A team of analysts from the U.K. has determined that years of study on marijuana have proven that the drug increases the risk of psychosis. The specific factors that cause the increased risk could not be proven, but researchers say the connection between marijuana and psychosis is undeniable.

"Doctors have long suspected a connection and say the latest findings underline the need to highlight marijuana's long-term risks. The research, paid for by the British Health Department, is being published Friday in medical journal The Lancet."

The team analyzed 35 studies that tracked tens of thousands of people for anywhere from one to 27 years. They looked for connections to both psychotic illnesses and cognitive disorders. Interestingly, no connection to cognitive disorders could be found. Read more at ABCLocal.go.com.

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Labels: long_term_drug_use, marijuana, psychosis