Extended Breastfeeding May Reduce Risk of Triple Negative Breast Cancer

Fri 16th May, 2025

Recent research suggests that longer breastfeeding duration may help mitigate the risk of developing triple negative breast cancer (TNBC), particularly among women in the United States. The findings indicate that both shorter breastfeeding periods and a younger age at first childbirth are associated with an increased likelihood of TNBC, a type of breast cancer that disproportionately affects Black women.

A study conducted by researchers at Yale University analyzed the impact of breastfeeding duration and age at first birth on TNBC disparities across different racial groups. The study employed statistical methods to derive population-attributable fractions (PAFs) for breastfeeding periods of less than six months and an age at first birth below 25 years.

The results revealed that the PAF associated with breastfeeding for under six months was approximately 12% for White women and 15% for Black women. This indicates a significant correlation between limited breastfeeding and the incidence of TNBC within these populations.

The authors of the study advocate for policy initiatives aimed at promoting and facilitating longer breastfeeding durations. They emphasize the need to address structural barriers that hinder breastfeeding, calling for a cultural shift that encourages and supports nursing mothers. Proposed measures include raising awareness of the health benefits of breastfeeding and enhancing workplace policies to accommodate breastfeeding mothers.

Furthermore, the study highlights the importance of curbing the influence of formula manufacturers in public policy discussions. By increasing support for breastfeeding initiatives, the researchers believe it is possible to improve overall public health outcomes, resulting in healthier infants and potentially lower rates of breast cancer.

These findings underscore the relevance of breastfeeding in promoting maternal and child health, as well as its potential role in reducing disparities in cancer incidence among different racial groups. Continued research and advocacy efforts are necessary to foster an environment where breastfeeding is not only accepted but actively supported.


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