Because Cannabidiol (CBD) oil is extracted from the cannabis plant, you want to make sure the plant is grown without pesticides and the oil extraction method is done without chemicals or toxic solvents. In order to know this, read the company's website (or ask them) if they use subcritical & super critical CO2 extraction. Also, ask if the plant was grown using organic methods. Finally, always ask to see the C of A (certificate of analysis).  This is the only CBD moisturizer I'll ever use.