dopamine from cigarettes Are Smokers Addicted To Dopamine? On Science: Can you smoke
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They deliver nicotine, which is addictive

All forms of tobacco are harmful and may jeopardize a persons health and wellbeing
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Even if you don't smoke, the smell of tobacco can infiltrate your home from a nearby apartment through vents, doorways, and cracks in the wall

However, it has been suggested that nicotine may augment the effects of leptin in the brain by enhancing leptin binding or increasing the sensitivity of downstream transduction cascades
CI = 2.29, 2.83), relative to college graduates, are more likely to smoke
