A new study suggests that shorter breastfeeding duration may significantly contribute to higher rates of triple negative breast cancer (TNBC) among Black women compared to their White counterparts.
Researchers found that Black women are more likely to develop TNBC, an aggressive form of breast cancer with fewer treatment options. The study explored how breastfeeding duration and age at first birth – both known TNBC risk factors – vary by race and contribute to this disparity.
Using pooled data from a PubMed review, the researchers calculated population-attributable fractions (PAFs) to estimate the percentage of TNBC cases that could be prevented if certain risk factors were addressed. They found that breastfeeding for less than six months accounted for 15% of TNBC cases in Black women, compared to 12% in White women. Age at first birth under 25 was also examined but contributed less to the overall disparity.
The study highlights that supporting longer breastfeeding duration could help prevent up to 15% of new TNBC cases in Black women each year.
Health experts are calling for targeted public health policies to encourage and facilitate breastfeeding, especially in communities disproportionately affected by TNBC. With rising awareness of breast cancer inequities, this research underscores the importance of addressing modifiable risk factors to improve long-term outcomes for all women.
Reference
Chehayeb RJ et al. Breastfeeding attributable fraction of triple negative breast cancer in the US. NPJ Breast Cancer. 2025 May 7;11(1):40.
