Drinking coffee regularly may reduce the risk of liver and womb cancer, a new World Health Organisation (WHO) study reveals. The WHO's International Agency for Research on Cancer (IARC) has also reversed a 1991 decision that drinking coffee was linked to bladder cancer. The change of decision follows a new evaluation of more than 500 studies on the relationship between cancer and drinking different types of hot drinks such as tea, coffee and the popular South American herbal drink, maté. The IARC team found that coffee drinking had no carcinogenic effects for cancers of the pancreas, female breast and prostate. For more than 20 other cancers, the evidence was inadequate to enable a conclusion to be made.