All boils back down to LEAKY GUT and imbalanced microbiome
And what causes this?
A normal poor diet deficient in nutrients and minerals and prebiotics
Also antibiotics and anything else that kills off gut bacteria, particularly your good bacteria you want
the typical medical establishment never discusses food in terms of healing you, helping your gut bacteria, making it a better environment for them, and actually using food as part of a way to improve your health
also they never prescribe or encourage probiotics and prebiotics after antibiotics have been used and decimated your gut bacteria