drinking and breast cancer, wine bad or good

Women who want to avoid breast cancer should go easy on the alcohol, according to a new report. What’s the connection between drinking and breast cancer?

A Collaborative Review of Drinking and Breast Cancer:

The American Institute for Cancer Research and the World Cancer Research Fund collaborated on a systematic review of 119 studies. There were 12 million women included in the analysis.

The Findings:

One drink a day, equivalent to one beer or a small glass of wine, raised the risk of breast cancer by roughly 5 percent in pre-menopausal women and 9 percent in post-menopausal women. Though no one is sure exactly why there is a connection between drinking and breast cancer, the connection is consistent and troubling.

Exercise Lowers the Risk of Breast Cancer:

Exercise, on the other hand, lowered the risk for developing breast cancer. Pre-menopausal women who were very active reduced their risk of breast cancer by 17 percent. Post-menopausal women who exercised vigorously lowered their risk by 10 percent.

World Cancer Research Fund International/American Institute for Cancer Research. Continuous Update Project Report: Diet, Nutrition, Physical Activity and Breast Cancer. 2017. 

Previous Research Supports the Benefits of Exercise:

This is not the first time a study has shown that physical activity can help protect a woman from breast cancer. Back in 2012, a study of more than 3,000 women enrolled in the Long Island Breast Cancer Study found that regular physical activity reduced the risk of breast cancer by about 30% (McCullough et al, Cancer, Oct. 1, 2012).

Regular exercise, between 10 and 19 hours a week, during childbearing years reduced the risk of postmenopausal breast cancer by one third. But even women who didn’t start exercising until menopause were less likely to develop breast cancer than their sedentary peers. The message: it’s never too late to start moving.

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  1. Alice
    Bristol, Vermont

    There are clearly many factors involved in our risk of breast cancer (environment, diet, emotional makeup, toxins in the products we put on our skin, genetics, food, on and on…), and they don’t necessarily correlate with positive or negative factors for other health issues. As a breast cancer survivor, I try to do all I can to raise the odds of staying on the planet for another stretch of time.

  2. Tom

    What was the absolute risk?

    • Terry Graedon

      The study did not report it. The absolute risk for premenopausal women would be low, since it is only 5% higher than a low baseline absolute risk.

  3. Pepi
    Oregon, WI

    So what happened to the theory that one glass of wine a day help the heart?

  4. Pat

    Which goes to show that they do not know what causes cancer. I drank acohol less than a half dozen times in my entire life; I was physically active during my child bearing and rearing years (huge garden, milked a cow, big farmhouse and the kids, etc) and guess what? I got breast cancer.

    There must be many, many contributing factors or there is something that is being completely overlooked.

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