You’re at a party and a friend hands you a vape pen, saying it will help you relax. Should you take it? Before you puff, know that the vape is full of a highly addictive chemical called nicotine. When you consider all the negative effects of nicotine use, you’ll probably agree that vaping is not relaxing, it’s downright stressful. Short term, nicotine use can give you stained teeth, bad breath, cavities, and mouth sores. Long-term use doubles your risk of dying from cancer. And research suggests that teens’ developing brains are more susceptible to becoming addicted to nicotine. A habit that is gross, expensive, and could ultimately kill you? Thanks, but no thanks. Read on for all the ways nicotine affects your body, mind, and mood.