Nicotine Salt E Liquids: The Best Flavors for E Cigarettes Health officials struggled to explain in plain language the difference between freebase nicotine and nicotine salt in vape products during a House hearing Monday, prompting sharp exchanges from lawmakers weighing possible tax Vaping and Quitting Smoking and Tobacco Use CDC Nicotine Withdrawal and Vaping StoryMD Nicotine is especially addictive for young people and can make it harder to learn and focus. Nicotine withdrawal can worsen stress and mental health symptoms. Learn more about the risks of vaping