Depending on whether or not you intend to closely adhere to a given protocol, in many respects it becomes a matter somwhere around preference / opinion / debate as far as what steps/ingredients are necessary.
Ornithene is very much a part of the Hulda Clark
protocol. The main reason she includes it is to help prevent insomnia during the night after you've begun the actual liver flush. Since I closely adhere to the Clark protocl, I take the Ornithene desptie the fact that it did not help me sleep the night of my first flush.