Nicotine in electronic cigarettes Journal of Umm Al Qura University for Applied Sciences Springer Nature Link 3 Charts Visual Study: The Link Between Vaping and Smoking in Kids E Cigarette Nicotine Levels E Cig Brands E Cigs & Oral Health: How Vaping Affects Gums & Teeth Electronic cigarettes (e cigarettes) are sometimes called e cigs, vapes, vape pens, and electronic nicotine delivery systems (ENDS). E cigarettes come in many shapes and sizes. Most e cigarettes contain nicotine. Get the facts about e cigarettes,