Biotene also has some active enzymes in it that are now missing from your mouth because of the xerostomia. The release of them from the gum, toothpaste (PBF version ), and mouth rise will help balance the flora in your mouth which will help with periodontal problems etc. So there is something more to using it. Just for the record - since Biotene was bought by GSK a couple of years ago, (used to be owned by Laclede) they are not donors to OCF. This advice is not motivated by anything other than it seems to work for me.