Coffee Off List of Carcinogens, WHO Study Reports

Coffee Off List of Carcinogens, WHO Study Reports
Coffee should no longer classified as a carcinogen to humans, according to World Health Organization (WHO) International Agency for Research on Cancer. The new assessment is summarized in a report titled “Carcinogenicity of drinking coffee, mate, and very hot beverages,” published in the journal The LANCET Oncology. In 1991, the working group classified coffee as "possibly carcinogenic" to humans. Now, the team revised the data used to form a potential association between coffee consumption and cancer. They determined the link was "based on limited evidence of an association with cancer of the urinary bladder from case-control studies, and inadequate evidence of carcinogenicity in experimental animals." The 23 scientists from the 10 countries that composed WHO’s working group analyzed more than 1,000 relevant observational and experimental studies. The team gave the greatest weight to well-conducted cohort and population-based case-control studies that controlled for important potential confounders, including tobacco and alcohol consumption. Analyzing 10 cohort studies and several population-based studies researchers concluded there is "no consistent evidence" linking coffee drinking and bladder cancer. "The working group concluded that positive associations reported in some studies could have been due to inadequate control for tobacco smoking, which can be strongly associated with heavy coffee drinking," wrote study author Dana Loomis, Ph.D., deputy head of the section of IARC m
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