[SunnySmile501]

The acceptable foods list is set out in a way that you can have liberal amounts of delicious and filling foods, and still stay at 20 grams of carbs without a lot of counting of carbs and we don't have to count calories.

Nuts are pretty calorie dense, contain carbs, and are hard for people to control the amount they eat. They also cause cravings in many people, me included, so they are best left out until after induction, when you have cravings under control and appetite is suppressed. They are added back in by the third rung, so you don't have long to wait.