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Rick Simpson Oil, or RSO, is a full extract cannabis oil meant to be taken orally or applied topically. RSO is a marijuana extract made utilizing a solvent to extract cannabinoids. The most common solvent used to produce RSO is grain alcohol, but some other solvents like ethanol or butane are sometimes used. Flower (bud) material is placed in a large container and alcohol is added. The entire mixture is stirred and crushed into the alcohol. After a time, the alcohol is drained from the remaining plant material. That mixture is then heated in a container, such as a rice cooker, so that the residual alcohol evaporates. The end product is a high potency oil often dark in color with a thick consistency. RSO can be siphoned into a syringe style applicator for dosing which offers the advantage of a long shelf life as oxidation does not easily occur.
