Hello again Biophiliac,
If your coated tongue is due to a parasitical infection such as candida-albicans (a fungus), then water-only fasting will eliminate the "terrain" which has caused this overgrowth.
Toxemia will provide this inner "environmental terrain" for any fungus or parasitical infestation to thrive, so eliminating this bodily environment will rid your body of the candida and therefore the coated tongue.
Candida plays havoc with the digestive process and your coated tongue can therefore be most likely a symptom of this disruption.
"Man lives in such a manner that he breaks down his resistance to parasitic invasion. Parasites cannot harm the man or woman who has maintained, unimpaired, the integrity of his or her body."..............
Herbert M. Shelton DP ND DC DNT DNSc DNPh DNLitt PhD DOrthop
"Parasites or fungal infections can be starved out and they will not again infest an intestinal tract that is kept sanitary by right food and living.".........
George Weger MD.
The one thing that will sanitize your digestive tract above all else is water-only-fasting.
"It is impossible for parasites to develop in the intestines of a child or adult unless the digestive secretions are weakened to such an extent that they have no destructive influence on the ova, or eggs, of the parasites taken in with the food"...........
J H Tilden MD.