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Related Experiment Video

Updated: May 26, 2026

Changes in Mammary Gland Morphology and Breast Cancer Risk in Rats
09:36

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Published on: October 17, 2010

(n-6) PUFA increase and dairy foods decrease prostate cancer risk in heavy smokers.

Marian L Neuhouser1, Matt J Barnett, Alan R Kristal

  • 1Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA. mneuhous@fhcrc.org

The Journal of Nutrition
|June 23, 2007
PubMed
Summary
This summary is machine-generated.

Dietary fat intake showed no overall association with prostate cancer risk. However, higher dairy consumption was linked to a reduced risk of aggressive prostate cancer, especially in current smokers.

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Area of Science:

  • Nutrition Science
  • Epidemiology
  • Oncology

Background:

  • Previous research suggests a link between dietary fat and prostate cancer, but evidence is not conclusive.
  • Investigating specific dietary components like fats, meat, and dairy is crucial for understanding prostate cancer etiology.

Purpose of the Study:

  • To examine the association between dietary fat, meat, and dairy intake and the risk of developing prostate cancer.
  • To explore potential modifying effects of family history, race, and smoking status on these associations.

Main Methods:

  • A cohort of 12,025 men from the Carotene and Retinol Efficacy Trial (CARET) was followed for 11 years.
  • Dietary intake was assessed using a biannual Food Frequency Questionnaire (FFQ).
  • Cox proportional hazards models were employed to analyze the relationship between diet and prostate cancer incidence.

Main Results:

  • Overall dietary fat intake was not associated with total, nonaggressive, or aggressive prostate cancer.
  • Higher intake of polyunsaturated fats (PUFA), specifically (n-6) PUFA, showed a trend towards increased risk in men with a family history of prostate cancer.
  • Increased dairy intake was significantly associated with a reduced risk of aggressive prostate cancer (HR = 0.59).
  • Dairy foods demonstrated a protective effect against aggressive prostate cancer in current smokers (HR = 0.42).

Conclusions:

  • Prostate cancer risk associations with dietary fat may depend on the type of fat and specific food sources.
  • Host factors, including family history and smoking status, appear to modify the relationship between diet and prostate cancer risk.
  • Dairy consumption may play a protective role against aggressive prostate cancer, particularly in certain subgroups.