Dietary Changes May Enhance Prostate Cancer Survival Rates

A recent study suggests a dietary shift could improve survival chances for prostate cancer patients. Researchers at the Harvard T.H. Chan School of Public Health investigated the link between dietary fat and mortality in those with nonmetastatic prostate cancer, which pertains to a certain stage of the illness. They found a lower mortality risk associated with replacing animal and saturated fats with plant-based and unsaturated fats like olive oil and nuts.

The American Cancer Society states that approximately 1 in 8 men will face a prostate cancer diagnosis in their lifetime. This cancer accounts for 333,000 new U.S. cases annually and stands as the second leading cause of cancer death in men, following lung cancer. The study, published on September 2 in JAMA Network Open, reports that 1 in 44 men may die from prostate cancer.

Dr. Leonard Gomella, from Jefferson Medical College, highlighted these findings’ importance, noting they reinforce the role of dietary fats in prostate cancer progression. Dr. Arul Chinnaiyan of the Michigan Center for Translational Pathology remarked on the potential health benefits, although he clarified the connection with overall survival, not prostate cancer-specific mortality.

Study Findings

Researchers evaluated nearly 5,000 nonmetastatic prostate cancer patients, with an average diagnosis age of 69.5 and a median follow-up period of 12.8 years. During this time, over 3,000 patients died, including around 400 from prostate cancer, 500 from other cancers, and 800 from cardiovascular disease.

Higher post-diagnosis saturated fat intake correlated positively with all-cause mortality. Small dietary changes had significant effects; replacing 5% of carbohydrate calories with saturated or animal fat increased all-cause mortality risk. In contrast, replacing 5% of saturated fat calories with monounsaturated or plant-based fat reduced this risk.

Notably, substituting 5% of calories from carbohydrates with saturated fats led to a 15% rise in overall deaths. Comparatively, the Physicians’ Health Study mirrored these results, showing a 44% decrease in death risk when 10% of animal fat calories were swapped for plant-based fat.

Benefits of Plant-Based Fats

Dr. Daniel Petrylak from Yale University explained how high-fat diets may heighten inflammation markers, possibly accelerating prostate cancer growth. Reducing these markers could slow cancer progression. Petrylak added that cardiovascular disease is a common death cause among prostate cancer patients. Embracing a plant-based diet could enhance heart health and lower mortality rates.

Chinnaiyan mentioned that unsaturated fats found in plant sources can reduce LDL cholesterol, benefiting cardiovascular health. He cautioned about choosing the right plant oils, as coconut and palm oils, despite being plant-based, are high in saturated fats.

Implications of the Study

Chinnaiyan emphasized the significance of cardiovascular health for long-term survival in prostate cancer patients. Cardiovascular disease led to more deaths than prostate cancer, underscoring the importance of holistic patient care.

Gomella encouraged patients to make achievable dietary changes, such as using olive oil instead of butter and integrating nuts, seeds, or avocados, aligning with medical recommendations on dietary fats and prostate cancer. Yet, Chinnaiyan warned against overstating the benefits; dietary alterations could improve overall health but may not delay cancer progression or extend survival.