THC Oil: Risks, Addiction, and How to Get Help How Long Does Marijuana (Weed) Stay in Your System? Can Marijuana Help Anxiety and Depression? Canna Mood Products for Depression and Burnout Society Here's how your dab pen and vape could affect your mental health National Geographic Because the teen brain is still developing, vaping and marijuana can have a bigger impact than most people realize. Dr. Raymond Pitetti shares the key facts every parent and teen should know.