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Cancers associated with high-fat diets.

C La Vecchia1

  • 1Istituto di Ricerche Farmacologiche Mario Negri, Milano, Italy.

Journal of the National Cancer Institute. Monographs
|January 1, 1992
PubMed
Summary

High fat intake correlates with increased cancer risk in population studies, particularly for colorectal and breast cancers. However, individual-level evidence remains weak and inconsistent across different study designs.

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Area of Science:

  • Nutritional Epidemiology
  • Oncology
  • Public Health

Background:

  • Population-level correlation studies suggest a link between dietary fat intake and common cancers (colorectum, breast, endometrium, ovary, prostate).
  • International and national correlations show direct associations between fat consumption and cancer incidence/mortality, even after adjusting for covariates.
  • Changes in cancer rates among migrant groups further support this association.

Purpose of the Study:

  • To investigate the association between dietary fat intake and the risk of developing common cancers.
  • To evaluate the strength and consistency of evidence from various epidemiological study designs.

Main Methods:

  • Review of correlation studies on international and national populations.
  • Analysis of data from migrant groups.
  • Examination of case-control and cohort studies for specific cancers.
  • Assessment of data from analytical studies for endometrial, ovarian, and prostate cancers.

Main Results:

  • Strong population-level correlations exist between high fat intake and increased incidence/mortality of colorectal, breast, endometrial, ovarian, and prostate cancers.
  • Case-control studies show a moderate association between high-fat/high-meat diets and colorectal cancer risk, with saturated fat implicated.
  • Evidence for breast cancer is weaker and inconsistent; cohort studies do not support the association.
  • Limited data for endometrial, ovarian, and prostate cancers suggest a possible relationship with high-fat diets.

Conclusions:

  • While population studies indicate a link between fat intake and several cancers, the association is weak and inconsistent at the individual level.
  • Epidemiological evidence, particularly from cohort studies, is insufficient to definitively prove the link between dietary fat and cancer risk.
  • Further research is needed to clarify the complex relationship between dietary fat and cancer, considering different cancer types and study methodologies.

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