Fast food is typically loaded with calories, sodium, and unhealthy fat so making healthy choices is rarely easy. While choosing the healthiest fast food can depend on your specific dietary needs, there are some general guidelines that can help. Start by reviewing the menu and nutritional information before you order. Try to limit your order to fewer than 500 calories, and avoid fried foods and high-sodium options whenever possible. Foods that are high in protein and fiber will fill you up for longer without the energy crash that follows meals that are high in carbs. Go easy on sweet drinks and condiments as they can add lots of empty calories and sugar to your meal.