1. low HCl in stomach
   1. >30 y.o.
   2. poor protein digestion
      1. B12
2. Etiology
   1. caffeine
   2. sugar
   3. refined foods
   4. alcohol
   5. chronic overeating
   6. drugs
   7. emotional stress
   8. diet changes
      1. meat <-> vegetarian
3. Signs and Sxs
   1. Food sits and doesn't digest
   2. protein sensitive
   3. diarrhea/constipation
   4. bloating/gas/fullness
      1. <eating
   5. heartburn
   6. joint and muscle aches
4. Labs
   1. measure pH
      1. Heidelberg or string test
   2. Chem Screen
      1. high
      2. N
      3. Cl
   3. Hair analysis
      1. low in minerals
         1. thin nails, nervousness, insomnia