What Causes Tobacco Addiction?
Nicotine is absorbed easily from tobacco smoke in the lungs. It also is absorbed from smokeless tobacco through the inner lining of the mouth. Within seconds, it travels through the bloodstream to the brain. There it signals the brain to release chemicals that make people want to smoke more. The effect is very powerful. Some people find it especially hard to kick tobacco addiction. The younger people are when they start smoking, the harder it is to quit and the greater the risk to their health.
