Vaping may seem harmless, but many products contain nicotine, toxic chemicals, and ultra fine particles that can damage the lungs and heart. For teens, nicotine can also affect brain development, attention, mood, and Study finds depressed adolescents twice as likely to vape DEPRESSION STICK Truth Initiative Mojo Supermarket Some vapes have as much nicotine as 15+ packs of cigarettes. Nicotine withdrawal symptoms include anxiety and depressed mood, so nicotine dependence may compound stress and mental health symptoms. Get help today: