Overview
- A JAMA Network Open study published in September 2026 analyzed 4,884 men with nonmetastatic prostate cancer from the Health Professionals Follow‑Up Study and followed them for a median 12.8 years.
- Men with the highest post‑diagnosis saturated fat intake had a 24% higher rate of death from any cause (HR 1.24, 95% CI 1.05–1.47), and higher saturated fat was linked to increased cardiovascular deaths (HR 1.42, 95% CI 1.02–1.98).
- Animal fat intake was associated with more deaths from cancers other than prostate cancer (HR 1.49, 95% CI 1.00–2.21), while there was no clear link between fat types and prostate cancer‑specific mortality.
- Statistical models estimated that swapping about 10% of calories from animal fats for plant‑based fats reduced all‑cause mortality risk (HR 0.84) and replacing 5% of calories from saturated fat with monounsaturated fat reduced risk (HR 0.80).
- Authors and commentators stress the study is observational and mostly involved white U.S. men, so clinicians should use these findings to counsel survivors on heart‑healthy food swaps such as olive oil, nuts, seeds, and avocados without presenting dietary change as a proven prostate cancer treatment.