A report published in the Lancet Psychology found that high-potency Cannabis may increase the risk of psychosis and addiction. Researchers found individuals with first episodes of cannabis-related psychosis were more likely to have been using products with high levels of THC. Animal studies suggest higher doses of THC are more likely to cause addiction. This research likewise showed increased risk of addiction in those using high-potency products in comparison to low potency cannabis. Dr. Ziva Cooper of the UCLA Center for Cannabis and Cannabinoids noted the importance of understanding the long term health outcomes that may be associated with these types of products in comparison to what has been more traditionally available. Dr. Cooper further highlights how little research exists on the topic and notes the need for further studies especially those that look more closely at daily users.

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