Full spectrum CBD products contain all phytochemicals that naturally occur in the Cannabis plant, including CBD, THC (less than 0.3%), and other cannabinoids and terpenes. Broad spectrum CBD contains all phytochemicals that occur in the plant, except for THC. Isolate is the purest form of CBD, wherein an extraction process removes all active compounds and phytochemicals from the Cannabis plant, leaving a powder-like substance that is 99% CBD.