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Breast Cancer Myths vs. Facts

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Myth: Most breast cancers run in families.

Fact: Only about 5% to 10% of breast cancers are thought to be hereditary, which means they are caused by abnormal genes passed from parent to child. Lifestyle and environmental factors can have an impact on breast cancer risk.

Myth: There is nothing you can do to lower your risk of developing breast cancer.

Fact:Lifestyle and environmental factors can have an impact on breast cancer risk. To keep your risk as low as it can be, maintain a healthy weight, exercise regularly, and limit the amount of alcohol you drink.

Myth: Bras cause breast cancer.

Fact: Underwire bras do not cause breast cancer. A 2014 scientific study looked at the link between wearing a bra and breast cancer. There was no real difference in risk between women who wore a bra and women who didn't wear a bra.

Myth: Regular mammograms prevent breast cancer.

Fact: Mammograms don’t prevent breast cancer, but they can save lives by finding breast cancer as early as possible, when it’s most treatable.

Myth: Antiperspirants cause breast cancer.

Fact: There is no scientific evidence to support the claim that antiperspirants cause breast cancer, either because of toxin buildup or aluminum exposure.

Up next: 6 Breast Cancer Risk Factors You CAN Control

Learn more about breast cancer myths and facts by watching our PSA.


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