A new analysis represents the largest effort yet to systematically parse all the data from high-quality clinical trials on cannabis and mental health. The evidence is lacking.

Many people say they use cannabis for their mental health, but researchers find there is little to no evidence that cannabis can be beneficial for any psychiatric condition.

Medicinal cannabis might be increasingly available in many parts of the world, but a new review suggests it has no demonstrable benefit for depression or anxiety disorders. No proven benefit was ...

Marijuana doesn’t help with anxiety, PTSD, depression or other mental health conditions, according to two large, new studies.