From the hemp plant, Cannabis sativa. Because both hemp and marijuana are from the genus Cannabis, they are often thought (erroneously) to have similar properties. However, because hemp contains virtually no THC (delta-9-tetrahydrocannabinol), the active ingredient in marijuana, it is not used as a drug of any kind. In cosmetics, hemp seed oil is used as an emollient. Other claims about its effect on skin are not substantiated.