Drinking Caffeinated Coffee May Lower Basal Cell Carcinoma Risk

If you've spent years in the sun—or just want to lower your odds of the most common form of skin cancer—here’s a simple habit that might help: drinking coffee. A large-scale study led by researchers at Harvard Medical School offers compelling evidence that regular consumption of caffeinated coffee is linked to a reduced risk of basal cell carcinoma, the most frequently diagnosed skin cancer worldwide.

The short answer? Yes—drinking three or more cups of caffeinated coffee per day may lower your risk of developing basal cell carcinoma. Women who drank that much saw a 21% reduction in risk, while men had a 10% lower risk compared to those who drank less than one cup per month.

What Is Basal Cell Carcinoma?

Basal cell carcinoma (BCC) is the most common type of skin cancer. It typically appears on sun-exposed areas like the face, neck, and ears. Unlike some other cancers, BCC grows slowly and rarely spreads to other parts of the body, but it can still cause significant local damage if left untreated. In the U.S. alone, around one million people receive treatment for BCC each year, making it the most prevalent form of skin cancer. Globally, it accounts for over half of all diagnosed skin cancers.

The Harvard Study: What Was Found?

Researchers from Harvard Medical School analyzed health data from more than 112,000 participants across two major longitudinal studies: the Health Professionals Follow-Up Study and the Nurses’ Health Study. These individuals were tracked for over 20 years, providing a rich dataset on lifestyle factors and disease outcomes.

The findings showed that:

• Women who consumed three or more cups of caffeinated coffee daily had a 21% lower risk of developing basal cell carcinoma compared to those who drank less than one cup per month.
• Men who drank the same amount saw a 10% reduction in risk.

Importantly, these risk reductions were only observed with caffeinated coffee. Decaffeinated coffee showed no protective effect against BCC. Similarly, while caffeinated tea and chocolate also appeared to offer some benefit, their impact was not as clearly defined in the study.

Why Caffeine—and Not Other Coffee Compounds?

The researchers pointed to previous animal studies in which caffeine demonstrated the ability to inhibit tumor growth. While the exact mechanism in humans isn’t fully understood, the correlation observed in this large human study suggests that caffeine may play a similar role in limiting the development or spread of basal cell carcinoma cells.

It's worth noting that the study found no risk reduction for other types of skin cancer, including squamous cell carcinoma or melanoma, the deadliest form of skin cancer. This specificity strengthens the idea that caffeine’s protective effect, if confirmed, may be particularly relevant to BCC.

Coffee Types That Matter

The study focused solely on caffeinated coffee. Other caffeinated products such as tea and chocolate were also loosely associated with lower BCC risk, but the data were less definitive. Importantly, decaffeinated coffee showed no significant association with reduced risk of basal cell carcinoma. That means if you're drinking coffee purely for this potential benefit, choosing a regular, caffeinated brew matters.

While the study didn't delve into brewing methods, roast levels, or bean origins, it reinforces the value of caffeine as the active compound under investigation.

Frequently Asked Questions

Does decaf coffee reduce the risk of basal cell carcinoma?

No, the study found no association between decaffeinated coffee consumption and a reduced risk of basal cell carcinoma. The protective effect was only seen in caffeinated coffee.

How many cups of coffee per day are needed for the benefit?

Women who drank three or more cups of caffeinated coffee per day had a 21% lower risk, and men had a 10% lower risk, compared to those who drank less than one cup per month. Less frequent consumption did not show the same benefit.

Does caffeine from sources other than coffee help prevent BCC?

Caffeinated tea and chocolate were also loosely linked to a lower risk of basal cell carcinoma, but the evidence was not as strong or consistent as it was for caffeinated coffee. The main protective effect was observed with coffee.

Does this study suggest coffee prevents all types of skin cancer?

No. The reduced risk was specific to basal cell carcinoma. The study found no significant impact on the risk of squamous cell carcinoma or melanoma, the other major types of skin cancer.

Is the caffeine or something else in coffee responsible for the effect?

Researchers believe caffeine is the likely active compound, as the benefit was only linked to caffeinated beverages. Previous studies in mice have shown caffeine can inhibit tumor growth, hinting at a possible similar mechanism in humans.

Recommended FrontStreet Coffee for Skin-Conscious Coffee Drinkers

For coffee lovers mindful of health and flavour, try FrontStreet Coffee’s Ethiopia Huakui — a bright, juicy Ethiopian single origin with notes of bergamot and stone fruit that pairs well with a healthy lifestyle. Alternatively, the washed Yirgacheffe offers floral and citrus tones, perfect for light, low-acid enjoyment. Both are easy-drinking, caffeinated options without heavy roast flavours. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.