And re: microbes www.sciencenews.org/article/prob...
Also: we DO NOT KNOW the makeup of a perfect Platonic ideal microbiome. It's probably going to vary person to person and by environment!
Some probiotics could feed, rather than fend off, infections
Probiotics containing Lactobacillus gasseri Lg-36 prevented C. difficile infections in mice, but L. acidophilus probiotics made infection more likely.