Hi
One thing that might have some effect is to find some ginger essential oil( maybe some peppermint as well) and put 1-2 drops in a base oil then rub on the liver area every night.
Have you tried the digestive tonic in some fruit juice after he has eaten? peppermint in the tonic does has some potasium and this will help to flush things thru.
I would still say to go back to schulz no3 even if it is high dose and maybe write to him as he does publish letters in his newsletters. then if he did respond then you would see the anser on his site.
Might find a bit of slippery Elm in some fruit juice would take out toxins and has a soothing effect on the bowels.