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Fast overnight. 30 minutes 0.02 glycocholic acid breath test intestinal bacterial overgrowth 13 No antibiotics or cytoprotectives for 30 days. Certain medication interferes with the test (we will check). Fast overnight. 8 hrs 0.02 Schilling test Vitamin B12 deficiency 32 fast from midnight 24 hour urine collection 0.1 SeHCAT bile salt malabsorption 40 125 Fast overnight. Check medications. 3 ... ................
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