The most widespread form of consumption of tobacco is cigarettes, which have about 4,000 identified toxic components, among which are nicotine, tar, and carbon monoxide.
Nicotine, an alkaloid present in all compounds of tobacco, produces dependence. Nicotine is an addictive psychoactive drug that acts as a stimulant of the central nervous system.
This alkaloid is readily absorbed through the lungs and reaches the brain within seven to ten seconds; faster than if it had been injected intravenously, it has a direct effect on the body long term. Being a soluble alkaloid substance, it spreads throughout the body, starting its journey in the airways then through the bloodstream to the brain.