Hi tearjerker,
To say that you have "cured" your POIS after 3 days of a new diet is not really appropriate. Like you can see from the title change of my reply, it may be better to say that you have found some relief for your POIS symptoms.
Let us know how it goes in 3 months, and if your POIS symptoms are still under control.
I looked at the references you gave. The author himself is very clear about the fact that what he proposes is a pure "theory" ( he should have used the word "hypothesis", though, not "theory" ). I cannot say that any of what he explains makes sense to me, however.
The other article, says the following, to express that all the inflammation and auto-immune diseases we see more and more are left unexplained, as if we would have no evidence that they are to blame :
"Well, there’s the low-fat diet craze. There’s the switch to high fructose corn syrup. We started playing video games and using computers. We started using a hell of a lot more chemicals, additives, and flavor enhancers in food. Those sound bad, and most pin the blame such things without needing to see much evidence, but there’s not really much of a theory that one can build about how those things cause such a tidal wave of inflammation and the immune system basically going apeshit to boot."
It is rather surprising that the author has not found any sound study proving the link between the bad occidental diet and inflammation, when there are plenty of such studies. For example, a 10 seconds search for "sugar and inflammation" will lead you to references like
https://www.healthline.com/nutrition/sugar-and-inflammation , where you can find links to many scientific articles proving that abundant refined sugar like what is found in our diet causes inflammation in the body. There are plenty of such studies proving that sugar causes inflammation in the body. For example, one of these study proves that consuming a 50-gram dose of fructose causes a spike in inflammatory markers like C-reactive protein (CRP) just 30 minutes later, and that CRP remains high for over two hours (
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4290803/ ).
I am not really attracted to a hypothesis pointing to a vitamin as the main culprit for inflammation, from someone who seem to ignore well-known data, and does not address at all the fact the North American diet contains a lot of refined sugars, artificial flavoring, artificial colors, nasty preservatives, chemical pesticides and herbicides on fruits and veggies, industrial additive like aspartame, monosodium glutamate, etc. Than, after saying that none of these are the real cause, he goes on to say that the culprit is vitamin A.
Correlation does not equal causation, that is a basic scientific rule. His only cue he bases his hypothesis on is that he had been on a low vitamin A diet for years, probably a meat-based diet, and that this has been good for his health. I am not convinced at all that all those diets based mostly if not solely on meat are good in themselves, or that it is what they exclude that is helping lower inflammation. What if they were efficient because, for example, they exclude refined sugar ? there is no refined sugars in meat, for sure. I am not saying that this is actually what is good in them, but since refined sugar is proven to raise inflammation in the body, it is clear that cutting refined sugar from your diet will lower inflammation.
Too much vitamin A supplementation is not good, since vitamin A is a lipophilic vitamin, and can accumulate in the body ( contrty to hydophilic vitamins, which are eliminated by the kidney when concentration is too hing in the blood). But from the current medical knowledge, you cannot get to toxic level of vitamin A through a balanced diet, you need to over-supplement to get to a toxic level of vitamin A.
Nevertheless, I am glad for you that your diet changes have brought you some relief, even if not for the reasons you thought.
