This formula's own materials cite three specific, real external sources — worth checking each one directly rather than assuming what they cover.
A Harvard T.H. Chan School page on fiber and fermentation, a PubMed search page for Akkermansia muciniphila and metabolic research, and a PMC article specifically on chicory root inulin.
Linking to an actual institution and indexed research databases, rather than vague "studies show" language, is worth crediting as a transparency signal — while still reading each source as general category research, not a trial of this specific finished capsule.