Coffee consumption and bladder, kidney and prostate cancers

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This is the fourth of six blog posts on the topic of coffee consumption and cancer research, concentrating on the impact of coffee consumption and cancers of the bladder, kidney and prostate. Coffee and Health also houses current scientific information on a wide range of other coffee-related topics.

Following is an overview of research conducted in this area.

Inconclusive evidence for a link between coffee and bladder cancer

Some recent studies and a meta-analysis report up to 18% higher risk of bladder cancer in coffee drinkers, no association in women and an increased risk of 26% in men.  However, these studies have a critical confounding factor – the type of water used to prepare the coffee as chlorinated water is thought to increase the risk of bladder cancer.

Links between coffee consumption and bladder cancer may also be confounded by smoking which is usually linked with coffee and alcohol consumption, or to an association between alcohol, coffee and a yet unidentified risk factor.

However, another meta-analysis looking at coffee drinking and bladder cancer finds that men who drink coffee are less likely to develop bladder cancer than men who do not.

No link between coffee and kidney cancer

Studies clearly and consistently fail to find any link between coffee consumption and kidney cancer.

Coffee drinking not linked to increased risk of prostate cancer

A large meta-analysis of studies finds no influence of coffee consumption on the risk of developing prostate cancer.

A further large meta-analysis covering Europe, North America and Asia reports that coffee drinkers have a 21% lower risk of developing prostate cancer than non-coffee drinkers.

Another studyof men finds that men who drink six or more cups of coffee a day have a 60% lower risk of lethal and advanced prostate cancer than non-drinkers.

For more information on coffee and cancer research click here, and to view information sources, click here.


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