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Blood work
Clinical Update 11/27/2024 B-12 Deficiency & GI Symptoms Vitamin B-12 deficiency can cause many symptoms, including chronic diarrhea, as described in a recent report
Sugar or fat
Nasal sprays may come in fixed concentrations (for example 50 mcg per spray) and may require adjusting number of sprays rather than volume
Cell 8 , 24212436 (1997)
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