Drinking Coffee Linked to Lower Prostate Cancer Risk

If you’re a man wondering whether your daily coffee habit could actually protect your long-term health—especially when it comes to prostate cancer—you’re not alone. A major long-term study provides some clear, data-backed answers.

Yes, drinking coffee—regular or decaf—may significantly reduce your risk of developing prostate cancer. Men who drank six or more cups per day had nearly 20% lower risk of prostate cancer over 20 years, and a 60% lower risk of fatal prostate cancer compared to non-coffee drinkers.

The Harvard Study on Coffee and Prostate Cancer

Researchers from Harvard University tracked 47,911 men over more than two decades, regularly collecting data on their coffee intake. The findings, published in The Journal of the National Cancer Institute, mark the first study to directly link higher coffee consumption with a reduced risk of prostate cancer.

Over the 20-year period, those who consumed six or more cups of coffee daily showed nearly a 20% lower risk of developing any form of prostate cancer. More strikingly, their risk of developing fatal prostate cancer was 60% lower than in men who didn’t drink coffee at all.

Even Moderate Coffee Drinking Helps

The protective effect wasn’t limited to heavy coffee drinkers. Men who drank just one to three cups per day still saw a 30% reduction in their risk of lethal prostate cancer. That means even a few cups make a measurable difference.

The type of coffee—caffeinated or decaffeinated—didn’t change the results. Both forms were equally associated with lower prostate cancer risk, suggesting that compounds other than caffeine are likely responsible for the benefit.

Why Coffee May Protect Against Prostate Cancer

Coffee is one of the richest dietary sources of antioxidants, which help combat cellular damage and inflammation—two factors linked to cancer development. Previous research has also connected coffee consumption to a lower risk of type 2 diabetes, adding to the evidence that regular coffee intake supports overall metabolic and cellular health.

While researchers aren’t advising men to drastically increase their coffee intake based on these findings, the consistent data suggests that those who already drink coffee can feel more confident about its potential health perks.

Frequently Asked Questions

How many cups of coffee reduce prostate cancer risk?

Men who drank six or more cups of coffee per day had nearly 20% lower risk of prostate cancer, and a 60% lower risk of fatal prostate cancer over 20 years. Even one to three cups per day was linked to a 30% lower risk of fatal prostate cancer.

Does decaf coffee reduce prostate cancer risk too?

Yes. The study found that both caffeinated and decaffeinated coffee were associated with lower prostate cancer risk, indicating that caffeine is not the key factor in the protective effect.

What kind of prostate cancer risk was reduced?

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

How long was the coffee study conducted?

The research followed 47,911 men for over 20 years, making it one of the longest-running studies on coffee consumption and prostate cancer risk.

What’s in coffee that might protect against cancer?

Coffee is rich in antioxidants, which may help reduce cellular damage and inflammation. These compounds, along with others in coffee, are believed to contribute to its potential cancer-protective effects, though the exact mechanisms are still being studied.

Recommended FrontStreet Beans for Coffee Lovers

For those enjoying multiple cups a day, try FrontStreet Coffee’s Ethiopia Humbera for bright citrus and floral notes, or Yirgacheffe for juicy berry and stone fruit complexity. Both single origins highlight coffee’s natural antioxidants and vibrant profiles. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.