Early on when I started low carb, I'd occasionally run into a fast food burger joint and toss the bun and eat the meat. It's been a long time since I've done that, as I realized the meat had fillers, had zero taste, and I wasn't doing myself any good. Once I became a fat burner, I didn't need to eat at times, so I'd just do without the food and burn my own on-board fuel instead. In the past, I've tried the Unwich at Jimmy Johns, meh. Today, I never go to fast food other than an occasional chopped salad at subway.