All tobacco products are dangerous to human health, including those produced and sold in compliance with tobacco control and excise/customs laws. However, illicit trade in tobacco matters because it harms individual and population health in additional ways. By increasing the affordability and sometimes also the availability of tobacco products, illicit trade can reduce the power of tax increases to encourage individuals who smoke to cut consumption or quit altogether.
Accurately quantifying the extent of illicit trade in tobacco also matters. It matters because tobacco companies exaggerate it.