Cannabis and CBD are not two entirely different things, in fact, CBD can always be found in any strain of cannabis. CBD is one of the five main chemical compounds found in cannabis but can be extracted entirely to be used on its own. The difference between cannabis and hemp is getting another chemical compound, THC, below .3%. Altering the genetic makeup, and thus creating various strains of marijuana, will also alter the effects of each strain. This is why a lot of CBD is extracted entirely; CBD acting independently from the cannabis strain as a whole is able to isolate the CB1 and CB2 sectors of the endocannabinoid system, without having the less-than-desirable side effects.
On a microscopic level, there are over a hundred receptors throughout the body that react to CBD, THC, and CBN. These receptors can grab cells and cause them to have an effect on the body such as lowering blood pressure, reducing fear and anxiety, or pain relief. The CB1 track has most of its receptors located in the brain and central nervous system, and reacts like a key to a lock with THC. The CB2 track is mostly concentrated in the immune system and reacts with CBN, cannibinol. CBD however, works on both tracks with different effects.
One could, for example: use cannabis to treat inflammation within the immune system, but within cannabis there lies all three “keys,” THC, CBD, and CBN. While it would treat the inflammation the patient may experience a decrease in motor skills, drowsiness, and an increased appetite when ingesting a CBD extract on its own could have treated the issue, without the debilitating effects of a ‘high”.