Rick Simpson Oil (RSO) is a cannabis extract known for its high concentrations of THC (tetrahydrocannabinol) and CBD (cannabidiol). It is named after Rick Simpson, a Canadian who claimed to have cured his skin cancer using RSO in the early 2000s.

RSO is typically made by soaking cannabis plant material in a solvent, such as ethanol or isopropyl alcohol, to extract the cannabinoids and other beneficial compounds. The mixture is then filtered and the solvent is evaporated, leaving behind a thick, dark oil that is high in THC and CBD.
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