Just to chuck summat into the middle here's some, only some, ingredients in cigarettes, and it's supposed to be regulated? Apart from that, at £8 ish a packet of 20 (some now 19) I can't afford to smoke, well, and eat.
Ammonia: Household cleaner
Angelica root extract: Known to cause cancer in animals
Arsenic: Used in rat poisons
Benzene: Used in making dyes, synthetic rubber
Butane: Gas; used in lighter fluid
Carbon monoxide: Poisonous gas
Cadmium: Used in batteries
Cyanide: Deadly poison
DDT: A banned insecticide
Ethyl Furoate: Causes liver damage in animals
Lead: Poisonous in high doses
Formaldehiyde: Used to preserve dead specimens
Methoprene: Insecticide
Megastigmatrienone: Chemical naturally found in grapefruit juice
Maltitol: Sweetener for diabetics
Napthalene: Ingredient in mothballs
Methyl isocyanate: Its accidental release killed 2000 people in Bhopal, India in 1984
Polonium: Cancer-causing radioactive element
Ammonia: Household cleaner
Angelica root extract: Known to cause cancer in animals
Arsenic: Used in rat poisons
Benzene: Used in making dyes, synthetic rubber
Butane: Gas; used in lighter fluid
Carbon monoxide: Poisonous gas
Cadmium: Used in batteries
Cyanide: Deadly poison
DDT: A banned insecticide
Ethyl Furoate: Causes liver damage in animals
Lead: Poisonous in high doses
Formaldehiyde: Used to preserve dead specimens
Methoprene: Insecticide
Megastigmatrienone: Chemical naturally found in grapefruit juice
Maltitol: Sweetener for diabetics
Napthalene: Ingredient in mothballs
Methyl isocyanate: Its accidental release killed 2000 people in Bhopal, India in 1984
Polonium: Cancer-causing radioactive element