For updated information see Microbiome Prescription
Was reported high in Ian Lipkin study (see this post).
- “This genus [Pseudoflavonifractor] is one of the most prominent butyrate producers, providing energy to the colonic mucosa and known to regulate gene expression, inflammation, differentiation, and apoptosis in host cells (Luo et al., 2013).”
There are 10+ studies on PubMed.
- “We also performed species classifications and found Holdemania filiformis and Pseudoflavonifractor capillosus to be increased and decreased in the PPI cohort, respectively.” 
- Phosphorus in diet increases 
- Phosphorus containing food
- Proton pump inhibitor