A few days ago FDA commissioner Scott Gottlieb was all over the news for his statement concerning maximum nicotine levels in cigarettes. As per the statement, reducing the levels of this addictive substance in cigarettes will help smokers to quit their habit easily. It is obvious that nicotine is addictive but is it all bad? Many people believe that nicotine gum is far less harmful than smoking. Doctors worldwide agree with it. Then why combustible cigarettes are risky to health?…