Can we use vitamins if there is a certified deficiency?

I recommend that my patients get their vitamins and minerals from food. Most of the mild deficiencies found in lab work are generally due to malabsorption, and the inulin or rifaximin both result in repair of the intestinal tract and normalization of absorption. Exceptions would be supplementation for significant B12, iron deficiencies, or kids with folate-receptor antibody issues.