THC is the psychoactive cannabinoid that is responsible for the high that is associated with marijuana. CBD on the other hand is non-psychoactive, but has plenty of therapeutic uses. Hemp oil is an alternative to medical marijuana for those who are interested in using CBD but are looking to avoid the negative effects of psychoactive THC. The major differences between the hemp plant and marijuana is the difference in concentration of CBD and THC cannabinoids. Generally, the hemp plant contains more CBD than THC, while marijuana contains more THC than CBD. Hemp CBD is a very effective dietary supplement or as a pain reliever. But, USE ONLY Organic hemp extracts and always look for clear labeling. They’re both effective. One may be more effective than the other from person to person.