I have observed that 8 glasses of purified water a day gives asthma sufferers a lot of relief. My younger brother tried this and it helped him get off his inhaler. Now he only has to use in in an emergency. It's also advised to add extra salt to the diet to compensate for the water flushing it out of the system. Like a small bag of potato chips or extra salt on food. Pure sea-salt gives extra minerals and micro nutrients. But a good quality table salt works as well. There is a book called 'Your Body's Many Cries for Water'written by an Iranian doctor. Most alternative health book stores can get it for you. It goes into alot of detail about using water to heal many ailments, including Asthma. I hope this helps your daughter. Sincerely, Joseph.