I know for sure that Beverly International break down well. I take a glass of vinager and drop one in and if it does not break down I do not use them ever again. I do not want to poop out my protein undigested some of the cheaper brands of liver pills compress them too much and use too hard of binders and coating so it does no good.
Their is a guy that did some testing but I think he made an acid solution that match's the stomach and he lists what worked and what did not. He also found that the ones that did not disolve in his
test did not work well for him when he used them either. I know he liked Beverly International and another brand that I can not recall!