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Proctor argues in his book that cellulose acetate filters are a gimmick and a fraud. Filters were put on the ends of cigarettes for three principal reasons, he writes, to lower the cost of manufacturing, to keep tobacco bits from entering the mouths of smokers, and to lure people into thinking that brand Alpha, Beta or Gamma was somehow safer. Although filters prevent some quantity of carcinogens from entering a smokers lungs, Proctors graduate student, Bradford Harris, who has studied the early history of cigarettes, said in an interview that overwhelming data suggest that filters are ineffective. Novotny of San Diego State University agrees

What Is Covered Under Cigarette Filters Market

While some studies suggest that smoking does not have a significant impact on testosterone levels, other studies have reported higher levels of total and free testosterone in male smokers compared to non-smokers

Tar is the name for a specific fraction of cigarette smoke