Eating forty tablespoons of peanut butter gives you one micromort because you risk ingesting aflatoxin, a fungal toxin that increases your risk of liver cancer later in life. Smoking a single cigarette gives you 0.7 micromorts, increasing your chance of dying of lung cancer many years down the line. Taking this into account, smoking one cigarette reduces life expectancy by five minutes—about the same length of time it takes to smoke it.
