Most U.S. women are well aware of lifestyle factors that can lower breast cancer risk, but far fewer are actually acting on that knowledge. A major American Cancer Society survey of 33,000 women found that while 91% know physical inactivity raises risk, only 27% meet recommended activity levels. And though 85% know alcohol increases risk, 69% still drink.
Awareness alone isn't cutting it when it comes to breast cancer prevention. A new American Cancer Society survey of 33,000 women enrolled in the long-term Cancer Prevention Study-3 found a striking disconnect between what women know about modifiable breast cancer risk factors and what they actually do about them.
The numbers tell a clear story: 91% of women know that low physical activity raises cancer risk, yet only 27% meet the ACS-recommended weekly exercise targets. Similarly, 85% know alcohol increases breast cancer risk — but 69% still drink to some extent. Awareness was lowest for breastfeeding, with just 55% knowing it can help reduce risk. Experts say clinicians are key to closing this gap, especially through simple, non-judgmental messaging that encourages small, achievable changes rather than perfection.
By the Numbers:
Why it matters: With 1 in 8 U.S. women expected to develop breast cancer in their lifetime, the gap between awareness and action represents a major missed opportunity for prevention. Targeted clinical conversations and accessible risk tools could meaningfully shift behavior — and outcomes.
