I got a friend on ISO about 16 months ago who when she went looking for the right ISO stumbled onto HS-90 (aka Immunocal). She sent me some but I felt no difference between that and the Interactive ISO...
As I have written a bunch of times about the ISO sulfurs, my ND must have first brought it up 5 or so years ago. But as already explained the liver phase II toxicity is directly tied up with IBS (all forms) with ileitis and of course the source of the toxicity is parasites.