Enjoying a daily cup of tea or coffee might offer benefits beyond relaxation. New research indicates that individuals who frequently consume these beverages could experience a decreased likelihood of developing head and neck cancers.
Insights from the Study
Published in the journal Cancer, the analysis combined results from more than 14 observational studies conducted in Europe, North America, and Latin America. These investigations recorded participants’ consumption of tea and coffee, including nine studies that specifically focused on decaffeinated coffee.
The comprehensive dataset comprised 9,548 cancer patients diagnosed with head and neck cancers and 15,783 control participants without such conditions. Adjusting for factors like age, sex, smoking, alcohol intake, and fruit and vegetable consumption, the researchers uncovered significant associations:
- Consuming more than four cups of caffeinated coffee daily correlated with a 17% reduced risk of head and neck cancers.
- The protective effect was especially significant for cancers affecting the oral cavity and oropharyngeal region (the throat area just behind the mouth).
Findings Regarding Decaffeinated Coffee and Tea
The study highlighted different outcomes for decaffeinated coffee and tea:
- Decaffeinated coffee appeared to lower the risk of oral cavity cancer, though benefits for other cancer types were not evident.
- Tea intake of up to one cup per day was linked to a 9% reduction in overall head and neck cancer risk, including specific decreases in lower throat cancers. However, consuming more than one cup daily was associated with a 38% increase in the risk for laryngeal cancer, potentially due to tea’s role in triggering gastroesophageal reflux disease, a known risk factor for that cancer.
Bioactive Components Behind the Effects
Dr. Yuan-Chin Amy Lee, lead author and researcher at the Huntsman Cancer Institute and the University of Utah School of Medicine, proposed that substances beyond caffeine might be responsible for these cancer-protective effects. She said, “Perhaps bioactive compounds other than caffeine contribute to the potential anti-cancer effect of coffee and tea.”
These compounds—including polyphenols, flavonoids, and antioxidants—are known for their anti-inflammatory and cell-protective properties, potentially explaining the reduced cancer risks.
Considerations and Expert Opinions
Despite promising results, the study has limitations. Self-reported beverage intake can introduce inaccuracies, and the research did not differentiate between various types of tea (such as black, green, or herbal) or coffee brewing techniques. Lifestyle and other confounding variables might also have influenced the outcomes.
Professor emeritus Tom Sanders from King’s College London noted, “In observational studies, it is very difficult to totally eliminate confounding effects, for example, of tobacco and alcohol from the statistical analysis.”
Below is a recap of the study’s findings regarding coffee and tea consumption and cancer risk:
Could Your Daily Coffee or Tea Serve as a Shield?
While this research enhances our understanding of how everyday drinks may influence cancer risk, experts emphasize the need for caution. Relying solely on tea or coffee as a defense is not advisable. A healthy lifestyle—including balanced nutrition, regular exercise, and avoiding tobacco and excessive alcohol—remains essential.
Whether you start your day with a rich cup of coffee or wind down with tea, your choice of beverage could provide more than comfort—it might offer some protective health perks.
The full study is available in the journal Cancer.
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