does smoking one cigarette make you addicted 3 Ways to Keep Systematically Without Getting Quit Smoking | Fact Sheets

The dopamine hit delivers good feelings and, over time, the brain begins to crave that feeling

Lang PJ, Bradley MM, Fitzsimmons JR, Cuthbert BN, Scott JD, Moulder B, et al

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WalletHubs formula for total lifetime cost has five components: out-of-pocket cost (one pack of cigarettes per day for 51 years), financial opportunity cost (defined as the amount of return a person would have earned by instead investing that money in the stock market), health care cost (spending on treatment for smoking-related health complications), income loss (an average 8% decrease caused by absenteeism and lost productivity), and other costs (loss of a homeowners insurance credit and costs of secondhand exposure)