I have been making some very strange observations under the 'scope' lately. I have discovered that there are more things in our bowels than can be imagined!
Most of us have a normal population of parasitic protozoa in us. It is these guys who can cause trouble once the numbers get high enough.
They produce toxins, which in turn cause increase in certain bacteria. It is this bacteria {in my opinion} that causes the "white tongue" thing.
There is also a presents of yeast which can be good or bad.
The bacteria is something I am attempting to address by natural anti-biotic.
I am doing this by eating regular amounts of Roquefort cheese from lambs milk--high quality.
So far this has had immediate effects. I am also on an experimental drug which has increases the immune-response substantially and is destroying protozoa enmass.

I just wanted to make the point that there is usually more going on than most know, when it comes to these types of intestinal imbalances. Shroom