I've been investigating this pathway myself for a while, due to data from my NutrEval that I was low on just about everything, especially glutathione, suggesting malabsorption of some kind, especially fats, which is evident with steatorrhea. I even recently had a couple episodes of sharp, sudden biliary colic. Nothing really resolved the fat issue, despite trying many things.
I had all sorts of tests done; all that was discovered was a hyperkinetic gallbladder. This is an uncommon finding, such that medicine doesn't really know if it is problem.
In any case, I've been experimenting with high dose Vitamin C to treat some possible latent infections. I'm titrating up to my bowel tolerance dose. I hit 15g the day before yesterday, and the steatorrhea just disappeared. I had read tangentally that it can help with fat utilization, but wasn't looking for it or expecting that. Whether it was clearing something out of the small intestine (it does treat SIBO) or affecting something else, who knows, but something changed for the better.
I found last fall that larger does, 2g-3g a day, fixed my ferritin/iron issue. I'm going to recheck glutathione in a few months to see if that improves. Can't hurt I believe, as my doc at the time said my level was one of the lowest he'd ever seen.