I'm gluten, dairy and soy free. It's hard to eat out when I'm on the road. However, in a pinch, 5 Guys works. Since their burgers are 100% beef and not seasoned and they only fry potatoes in their fryer, it works. I stay away from the mayo though since most have soybean oil as the main ingredient. They do give way too many fries and the food is expensive.