I don’t know whether true or not but it does seem odd to me that If there is such a large volume of liver injury caused by a brands supplements then there’d be class action suits left and right and there’d be some literature out there discussing the issue. While supplements are definitely non regulated and are often contaminated with off label “stuff”, it still seems like that would get out in some form if regular medical issues are occurring.
That said, I may be searching for the wrong thing online and am missing it.