Is it true that breastfeeding helps loose weight which one has gained during pregnancy?

It is true that breastfeeding burns about 300 to 500 calories per day, but remember the golden rule - calories consumed > calories expended = weight gain. You still have to put in effort and be mindful of what you eat. That doesn't mean you should go on a diet. Just choose healthy alternatives. http://www.womenshealthmag.com/mom/breastfeeding-burns-calories