Its extra salty water that is sterile. Hypertonic Saline works in that it clears thick mucus from your lungs, and acts as a barrier to prevent infection. Apparently it increases lung function, you have less infections, and have a general clearer feeling in your chest.
Here's a link: <a target=_blank class=ftalternatingbarlinklarge href="http://www.cysticfibrosis.ca/pdf/HypertonicSalineQ&A.pdf
">http://www.cysticfibrosis.ca/p...pertonicSalineQ&A.pdf
</a>
Hope this helps!
