More than 30% of breast cancers are considered preventable through healthy everyday choices — yet most women are not acting on the very risk factors they know about. That is the headline finding of a major new American Cancer Society report released October 1 to open Breast Cancer Awareness Month.
What the new ACS report found
The report, "From Awareness to Action: A New Look at Breast Cancer Risk Reduction," is based on a survey of roughly 33,000 U.S. women drawn from the ACS's Cancer Prevention Study-3, a 300,000-participant cohort enrolled between 2006 and 2013 that researchers are still following. It was led by Alpa V. Patel, PhD, the ACS's senior vice president of population science.
The core message: exercising regularly, maintaining a healthy weight, avoiding alcohol and tobacco, and breastfeeding can substantially lower breast cancer risk. "Doing something is better than doing nothing," Patel said of the lifestyle factors the survey examined.
The awareness-to-action gap
The survey's most striking numbers are the gaps between what women know and what they do:
- Exercise: 91% of women know that low physical activity raises cancer risk, but only 27% meet the ACS guideline of 150 to 300 minutes of moderate-intensity or 75 to 150 minutes of vigorous-intensity activity per week. Exercise is the widest awareness-to-action gap in the survey.
- Alcohol: 85% know alcohol raises breast cancer risk, yet 69% still drink. The ACS calls alcohol a known carcinogen; its guidance for women who drink is no more than one drink a day (12 oz of beer, 5 oz of wine, or 1.5 oz of 80-proof spirits).
- Breastfeeding: only 55% of women know that breastfeeding can help lower cancer risk, making it the least-known protective factor in the survey.
- Family history: 99% know a family history raises risk — but more than 85% of women diagnosed with breast cancer have no family history of the disease. Genes matter far less than lifestyle for most cases.
Why this matters now
About 1 in 8 U.S. women will develop breast cancer in their lifetime, and incidence is still rising — 1% per year overall and 1.4% per year in women under 50. The ACS estimates 321,910 new invasive cases and 42,140 deaths among women in the U.S. in 2026, plus 2,670 diagnoses and 530 deaths among men.
One caveat from the researchers: the survey's respondents are long-term cancer-research volunteers, so their risk-factor awareness is significantly higher than the general population's — the real public gaps are likely even wider.
The takeaway
Breast cancer is not only about genetics, and screening is not the only line of defense. Regular exercise, a healthy weight, less alcohol, and breastfeeding are the levers most women can pull — and according to the ACS, they could prevent more than 30% of cases.
Music in this post's reel: Kevin MacLeod - Our Story Begins (incompetech.com), licensed under CC BY 3.0
Sources: American Cancer Society press release | Essence | MedicalXpress | HealthDay via Drugs.com