I was diagnosed with Leaky Gut about 2 years ago. My gastroenterologist is "into" alternative therapies instead of just prescription medicines (he's also an ex-military doctor, which to me is a strange combination!). He conducts medical studies on various problems. This is what he recommended for me, but PLEASE keep in mind that I am an adult female, well able to express opinions about side-effects, etc. Maybe you can mention these to your child's doctor and see what they recommend as far as dosages, etc. Glutamine, 500mg, 3 capsules twice a day, and Ultraclear Sustain, 1 scoop in chilled water or juice daily (he didn't say how much liquid). I hope this helps!