IPM doctors currently do not endorse or recommend the use of any medical marijuana or similarly derived products or extracts because they have potential to contain THC or similar psychoactive components and there is no real way to guarantee their safety or purity, regardless of the source. Additionally, current research and evidence suggest that THC and other fat-soluble compounds from cannabis can build up in the body and are not metabolically eliminated, presenting an additional potential risk of toxicity and other long term health risks.