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The causes of tobacco addiction encompass biological, social, and environmental factors, according to a study by Smoke-Free titled Reasons People Smoke. At the core of tobacco addiction is nicotine , a powerful psychoactive substance that leads to changes in brain chemistry, fostering dependence

[Nicotine] can really change the chemistry of their brains while their brains are still developing, he says

Results were normalized to the housekeeping gene -Actin labeled with VIC dye

Additionally, nicotine has been shown to have a more pronounced impact on the brains reward pathways, contributing to its addictive nature

Chronic intoxication is often developed by heavy and long-term smokers

Common nicotine withdrawal symptoms like irritability, fatigue, and headaches tend to peak within the first 72 hours