A recent study from **University College London** asserts that each cigarette reduces life expectancy by **20 minutes**.
This translates to a loss of nearly **seven hours** in life expectancy from smoking a **pack of 20 cigarettes**.
The findings show that the life expectancy loss from smoking is greater than earlier predictions of **11 minutes per cigarette** made in 2000.
Quitting smoking early in life can restore life expectancy to levels comparable to those who have never smoked, although benefits diminish with age.
Despite declining smoking rates, it remains the leading cause of preventable disease in the U.S., with **28.8 million** adults reported as smokers in 2022.