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Dr. Goniewicz: E-cig users reduce carcinogens intake by 64 percent in Week 1

World-class oncologist Dr. Maciej Goniewicz has released a new vaping study which contradicts prior claims by anti-vaping lobbyists that e-cig vapor is just as toxic as cigarette smoke. An Associate Professor of Oncology at the Roswell Park Cancer Institute, Goniewicz compiled a team of scientists with the original goal of identifying possible carcinogens related to vaping. Not only did the researchers discover that the vapor from e-cigarettes has less carcinogens, the users’ intake rates are dramatically reduced by as much as 64 percent when compared to conventional Nicotine Replacement Therapies (NRTs) of Big Pharma.

The Goniewicz vaping study

The team of scientists started with a small control group of twenty long-term smokers. They collected urinary biomarker samples of each participant and measured for numerous carcinogens and other noxious chemicals, including the following.

  • 17 carcinogens commonly associated with tobacco
  • 13 carcinogens associated with cigarette smoke
  • 8 volatile organic compounds (VOCs)
  • oPropylene oxide
  • oEthylene oxide
  • oCrotonaldehyde
  • oBenzene
  • oAcrylonitrile
  • oAcrylamide
  • oAcrolein
  • o1,3-Butadiene
  • 4 polycyclic aromatic hydrocarbons:
  • oPyrene
  • oPhenanthrene
  • oNaphthalene
  • oFluorene

The research team measured for the above-listed agents both before the twenty participants switched to vaping as well as after they had successfully made the transition. The biomarkers were measured after one and two-week post-vaping timeframes.


The Goniewicz vaping study named Exposure to Nicotine and Selected Toxicants in Cigarette Smokers Who Switched to Electronic Cigarettes: A Longitudinal Within-Subjects Observational Study is published on the Oxford Academic website. In the conclusions section of the research paper, the scientists claim that each of the measurable carcinogens were “substantially reduced.”

“After switching from tobacco to e-cigarettes, nicotine exposure remains unchanged, while exposure to selected carcinogens and toxicants is substantially reduced.”

“To our knowledge, this is the first study that demonstrates that substituting tobacco cigarettes with an e-cigarette may reduce user exposure to numerous toxicants and carcinogens otherwise present in tobacco cigarettes. Data on reduced exposure to harmful constituents that are present in tobacco cigarettes and e-cigarettes can aid in evaluating e-cigarettes as a potential harm reduction device.”

While the levels of nicotine in the participants’ bloodstreams remained relatively unchanged between the smoking vs. vaping stages of the study, quantities of a tobacco-specific nitrosamine feel sharply by 57 percent in Week 1 alone. They fell to 64 percent the following week. And levels of hydroxyfluorene plummeted by 46 percent and 34 percent during the same milestones.

These are just a few of the statistics cited in the Goniewicz vaping study. The cancer specialist also notes that 45 percent of the participants remained smoke-free after the study’s conclusion, which supports recent research published by Penn State University that indicates vaping is comparatively far less addictive than smoking.