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Description
The hardening hypothesis proposes that as the prevalence of smoking in a population declines, a greater proportion of the remaining smokers will have less motivation to quit, be more dependent on smoking, will make fewer quit attempts and will be less likely to quit

As you work out, your heart rate may potentially rise to dangerous levels, increasing your risk of death

It's also hard to stop

95% CI, 1.04-1.1) and never-drinkers were 16% more likely to develop thyroid cancer (aHR = 1.16

And I bet your dad would too
