I've had a white tongue for most of my life. Along with 100 other symptoms that no doctor could figure out the orgin of. I just realised most, if not all of my symptoms are from candida. I spent years scrubbing my tongue with salt, but now I have a new solution. If you break a capsule of undecylenic acid in your mouth the white completely disappears. It only took a day for me to have the pinkest tongue after I tried this. Of course, the cause of your white tongue would need to be candida for this to actually work.