08.30.132:05 PM ET

Alcohol Linked to Breast Cancer

Daily drinking leads to increased risk, study says.

Sorry to kill your buzz from any early Labor Day parties. Young women who drink daily increase their lifetime risk of developing breast cancer by 13 percent, according to a study in the Journal of the National Cancer Institute. In the study, researchers surveyed more than 90,000 mothers from 1989 to 2009. Teens and college students who drink every day aren’t thinking about future risks, says study author Graham Colditz, associate director for cancer prevention at Siteman Cancer Center at Barnes-Jewish Hospital and Washington University School of Medicine. The study also found that the lengthening of time between a girl’s first period and pregnancy is a factor as well, which may have to be monitored as more women delay childbirth.