Why are there different prep instructions before having a sibo small intestinal bacterial overgrowth test? can i have ensure shakes a few days before

Prep instructions.: You have heard the saying "there are different ways to skin a cat." Different doctors have found different preps that have worked for them or that they have learned in their truing programs. I would says if it says you can have Ensure then yes. Otherwise unless you call and receive permission then no. Sometimes the littlest changes in preparation can ruin the test.