In the United States, the use of cannabis for medical purposes is legal in 37 states, four out of five permanently inhabited U.S. territories, and the District of Columbia, as of February 2022. Eleven other states have more restrictive laws limiting THC content, for the purpose of allowing access to products that are rich in cannabidiol (CBD), a non-psychoactive component of cannabis. There is significant variation in medical cannabis laws from state to state, including how it is produced and distributed, how it can be consumed, and what medical conditions it can be used for.