According to an article recently published in the International Journal of Cancer, increased intake of coffee and tea appears to decrease the risk of developing renal cell carcinoma.
The kidneys are each filled with tiny tubules that clean and filter the blood-the process that removes waste and makes urine. Renal cell cancer (RCC) is a malignancy involving these tubules of the kidney and is the most common type of kidney cancer.
An important focus of research in prevention of cancer and other diseases is diet. Several studies have indicated that diets high in fruit and vegetables may provide certain health benefits compared with diets higher in meats and processed foods. Researchers continue to evaluate this issue, as disease prevention remains a significant goal.
Researchers from several institutions around the world were involved in a clinical study to evaluate associations between coffee, tea, milk, soda, and fruit and vegetable juice intake and risks of developing RCC. This study included results from 13 studies including 530,469 women and 244,483 men. Follow-up was between seven and 20 years. Information about diet was gathered at the beginning of the trial.
- Individuals who drank three or more 8-ounce cups of coffee per day had a reduced risk of developing RCC compared with those who drank less than one 8-ounce cup per day.
- Individuals who drank one or more 8-ounce cups of tea per day had a reduced risk of developing RCC compared with those who did not drink tea.
- There were no associations between milk, soda, or juice intake.
The researchers concluded that “greater consumption of coffee and tea may be associated with a lower risk of renal cell cancer.” These results add to existing evidence suggesting that intake of coffee and tea does not appear to contribute to the risk of developing cancers.
Reference: Lee J, Hunter D, Spiegelman D, et al. Intakes of coffee, tea, milk, soda and juice and renal cell cancer in a pooled analysis of 13 prospective studies. International Journal of Cancer [early online publication]. June 21, 2007. DOI: 10.1002/ijc.22909.
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