Five guys is an amazing burger restaurant. They have delicious burgers and fries along with creamy milkshakes. Unfortunately, we can't eat those kinds of things on the keto diet. The good news is that there are some options for keto at five guys. First of all, all burgers can be made without a bun. You can either get your burger in a bowl or lettuce wrapped. This is great for low carb eating. So stick with burgers and stay away from the bread. Here are some toppings you could get and still stay within your macros: Bacon, Mayo, Lettuce, Pickles, Tomatoes, Grilled Onions, Grilled Mushrooms, Mustard, Onions, Jalapeño Peppers, Green Peppers, Hot Sauce, A1 Sauce. Some of these have a few carbs so you may want to avoid piling too many topping on your burger. The hotdogs have only 1 gram of carbohydrates per serving, so you could eat a plain hot dog if you want. As a side, you could grab a handful of the free peanuts. They contain only 4 grams of carbs for about 20 peanuts. I hope this helps you stick to your diet and eat keto at five guys.