Certainly, aiding in post-pregnancy weight loss makes breast-feeding good for your health, but it goes further than that.
A study published in the journal New Beginnings in 2009 studied 140,000 women who had breastfed for at least a month following pregnancy. It found that breast-feeding for a month or more reduced the occurrence of high cholesterol, high blood pressure and diabetes. Breast-feeding for at least a year also reduced the risk of heart attack and stroke.
Next: Have they told you it gets easier with each birth?