The scientists say they don't know exactly how coffee lowers the risk but think that lower estrogen in coffee drinkers may be the mechanism.
http://www.webmd.com/cancer/news/201502 ... ancer-risk
"...The researchers also can't say for sure why coffee may lower the cancer risk. However, one possibility is that coffee reduces estrogen levels in the body, changing the balance of hormones, Merritt said."
http://www.webmd.com/cancer/news/201502 ... ancer-risk
"...The researchers also can't say for sure why coffee may lower the cancer risk. However, one possibility is that coffee reduces estrogen levels in the body, changing the balance of hormones, Merritt said."
