Breastfeeding Linked to 11% Lower Maternal Heart Disease Risk in Brazil

The Brazilian Society of Cardiology (SBC) reports that women who breastfeed have about an 11% lower chance of developing cardiovascular disease compared with those who do not. Longer lactation periods—around 18 months—are associated with a 12% reduction in stroke risk and a 14% reduction in heart‑attack risk. The protective effect is linked to a metabolic “reset” during lactation, including improved insulin sensitivity, lower blood pressure, reduced diabetes risk and the release of hormones such as oxytocin, prolactin, glucocorticoids, ghrelin and growth hormone, which together support heart health. Alexandra Oliveira de Mesquita, vice‑president of the SBC Women’s Cardiology Department, emphasizes that not breastfeeding does not automatically increase risk, but extended breastfeeding offers measurable cardioprotective benefits. The findings are highlighted during International Breastfeeding Day and the August Golden campaign promoting lactation worldwide.