I've had some success with IF'ing even though Dr. Kruse doesn't recommend it until you're LS. I have seen some signs of LS, but I do not think I'm fully there yet.
My best days have been when I eat salmon, some avocado & grilled onions for breakfast (with 3-4T of CO). The rest of the day, I drink only water and green tea. I eat enough for breakfast that I am not hungry.