Hair : Nicotine and cotinine can be detected for up to 90 days
Second, if multiple risk estimates with different adjustment levels were reported in a given study, we included only the fully adjusted risk estimate and modeled the adjustment level according to the number of covariates adjusted for (rather than which covariates were adjusted for) and whether a standard adjustment for age and sex had been applied
Morbidity and Mortality Weekly Report
Is there a health benefit of reduced tobacco consumption
Heart rate and blood pressure normalize within 20 minutes, oxygen levels improve within 12 hours, lung function and circulation enhance over weeks, and long-term, the risk of serious diseases like cancer and heart disease significantly decreases
My stance was the same -- it never changed, except only when I was imitating the stances of famous baseball players (the batting stance guy wasn't the first person to do that)