What is the effect of caffeine consumption on a women's risk for breast cancer?

Updated: Dec 26, 2019
  • Author: Graham A Colditz, MD, DrPH; Chief Editor: Chandandeep Nagi, MD  more...
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Considerable speculation that caffeine may be a risk factor for breast cancer followed a report that women with benign breast disease experienced relief from symptoms after eliminating caffeine from their diet. Most case-control studies, however, have not observed evidence of a positive association with breast cancer. In prospective studies, no increase in breast cancer risk has been seen. Similarly, no evidence for an association between tea consumption and risk of breast cancer has been seen in epidemiologic studies. [58] Thus, the epidemiologic evidence is not compatible with any substantial increase in breast cancer risk associated with drinking coffee or tea.

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