Reacción a "High coffee consumption associated with lower risk of head and neck cancer, study finds"

This review reports the association between coffee (ordinary and decaffeinated) and tea drinking with risk of head and neck cancers. The overall conclusion is that the consumption of these beverages is associated with a slightly lower risk of cancer at these sites.

An important limitation is that this review is based on observational studies and not randomized controlled trials. So we cannot say from this study that drinking these beverages will lower risk of these cancers. In observational studies, it is very difficult to totally eliminate confounding effects, for example, of tobacco and alcohol from the statistical analyses. Consequently, people who drink a lot of coffee and tea may be more likely to avoid other harmful behaviours such as drinking alcohol and using tobacco and so may be at a lower risk of these cancers for other reasons.

In conclusion, the findings may be reassuring for coffee and ordinary tea drinkers because some previous studies have suggested that drinking certain hot beverages, particularly the South American herbal tea maté, is associated with a slightly increased risk of oral and throat cancer.