It is CBD Oli. It should be antagonistic to the active THC that is in cannabis and can trigger depersonalisation. I have tried it without any effect and i know of others who also have similar experience. However there are some posts saying some benefits from it and also some who says it have some effect on their anxiety.
Pure CBD Oil doesn't help me either, and high THC cannabis triggers my symptoms. It's the middle ground. Half THC and Half CBD that is magical for me.