“…2 The patient in this case showed characteristics of gastrointestinal beriberi including nausea, vomiting, and abdominal pain, the elevated lactate levels and anion gap, the rapid resolution of symptoms after thiamine administration, and the low blood thiamine levels. 8,9 Additional findings not described as gastrointestinal syndrome but present in this case include leukocytosis, elevated transaminases, and tachycardia. Perhaps these findings will be confirmed in future cases of thiamine deficiency with gastrointestinal symptoms.…”