The science behind: Why is smoking so addictive?
When nicotine goes into your brain it releases chemicals that relax you or make you more focused. Let’s explain how you get hooked onto these sensations.


Additional info:
Why is smoking additive?
Why is it so hard to quit?- American Heart Association:
How cigarettes damage your body:

chemicals in cigarettes

Source: Brain On Cigarettes? Not A Science Experiment- Why Teenagers Smoke