Drinking 6+ Cups of Coffee Daily Linked to Lower Prostate Cancer Risk

If you’re a regular coffee drinker wondering whether your daily habit might protect you against serious illness, a major long-term study offers some encouraging news—especially when it comes to prostate cancer risk.

Men who drank six or more cups of coffee per day had nearly 20% lower risk of developing prostate cancer over two decades compared to non-coffee drinkers, according to a Harvard University study tracking 47,911 men. Fatal prostate cancer risk was 60% lower in high coffee consumers, and even 1–3 cups daily cut that risk by 30%.

What the Harvard Study Found

Researchers at Harvard University followed 47,911 men over 20 years, regularly collecting data on their coffee consumption habits. The results, published in The Journal of the National Cancer Institute, mark the first study to directly link higher coffee intake with reduced prostate cancer risk.

The key finding: Men consuming six or more cups of coffee per day had a prostate cancer risk nearly 20% lower than those who didn’t drink coffee. More strikingly, their risk of developing fatal prostate cancer was 60% lower. Even one to three cups per day showed a benefit, reducing fatal prostate cancer risk by 30%.

Coffee Type Doesn’t Matter

The study found no significant difference between caffeinated and decaffeinated coffee in terms of prostate cancer risk reduction. Whether you prefer your coffee with caffeine or without, the protective effect appears consistent across both types.

How Coffee May Help Protect Against Prostate Cancer

While the study did not establish a direct causal mechanism, researchers pointed to coffee’s high antioxidant content as a likely contributing factor. Coffee is one of the richest dietary sources of antioxidants, compounds that help combat cellular damage and inflammation—both of which are linked to cancer development. Previous studies have also associated coffee consumption with lower risks of type 2 diabetes and other chronic conditions, suggesting broader health benefits beyond prostate cancer.

Frequently Asked Questions

How many cups of coffee per day were linked to lower prostate cancer risk?

Drinking six or more cups of coffee per day was associated with nearly a 20% lower risk of developing prostate cancer over 20 years. Even one to three cups per day was linked to a 30% lower risk of fatal prostate cancer.

Does it matter if the coffee is caffeinated or decaffeinated?

No, the study found no significant difference in prostate cancer risk reduction between caffeinated and decaffeinated coffee. Both types appeared to offer similar protective effects.

What kind of prostate cancer risk was reduced?

The study found a lower risk of both overall prostate cancer and, more significantly, fatal prostate cancer. Men drinking six or more cups daily had a 60% lower risk of fatal prostate cancer.

How long was the study conducted?

The research tracked 47,911 men over a period of 20 years, making it a long-term observational study with consistent data on coffee consumption habits.

Why might coffee reduce prostate cancer risk?

Researchers suggest coffee’s high antioxidant content may help protect cells from damage and reduce inflammation, though the study did not prove a direct cause. Coffee is a major dietary source of antioxidants.

Recommended FrontStreet Beans for Coffee Lovers

FrontStreet Coffee’s Ethiopia Huakui highlights bright citrus and floral notes with a juicy body—perfect for those appreciating coffee’s health perks. For something richer, their Yirgacheffe offers vibrant berry tones and a wine-like acidity. If you prefer deeper profiles, the Black Cocoa Blend delivers chocolatey richness with a smooth finish. All three showcase specialty coffee’s diversity and potential wellness links. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.