Best Dry Herb Vape of 2025 Here's how your dab pen and vape could affect your mental health National Geographic How Long Does Marijuana (Weed) Stay in Your System? Vapes are harmful and can be highly addictive. Some disposable vapes have nearly tripled in nicotine strength in the span of only 5 years. 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. Can Marijuana Help Anxiety and Depression?