Cigarettes may contain traces of pig's blood, an Australian academic says with a warning that religious groups could find its undisclosed presence 'very offensive'.
University of Sydney Professor Simon Chapman points to recent Dutch research which identified 185 different industrial uses of a pig - including the use of its haemoglobin in cigarette filters.
Prof Chapman said the research offered an insight into the otherwise secretive world of cigarette manufacture, and it was likely to raise concerns for devout Muslims and Jews.
