Nicotine Say: nih-kuh-teen This chemical is found in cigarettes and is the reason why kids (and others) get hooked on the smoking habit. So say no to nicotine – it's nasty! Back to Articles Related Articles Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.