In this videocast of The Health Edge Mark and John review some research linking higher intake of microbiota associated carbs (MAC) with biome diversity and health outcomes.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7143995/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4896489/
https://www.youtube.com/watch?v=Ybsp5ct_x2E&t=231s&ab_channel=TheHealthEdge