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Evidence supporting product standards for carcinogens in smokeless tobacco products

Dorothy K Hatsukami1, Irina Stepanov2, Herb Severson3

  • 1University of Minnesota, Masonic Cancer Center, Minneapolis, Minnesota. Department of Psychiatry, University of Minnesota, Minneapolis, Minnesota. hatsu001@umn.edu.

Cancer Prevention Research (Philadelphia, Pa.)
|December 20, 2014
PubMed

Insights

Reducing tobacco-specific nitrosamines (TSNA) in smokeless tobacco is crucial for lowering carcinogen exposure. Product standards targeting TSNA levels are essential for public health, regardless of nicotine content or usage patterns.

Area of Science:

  • Toxicology
  • Public Health
  • Tobacco Control

Background:

  • Smokeless tobacco products in the U.S. exhibit wide variations in nicotine and tobacco-specific nitrosamine (TSNA) yields.
  • The Food and Drug Administration has regulatory authority to set product standards for tobacco products.
  • Limited data exist on the comparative impact of smokeless tobacco use patterns versus constituent levels on user carcinogen exposure.

Purpose of the Study:

  • To investigate the role of smokeless tobacco constituent levels, specifically TSNA, in carcinogen exposure.
  • To differentiate the impact of TSNA levels from usage patterns on user exposure to carcinogens.
  • To inform potential product standards for smokeless tobacco.

Main Methods:

  • Recruited smokeless tobacco users from three U.S. regions, representing brands with varying nicotine and TSNA content.
  • Collected demographic and detailed smokeless tobacco use history.
  • Analyzed urine samples for biomarkers of exposure and effect.
  • Utilized daily diary cards to record amount and duration of smokeless tobacco use.

Main Results:

  • Levels of TSNA in smokeless tobacco products significantly influenced carcinogen exposure levels.
  • This effect was independent of the pattern of smokeless tobacco use and nicotine yields.
  • Higher TSNA content correlated with increased exposure biomarkers.

Conclusions:

  • Reducing TSNA levels in smokeless tobacco products is a necessary strategy to decrease user exposure to carcinogens.
  • Implementing product standards for TSNA reduction can potentially lower cancer risk associated with smokeless tobacco use.
  • Regulatory action on TSNA content is a vital public health intervention.

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