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Start the free quiz What are the side effects & risks of smoking cigarettes Cigarettes contain nicotine and over 4,000 chemicals as well as releasing harmful gases such as carbon monoxide

Mark Rubinstein, of UCSFs Division of Adolescent Medicine, and colleagues tested 67 teenagers who vape and compared them to 16 teens who both vape and smoke tobacco cigarettes and to 20 teens who do not use either type of cigarette

It could also help you provide support in case you have a loved one who suffers from substance use disorder

Having really high good cholesterol doesnt mean you dont have to worry about your bad cholesterol, he points out