A new study shows breastfeeding helps protect women against breast cancer.
Breast cancer is one of the top 10 killers of American women.
The study shows women who had a mother, sister, or other close relatives with breast cancer had a 59 percent lower risk of developing the disease if they breastfed.
That's about the same risk reduction as if a woman took the potent hormone therapy drug Tamoxifen to prevent breast cancer.
If a woman can't nurse her baby, the study shows that taking medication to suppress production of breast milk can lower her breast cancer risk by 42 percent.