Study Reveals Link Between Hot Beverage Consumption and Esophageal Cancer Risk

A recent study published in the International Journal of Cancer has explored the connection between hot beverage consumption and the risk of developing esophageal cancer among nearly one million adults in the UK. The study combined data from the Million Women Study and the United Kingdom Biobank, totaling 977,282 participants, to assess how preferred drink temperature and consumption frequency are related to esophageal cancer risk.

The research specifically looked at two subtypes of esophageal cancer: squamous cell carcinoma (SCC) and adenocarcinoma (AC). It was found that those who consumed their tea or coffee at a 'very hot' temperature faced a risk of developing SCC that was more than three times higher than those who preferred their drinks 'warm'. Interestingly, there was no significant association between drink temperature and the risk of esophageal adenocarcinoma.

Further analysis showed that drinking six or more hot beverages daily was linked to a 71% increase in SCC risk compared to consuming fewer than six, although this increased consumption did not significantly affect AC risk. These findings remained consistent even among never-smokers and light drinkers, indicating that factors like smoking and alcohol consumption did not confound the study’s results.

The study also considered whether the addition of milk could affect these findings, analyzing a subset of participants from the Million Women Study with available data on milk use. It was concluded that adding milk did not significantly alter the temperature-related association with cancer risk.

Public health modeling within the study suggested that if there is a causal relationship, reducing drink temperature from 'very hot' to 'hot' could prevent about 440 cases of esophageal SCC annually in the UK. The authors of the study note that while the temperature was self-reported and not precisely measured, the results provide a basis for recommending a reduction in drink temperature as a potentially effective strategy for SCC prevention.

Although the study provides substantial evidence for the correlation between hot drink consumption and SCC risk, the observational nature of the research means causation cannot be proven. The study highlights the need for further research to understand the mechanisms behind these findings and consider drink temperature as a modifiable risk factor in future esophageal cancer prevention strategies.