Hi there!
Intestinal absorption (?permeability) cannot be described by urine tests, though it can be affected by both lactulose and mannitol.
Hope this information is helpful.
Take care!
I need help I sent a post on 2/16 but I'm not sure if this website really works I didn't get an answer or maybe I just don't know how to work the website ... I just got my blood test back my LGA serum are 477 H and NEUTROPHILS,ABSOLUTE are 1316 L ... Shld I be worried my B12 number if fine. What questions shld I ask my doc.. I'm still feeling sick . Thanks for your help