The plant has a number of compounds that have a psychoactive effect (altering perception and mood) and others which do not. The former include delta-9-THC, CBN (cannabinol) and delta-8-THC, which have different potency and concentration levels in the plant. Of these, the most potent and abundant is delta-9-THC. It is these compounds that cause the effects sought by recreational users – in other words, the "trip".
CBD, in contrast, although it is a composite that acts on the central nervous system and is therefore psychotropic, does not have the psychoactive effects of THC. On the contrary, it antagonizes the psychotomimetic effects (psychotic similes) caused by THC.
At this time, CBD is the cannabinoid that is recognised as having most beneficial effects for the treatment of various symptoms and diseases. It is also the one with the greatest therapeutic margin, albeit with minor side effects in a wide range of doses. In general, CBD is very well tolerated.
Read more about full-spectrum cannabis extracts vs. CBD isolate