So just read Stephen´s substack about intestinal permeability, which is fantastic! and looking forward to read part 2 of it. In regards of developing food sensitivity due to intestinal permeability, what makes some people develop food sensitivity to one food, like fish or eggs, but not to others? What factors determine which undigested proteins cross the gut barrier? I mean what makes some undigested food proteins cross the gut barrier into your bloodstream while others don´t cross it? Is it because the gut barrier although it is permeable now that you have got leaky gut, it still remains with certain capacity of stoping some proteins to get in your bloodstream, depending on the size of the gap that you thight junctions have got, or how many gaps your gut has got? Therefore letting in lets say the smaller molecules and still stoping the bigger ones? Or could it be related to its structure, that your gut barrier is able to stop this structures somehow, maybe binding to them, and can´t bind to other structures and stop them from crossing because it has lost its capacity to hold on to this molecules any more? Just thinking about what is really going on in the gut 😅 Can anyone explain please!!!!