A valid point. Hippocrates said to look to the gut for the cause of disease. (He would be denied a Medical Degree in today’s environment.)
Many people see trees, not the forest.
To be fair, the modern use of the scientific method promotes that approach: isolating a variable, rather than looking at the whole.
The S.M. is a tool, not a god. It has limitations. I garnered my share of science awards in my academic days. I respect it; I do not worship it. (Or, to paraphrase Spock: It makes a good servant, but a bad master.)
Leaky Gut Syndrome, in my opinion, is central to all sorts of systemic conditions, including auto-immune.
Therefore, healing the gut, through fasting, and non-/anti-inflammatory diet, is key to reversing many chronic conditions.
Spot on.
Furthermore, soil bacteria is being wiped out by agriculture. The symptoms have been prevalent for decades: Declining nutrients in fruits & vegetables. This is likewise not addressed by the researcher (PQQ).