In terms of how CBD is extracted from the cannabis plant, there a few different techniques that can be used. The most popular used to be by running harsh chemicals like butane (lighter fluid) or hexane over the raw plant material, but people quickly found out that this resulted in trace amounts of carcinogenic compounds (like formaldehyde) being left over in the end product. Not good.
As the oil is in liquid form it can be consumed orally without smoking and can be easily administered to ailing children and adults for whom it is prescribed as medication. Though hemp plant is used for several industrial products and also as biofuel, the seeds and flowers of the plant are used to produce oil that is an active ingredient in several medical therapies for humans and animals.
CBD and THC interact with our bodies in a variety of ways. One of the main ways they impact us is by mimicking and augmenting the effects of the compounds in our bodies called “endogenous cannabinoids” - so named because of their similarity to the compounds found in the cannabis plant. These “endocannabinoids” are part of a regulatory system called the “endocannabinoid system”.
Isolates are typically the CBD oil product of choice for those who get drug tested or are sensitive to other cannabinoids such as THC. Products labeled as isolates will generally be highlighted as being 99+% “pure CBD.” Usually, these products will have nothing but CBD in them because the CBD has literally been isolated from everything else. You can find pre-made isolate oils that typically consist of a carrier oil, such as MCT oil, infused with the crystalline isolate powder. You can also find the “raw” CBD crystalline powder or slabs (a form of concentrate) on its own.