Definitely. However, this has been used to market a myriad of so-called health products that are far from ideal. I follow a carnivore diet and have always been

Definitely. However, this has been used to market a myriad of so-called health products that are far from ideal. I follow a carnivore diet and have always been a bit scared of messing up my microbiome, while finding it quite strange that I defecate non-negligible amounts of waste, once a day on average. Only recently has my knowledge gap been filled when I found out that our microbiome can survive solely on amino acids. In fact, all this "gut-brain axis" stuff regarding the production and/or catabolism of neurotransmitters by gut bacteria only makes sense if bacteria can ferment amino acids. Thinking that some bacteria strain can produce neurotransmitters from fibre is an insult to intelligence: where does the nitrogen come from?