I have found that after extended juice fasting ie 12-15 days, it (White tongue) clears up, I feel my best yet, an dit doesnt re-appear untill I wind up eating foods that push the composting button in the body. AKA Animal products/coocked grains or worse combinations of both.
Continued consumption of only fruit/fruit juices, and salds keeps me in great shape. Tonue only. No more candida. (assuming my bowel is moving dails, and I am parasite and stone free)