Though a fast food restaurant may seem like a bad idea while on a low-carb diet, many chain restaurants offer menu items that are high in protein and low in carbohydrates. This type of diet can be maintained on the road by knowing what to order at fast-food restaurants. Most restaurants have menu options that cater to this type of diet.

Low-carb, fast-food items include hamburgers and grilled chicken sandwiches without bread. Another option is a sandwich wrap, which is made with a low-carb tortilla. Grilled chicken tenders are also acceptable for this type of diet, as well as most salad entrees. Soups and chili are additional safe options for this diet. Breakfast items such as eggs, sausage, ham and bacon are also types of low-carb fast food.

These items should contain little or no sauce, glazes or condiments, as these items are typically high in sugar. Sandwich items will not include buns or breading, which may be replaced with lettuce, a tortilla, or be removed entirely. Salads should be heavy in vegetables and may include grilled chicken, but they should not include croutons or tortilla strips. These choices are typically plain and offer condiments, sauces and dressing on the side.

Low-carb fast food does not necessarily mean the menu item is low in calories or fat. These items may also be high in sodium, so dieters should check the nutritional information for complete information. Traditionally, low-carb items such as beef or chicken patties may contain additives that add carbohydrates. Condiments and dipping sauces should also be avoided, as they contain sugar. Salad dressing can also be high in sugar and should be used sparingly.

Many restaurants offer a list of low-carb entrees or options, but these menu items can still have too many carbohydrates for one's diet. It is the dieter's responsibility to check the carbohydrate content of menu items to ensure the count is low enough to fit one's diet. If a restaurant advertises an item as low carb, it does not necessarily mean the carbohydrate count is low enough to fit one's dietary needs.

Low-carb, fast-food options allow people to maintain their diets on the go. Rather than package a day's meals before leaving the house, a dieter has the option to dine at a restaurant. These menu items also allow for increased variety in one's diet, as there is an assortment of restaurants and food types from which to choose. The ability to choose menu items that are low in carbohydrates gives dieters freedom to eat fast food while maintaining a low-carb diet.