Meat, fat, salad vegetables are OK. Avocados and olives are OK. Cheese and butter are OK as is mayo. Anything starchy (potatoes, yams, beet roots) or full of carbs like grains are not OK. It's all about getting the carbs out. A note on carbs - dietary fiber doesn't count as you can't digest it. Total carbs - dietary fiber = net carbs and the net carbs are what you worry about. The food you see in RWD's thread are virtually carb free.