how could microbiome changes not have measurable impact on the body? bodies are ridiculously complex systems. and there are plenty of instancess where gut micr

how could microbiome changes not have measurable impact on the body? bodies are ridiculously complex systems. and there are plenty of instancess where gut microbiome changes are known to be impactful. my partner got SIBO which caused lots of problems for a few months and she was basically unable to eat anything.