@xena - that's a very good question. I know many of us have had problems with liver toxicity but I don't recall hearing about such a test. However, a quick google search turned this up:
https://www.doctorsdata.com/hepatic-detox-profile/
I can't vouch for this test, I've never had it, but might be worth checking out. I have heard of Doctors Data before and believe it's a reputable company.
My chiropractor who does muscle testing helped me do a liver detox 11 or 12 years ago which was very helpful.
And here's a good article about liver detoxification phase II support:
http://www.diagnose-me.com/treatment/liver-detoxification-phase-II-support.html