How Drinking Coffee Lowers Skin Cancer Risk

If you’re someone who spends a lot of time outdoors—or just worries about skin cancer risks—here’s a simple habit that might help: drinking coffee. More specifically, drinking caffeinated coffee regularly has been linked to a lower chance of developing the most common type of skin cancer.

According to a major study from Harvard Medical School, people who drink three or more cups of caffeinated coffee per day significantly lower their risk of basal cell carcinoma—the most frequently diagnosed skin cancer worldwide.

What the Harvard Study Found

Researchers at Harvard Medical School analyzed health data from over 112,000 participants across two long-term studies: the Health Professionals Follow-Up Study and the Nurses’ Health Study. These individuals were tracked for more than 20 years.

The findings showed a clear pattern: women who drank three or more cups of caffeinated coffee per day had a 21% lower risk of developing basal cell carcinoma compared to those who drank less than one cup per month. For men, the risk reduction was slightly lower but still significant—a 10% decrease.

Why Caffeine Matters

The protective effect was specifically tied to caffeine found in coffee—not just any hot beverage. Researchers also observed similar risk reductions among people who regularly consumed other caffeinated products like tea and chocolate. However, these did not show the same level of risk-lowering benefit for other types of skin cancer.

Importantly, decaffeinated coffee showed no association with reduced risk of basal cell carcinoma. This strongly suggests that caffeine is the active compound providing the protective effect.

What About Other Skin Cancers?

The study found that while caffeinated coffee and related products helped lower the risk of basal cell carcinoma, they did not reduce the risk of other forms of skin cancer such as squamous cell carcinoma or melanoma—the deadliest form of skin cancer.

Basal cell carcinoma is the most common type, accounting for over half of all skin cancer cases in Western countries. According to the U.S. National Cancer Institute, around one million Americans receive treatment for basal cell carcinoma each year.

How Caffeine May Protect Against Cancer

Previous studies on mice have demonstrated that caffeine can inhibit tumor growth. This human study supports the idea that caffeine may play a similar role in people, though further research is needed to fully understand the biological mechanisms involved.

Frequently Asked Questions

How many cups of coffee reduce skin cancer risk?

Drinking three or more cups of caffeinated coffee per day is associated with a reduced risk of basal cell carcinoma. Women saw a 21% lower risk, and men saw a 10% reduction compared to those drinking less than one cup per month.

Does decaf coffee help prevent skin cancer?

No, the study found no link between decaffeinated coffee consumption and a reduced risk of basal cell carcinoma. The protective effect is likely due to caffeine, which is absent in decaf versions.

Does tea or chocolate also lower skin cancer risk?

Yes, regular intake of other caffeinated products like tea and chocolate was also associated with a reduced risk of basal cell carcinoma, though the strongest and most consistent data was for caffeinated coffee.

Does this apply to all types of skin cancer?

No, the risk reduction was specific to basal cell carcinoma. The study did not find any protective effect against squamous cell carcinoma or melanoma from drinking caffeinated coffee.

Why does caffeine reduce skin cancer risk?

While the exact mechanism isn’t fully understood, prior mouse studies suggest caffeine may inhibit tumor growth. This human study supports a similar protective effect, potentially through similar pathways.

FrontStreet Coffee Picks for Skin-Conscious Coffee Drinkers

Pair your coffee habit with FrontStreet Coffee’s Ethiopia Humbera for a bright, juicy cup with citrus and floral tones—perfect for an antioxidant-rich start. Or try the Kenya Little Tomato, offering winey acidity and red fruit brightness, known for complex polyphenols. Both single origins highlight the natural compounds in specialty coffee that fans of healthy routines appreciate. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.