Dietary fat type may matter after prostate cancer

The association was driven by cardiovascular disease and other cancers, not prostate cancer mortality.

By
Andrea Surnit
September 29, 2026
4 min

MDSpire News

Overview

This study found that replacing saturated or animal fats with monounsaturated or plant-based fats was associated with greater all-cause mortality among patients with nonmetastatic prostate cancer.

Background

Prostate cancer is a prevalent condition among men, and understanding modifiable factors that influence survival is crucial. Dietary fat intake has been implicated in cancer outcomes, yet its specific role in prostate cancer survivorship remains unclear. This study aims to clarify the relationship between dietary fat types and mortality in patients with nonmetastatic prostate cancer.

Data Highlights

Outcome	Mortality Rate
All-cause mortality (highest vs lowest quintile of saturated fat)	24% higher
10-year all-cause mortality (highest vs lowest quintile)	26% vs 23%
Cardiovascular mortality (highest vs lowest quintile of saturated fat)	42% higher
Mortality from other cancers (highest vs lowest quintile of saturated fat)	42% higher (not statistically significant)
All-cause mortality (5% calories from saturated fat replaced with monounsaturated fat)	20% lower
All-cause mortality (10% calories from animal fat replaced with plant-based fat)	16% lower

Key Findings

Higher saturated fat intake after diagnosis was linked to increased all-cause mortality.
Replacing saturated fat with monounsaturated fat was associated with a 20% reduction in all-cause mortality.
Replacing animal fat with plant-based fat was associated with a 16% reduction in all-cause mortality.
No significant association was found between dietary fat intake and prostate cancer-specific mortality.
Higher monounsaturated fat intake correlated with lower cardiovascular mortality.
Study limitations include reliance on self-reported dietary data and a predominantly White cohort.

Clinical Implications

Healthcare professionals should consider dietary fat types when advising patients with nonmetastatic prostate cancer, as certain fats may influence overall mortality. Emphasizing plant-based and monounsaturated fats could be beneficial in survivorship care.

Conclusion

This study highlights the potential impact of dietary fat type on mortality in patients with nonmetastatic prostate cancer, suggesting that dietary modifications may be a relevant aspect of post-diagnosis care.