Does Too Much Coffee or Tea Cause Cancer?

Coffee and tea are two of the most popular beverages in the world. But is the common daily habit slowly causing more harm than you want? A new study analyzed more than 2 million people and found no association between coffee and tea consumption and gliomas, a deadly type of brain cancer.

The researchers analyzed data from 9 cohort studies—think of it as gathering a giant jigsaw puzzle from various long-term research projects. They compared the highest versus lowest consumption groups of coffee and tea to see if there was a measurable difference in glioma risk. If you love coffee, you can feel good that you’re not harming your body. And if you’re a tea drinker, the news was even more positive.  
The data analysis suggests that people who drink more than 2.5 cups of tea per day have a lower risk of brain cancer.

This follows another recent study that found tea and coffee consumption was also linked to a lower risk of head and neck cancer. However, for those cancers, drinking several cups per day appeared to increase protection. 

Compared with non-coffee drinkers, individuals who drank more than four cups of caffeinated coffee daily were 17 percent less likely to have head and neck cancer overall, 30 percent less likely to have oral cancer, 22 percent less likely to have throat cancer, and 41 percent less likely to have throat cancer.

The studies hint that bioactive compounds and antioxidants in these beverages may contribute to positive health outcomes, though the exact mechanisms remain a subject of ongoing research.

Schwarzenneger, A. (2025, February 19). Does Too Much Coffee or Tea Cause Cancer?. Arnold's Pump Club. Retrieved February 19, 2025, from https://arnoldspumpclub.com/?srsltid=AfmBOopxLdmS9Y0kPEzI8HqH9oVGAHzH9W1zWQ21UbDvp-LgS1qO