Tobacco firms used diet-aid chemicals.

British and American tobacco companies deliberately added powerful appetite-suppressing chemicals to cigarettes to attract people worried about their weight, according to internal industry documents dating from 1949 to 1999. Chemical additives are just one of several strategies successfully used by tobacco companies over the past 50 years to convince people that smoking makes you thin. Tobacco giants Philip Morris and British American Tobacco added appetite suppressants to cigarettes, according to the documents, released during litigation in the US. Four other major companies tested potential chemicals, including amphetamine and nitrous oxide, better known as laughing gas, but the …