Comparison of Preventive and Therapeutic Zinc Supplementation in Young Children in Burkina Faso: A Cluster-Randomized, Community-Based Trial.

The preventive and TZS groups had reduced diarrhea incidence, but it is uncertain whether this resulted from a functional response to zinc or reporting bias. The comparison should be re-examined in populations known to respond to zinc supplementation. This trial was registered at www.clinicaltrials.gov as NCT00944359.