carcinogen present in cigarette smoke is Tobacco carcinogens, their biomarkers and tobacco-induced cancer Dysregulation of immunity by cigarette

Chemical Research in Toxicology 14 , 767790, (2001)

The smokers were told the point of the study was to see how well they understood the labels on their cigarette packs

Bullet in the Head is also Woos protest against the universally corrupting nature of political strife, as we see in an early scene set during the 1967 Hong Kong riots, and then later in sequences that recreate/allude to the Tiananmen Square protest and the now-infamous Saigon execution photo (Woo was an anti-Vietnam War activist in 1969 and 1970)

Archived from the original on December 9, 2016

In some countries, like France, criminal networks profiting from the illicit tobacco trade are prevailing, with 33.2 percent of all cigarettes consumed originating from the black market