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Nutritional factors in human cancers.

E Giovannucci1

  • 1Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA.

Advances in Experimental Medicine and Biology
|March 29, 2000
PubMed
Summary

Diet and nutrition significantly impact cancer development by influencing genetic damage and hormone levels. Western dietary patterns, high in processed foods and low in fiber, combined with inactivity, increase cancer risk, particularly in the breast, colon, and prostate.

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Area of Science:

  • Oncology
  • Nutritional Science
  • Epidemiology

Background:

  • Carcinogenesis is influenced by genetic susceptibility and external factors like oxidative compounds, infections, and hormonal imbalances.
  • Diet and nutrition play a crucial role by providing bioactive compounds and modulating hormone levels, impacting cancer development.
  • Specific dietary patterns are linked to significant variations in cancer incidence across populations.

Purpose of the Study:

  • To explore the complex interplay between diet, nutrition, hormonal factors, and carcinogenesis.
  • To investigate the contribution of Western dietary patterns to the prevalence of specific cancers.
  • To understand the etiological factors behind upper gastrointestinal tract cancers in less economically developed countries.

Main Methods:

  • Review of epidemiological studies and scientific literature on diet, nutrition, hormones, and cancer.
  • Analysis of the impact of processed foods, fiber intake, and physical activity on cancer risk.
  • Examination of hormonal modulators like IGF-1, insulin, estrogen, and vitamin D in relation to cancer.
  • Comparison of cancer prevalence and dietary practices between Western and less economically developed countries.

Main Results:

  • Western diets, characterized by energy-dense, refined foods and low fiber, contribute to obesity and elevated growth-promoting hormones (IGF-1, insulin, estrogen, testosterone).
  • High consumption of dairy and meat is associated with prostate cancer, potentially due to decreased levels of the differentiating hormone 1.25(OH)2 vitamin D.
  • Upper gastrointestinal tract cancers are more prevalent in less developed regions, linked to food preservation methods exposing the mucosa to irritants and carcinogens.

Conclusions:

  • Nutritional modulation of hormones is a key factor in the high incidence of breast, colorectal, and prostate cancers in Western societies.
  • Dietary factors and physical inactivity are significant contributors to obesity and hormone-driven carcinogenesis.
  • Food preservation practices, rather than refrigeration, are implicated in the higher rates of upper gastrointestinal cancers in certain populations.

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