(Indica) whole plant RSO (Rick Simpson Oil). RSO is a great option for patients who don’t want to vaporize or are uncomfortable swallowing capsules. Used orally, RSO can be absorbed through the mouth sublingually, or swallowed and ingested. RSO is the perfect form of medical marijuana to be added to at-home recipes. Our whole plant RSO is produced utilizing a vacuum distillation process, which distills out the solvent and preserves terpenes that would otherwise be lost to open air distillation.