what is the active ingredient in tobacco that causes addiction Many Dangers of Use Most tobacco products, including e-cigarettes,

Most tobacco products, including e cigarettes, contain nicotine, a chemical that can harm the heart, brain and whole body. As with other addictive products, using a nicotine product builds tolerance, leading to more What chemicals are in a cigarette? What does smoking do to your body? Cancer Research UK Cigarette smoke contains thousands of chemicals, many of which are toxic and harmful to the human body. Here's a detailed breakdown of some of the most dangerous constituents and their effects: 1. What Makes Cigarettes Addictive: Is It Nicotine or Tobacco? Why don't smokers quit? ASH > Action on Smoking & Health

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