves with chips, sodas, or extra condiments that can turn a healthy meal into an unhealthy one. You can make healthier choices at a deli or sub shop but you need to use some common sense.