How Nicotine Affects People
Nicotine is a highly additive substance that is added to tobacco. When you choose to light up a cigarette or use smokeless tobacco, one to two milligrams of nicotine is released into the body. Through cigarettes, nicotine is absorbed directly through the lungs, and with smokeless tobacco, it is absorbed through the nose. From there, nicotine will spread throughout the body, causing many harmful effects. Nicotine can cause permanent damage through the effects it has on the body.