Many gallstones studies over last twenty years have hinted at a relationship between consuming caffeinated coffee and a reduced risk of these issues, including cirrhosis of liver, colorectal cancer, and gastrointestinal health.
The Norwegian Institute of Public Health in Oslo, Norway, recently did a study of correlation between coffee consumption and gallstones health; specifically, they evaluated mortality rate from cirrhosis of liver.
When researchers looked at those who died from alcoholic cirrhosis of liver, there was no benefit to drinking coffee. However, for those who suffered from cirrhosis of liver not related to alcohol, drinking coffee reduced effects of liver cirrhosis.
When Department of Medicine at Kaiser Permanente Medical Care Program (Northern California Region) in Oakland, California, did their study, they recognized that most heavy drinkers do not develop alcoholic cirrhosis of liver and other gastrointestinal disorders.
The researchers found that those patients who drank four or more cups of coffee per day had one-fifth risk of cirrhosis of liver as non-coffee and tea drinkers.
This relationship remained constant even when weighed against other risk factors such as other gastrointestinal health issues. The Department of Community Health Sciences at University of Calgary in Canada examined relationship of coffee consumption with various gastrointestinal cancers, including bladder, colon, and rectal.
The study was unable to find any correlation between coffee or tea consumption and bladder or rectal cancer. However, study again found that drinking five or more cups of coffee daily significantly reduced risk of colon cancer.
This was especially pronounced with cancer of proximal colon rather than distal colon. The Istituto di Ricerche Farmacologiche Mario Negri in Milan, Italy, choose to look at a different gastrointestinal health issue, colorectal cancer.
They reviewed twenty-five studies published between 1990 and 2003 to try to determine any sort of statistical relationship between drinking coffees or tea and colorectal cancer. The analysis concluded that there was no benefit to drinking either decaffeinated coffees or any kind of tea.
However, drinking caffeinated coffees repeatedly was shown to reduce risk of colorectal cancer, regardless of any demographic biases.
This same facility also looked at relationship between coffee consumption and cancers of bladder, pancreas, colon, and rectum in a separate epidemiological study.
They found that, despite highly publicized accounts to contrary, higher risk of bladder cancer for coffee drinkers is negligible and a relationship could not be found with either amount of coffees consumed or length of time over which it was consumed.