Could a simple amino acid ease a devastating lung condition?

This study tested whether giving methionine (an amino acid) by mouth or feeding tube is safe and tolerable for children with a severe, inherited lung disease called pulmonary alveolar proteinosis. The disease is caused by a faulty MARS gene that prevents cells from using methionine properly. Only 3 children took part, and the goal was to see if the supplement could improve breathing and reduce the need for lung washes.