Correct. Firmicutes + Bacteroidetes comprise 90% of microbiome. There’s not a cut and dry percentage of each but 2.1:1 ratio is claimed to be optimal. Mine is little low possibly due to lifestyle choices (high protein, low carbs, low fat). Moreover, I clearly have a history with finesteride and antibiotics. I’ve been on high dose Xifaxan/Rifaximin in 2019 and 2020 and this may have also caused a shift. Antibacterial herbs/spices may also contribute. I clearly have both overgrowths and undergrowths, an example would be faecalibacterium prausnitzii, which defined as butyrate producer. My extremely high serum B12 also indicates that I have an overgrowth of B12 producing bacteria. Another example would be my chronically low E2, which may indicate low in bacteria needed to balance E2 level. I need to boost bacteria that reduces inflammatory cytokines and boost anti-inflammatory ones.
This is continuing to prove to be a super difficult task with limited science and literature available at hand and with the plethora of pseudoscience all over the interweb!