Breast feeding has been found to reduce the risk of breast cancer; especially the most aggressive subtype. In a study whose report was published in the Annals of Oncology, it was found that the risk of this form of breast cancer was reduced by almost 20 percent in women who breast fed.
This type of breast cancer called Hormone-Receptor-Negative type is very aggressive and found among the negroid race and in women under 50 years. This type is in most cases diagnosed late and does not respond to current available drugs because the absence of receptors for female hormones makes it impossible for drug to target the cancer cells.
The study was carried out by Icahn School of Medicine at Mount Sinai, Washington University, St. Louis and the American Cancer Society