They studied about 1,500 children from birth to ages eight to 14. The study found that the longer the children were breastfed, the better they performed on tests measuring lung function.
Children whose moms had asthma and were breastfed for four months or longer also performed better in tests measuring lung capacity, suggesting breastfeeding could lower the risk of asthma.
The study was published in the American Journal of Respiratory and Critical Care Medicine.
