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Related Experiment Videos

Nutrition and bladder cancer

C La Vecchia1, E Negri

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

Cancer Causes & Control : CCC
|January 1, 1996
PubMed
Summary
This summary is machine-generated.

A diet rich in fruits and vegetables may lower bladder cancer risk. While evidence is suggestive, more research is needed to confirm the impact of specific nutrients and dietary patterns on bladder cancer prevention.

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Area of Science:

  • Epidemiology
  • Nutritional Science
  • Oncology

Background:

  • Diet and nutrition play a plausible role in bladder cancer development due to urinary excretion of metabolites.
  • International variations in bladder cancer rates suggest potential dietary influences, with higher rates in Europe than the US.

Purpose of the Study:

  • To review epidemiologic evidence on the relationship between diet, nutrition, and bladder cancer.
  • To identify dietary factors associated with altered bladder cancer risk.

Main Methods:

  • Systematic review of ten case-control and three cohort studies published between 1979 and 1994.
  • Analysis focused on dietary factors, including fruit and vegetable consumption, macronutrients, and micronutrients.

Main Results:

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  • Six of seven studies indicated reduced bladder cancer risk with increased fruit and vegetable intake, particularly vegetables (RR 0.5-0.7).
  • Total fat intake showed a potential association with increased risk in some case-control studies (RR 1.4-1.7), but not consistently.
  • Carotenoids (Vitamin A) showed an inverse association in four case-control studies, but data for other vitamins (C, E), protein, carbohydrates, calcium, and sodium were inconclusive.

Conclusions:

  • Suggestive evidence indicates that a diet high in fruits and vegetables, potentially due to carotenoids, is associated with a reduced bladder cancer risk.
  • Current data remain inconclusive, highlighting the need for more robust cohort studies with detailed dietary assessments to confirm these associations.