One common explanation is reduced brush border membrane enzymes due to intestinal inflammation or mucosal and villous atrophy. In the Gut Zoomer, correlate with Inflammation panel markers.
However, there are several other conditions and mechanisms that should be considered in the differential diagnosis.
See sites, conditions, and mechanisms of malabsorption below.
Reference
Noland, J. D., Johnston, I. M., & Walters, J. RF. (2015). Physiology of malabsorption. Surgery, 33(5), 193-199. https://doi.org/10.1016/j.mpsur.2015.02.003
