An elemental diet consists of only pre-digested/elemental nutrients (ie. amino acids, simple carbohydrates, medium chain triglycerides), and essential vitamins and minerals.
It can be used asthe sole source of nutrition for a limited period of time in place of antimicrobials in the Eradication Phase to significantly decrease the bacterial overgrowth.
A clinical trial  demonstrated that a two-week, as well as a three-week, exclusive elemental diet was able to normalize the lactulose breath test (LBT) results in 80% and 85% of SIBOpositive patients, respectively.
It can also be used in Crohn’s disease patients whose ability to
digest and absorb is compromised.