White tongue and immunity problems are a very strong sign that your friendly bacteria are unbalanced. Why friendly bacteria,they keep candida in check, they assist in digestion and absorption, and they are responsible for 70% of your immunity.
-Diet 70% raw produce
-Compare symptoms to deficiencies and supplement them
---New Science Shows Infants Are Born With Gut Bacteria, How Do You Make It Healthy? BY J. E. Williams, May 4, 2012, Renegade Health
---The Gastrointestinal Immune System, by R. Bowin, Index of: Fundamental Physiology and Anatomy of the Digestive System, Colorado State
University, March 19, 2004
---How to Boost Your Immune System with Probiotics, By Ethical Nutrients