A CBD isolate is a pure, isolated CBD compound that has been removed from the hemp plant. It is extracted by using an ethanol (drinking alcohol) extraction method and is a white powder that is tasteless and odorless. CBD isolate contains no THC and is best for someone who absolutely cannot risk testing positive on a drug test. (Note: While testing positive for THC in a drug test by using full spectrum (with <0.3% THC) is rare, it is possible)
Full spectrum contains other active plant compounds called cannabinoids, as well as CBD. Those cannabinoids include CBN, CBG, and CBC as well as aromatic cannabis terpenes which give it the “green, planty” taste and smell. It contains the maximum level of THC, 0.3%, allowable to be legal in all 50 states in the US. The interaction between the THC and cannabinoids within the human body is also believed to cause an entourage effect which helps maximize the therapeutic effects of CBD oil. A large part of alternative medicine revolves around using the entire plant for medicinal purposes.
Everyone responds differently to each form, the only way to know which works best for you is experimentation. Each oil is mixed with MCT coconut oil to make it easier to use in a dropper bottle