25 Recognized Risk Factors For Breast Cancer
When it comes to breast health, knowledge is power. Breast cancer doesn’t have a single cause—many different factors can raise or lower your risk. Some of these can’t be changed, but others are things you can take action on today.
Here are 25 recognized risk factors for breast cancer:
Unchangeable Risk Factors
Age (risk rises with age)
Female gender
Family history (mother, sister, daughter)
Inherited gene mutations (BRCA1, BRCA2, etc.)
Personal history of breast cancer
Race/ethnicity differences
Dense breast tissue
Past benign breast disease (like atypical hyperplasia)
Previous chest radiation (especially young)
Early start of periods (before 12)
Late menopause (after 55)
Having a first baby after 30
Never having children
Hormonal & Reproductive Factors
Hormone replacement therapy (HRT)
Birth control pills (slight, temporary increase)
Not breastfeeding or shorter breastfeeding time
Lifestyle & Environmental Factors
Drinking alcohol
Being overweight or obese (especially after menopause)
Lack of physical activity
Diet high in fat, low in fruits/vegetables
Smoking
Night-shift or rotating shift work
Environmental exposures (pollution, pesticides, chemicals)
Other Medical & Biological Factors
High bone density (linked to estrogen exposure)
History of ovarian or endometrial cancer
💡 What you can do:
While you can’t change your age, genes, or family history, you can take steps to lower risk: stay active, maintain a healthy weight, limit alcohol, avoid smoking, and get regular screenings.
At The Stonebrook Project, we’re here to help you stay informed and supported. If you’d like to learn more about your personal risk, breast density, or screening guidelines, reach out to us anytime.
Your Breast Friend,
Edie A. Tolbert
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