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The emerging harm of antioxidants in carcinogenesis

Colin Hart1, Richard Cohen, Michael Norwood

  • 1Department of Surgery, University Hospitals of Leicester, Leicester, UK. c.hart@doctors.org.uk

Future Oncology (London, England)
|June 1, 2012
PubMed

Insights

Fresh produce contains antioxidants that may fight cancer by reducing DNA damage. However, recent studies suggest some antioxidants might paradoxically promote cancer, warranting further research.

Area of Science:

  • Oncology
  • Nutritional Science
  • Molecular Biology

Background:

  • Epidemiologic studies suggest antioxidants in fresh produce may have anticancer properties.
  • Antioxidants combat oxidative stress, which can damage DNA and initiate cancer.
  • In vitro and animal studies show potential anticarcinogenic effects of these compounds.

Purpose of the Study:

  • To review the relationship between fresh produce, antioxidant supplements, and cancer risk.
  • To identify emerging trends and future research directions in this controversial area.
  • To evaluate the potential dual role of antioxidants in cancer prevention and promotion.

Main Methods:

  • Review of recent epidemiologic studies on diet and cancer.
  • Analysis of molecular data concerning antioxidant mechanisms.
  • Synthesis of findings from in vitro and animal research.

Main Results:

  • Evidence suggests a complex relationship between antioxidants and cancer risk.
  • Some antioxidants, despite in vitro benefits, may contribute to oncogenesis.
  • Contradictory findings highlight the need for nuanced interpretation.

Conclusions:

  • The role of antioxidants from fresh produce and supplements in human cancer prevention is controversial.
  • Emerging molecular data indicate a potential pro-cancer effect of certain antioxidants.
  • Further research is crucial to clarify the net impact of antioxidants on cancer development.

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