80% of all lung cancer cases are due to tobacco, but not all smokers respond the same way. A study by the French Inserm, led by Simone Benhamou, analyzes the relationship between lung cancer by tobacco and an enzyme.
130 smokers affected by cancer and 160 smokers without cancer have been analyzed. It has been proven that the CYP2D6 enzyme, in people who burn a lot and are at high risk, works a lot to transform cigarette smoke into a toxic substance.