Okay, with flower essences, it's not like it is with Western medicine. It's totally individual. One individual may have a spinal subluxion due to a particular emotional issue or spiritual challenge, which will necessitate something like Broccoli essence to heal the inner child. Another person may have a spinal subluxion for completely different reasons, which would necessitate an entirely different flower essence to re-establish balance. having a complete set of essences from Perelandra will ensure that you can address absolutely every issue imaginable - spiritual, viral, emotional, you name it! :)