The tongue is particularly helpful in disclosing general physical involvements. A purplish colored tongue shows a deficiency of B2. A smooth shiny tongue, DiaberineB12 and Folic Acid can be blamed. When brilliant red it is often Niacinamide, and when enlarged and beefy it is pantothenic acid. Coated tongue is present in many illness and follows often after the use of antibiotics or prolonged use of strong mouth washes. Burning tongue is at times a need for B-6 and geographic tongue is usually iron and B-complex deficiency.VST (Vincents Stomatitis) more commonly referred to as "trehch mouth" may indicate a niacinamide deficiency. Frequent sore spots under dentures often result from too low a protein intake, plus calcium and magnesium deficiencies. Also, when too little digestive acid is present in the stomach its absence accounts for poor protein and calcium assimilation even when these are adequate in the diet.

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